KS3 chemistry practice exam revision questions on chemicals and material behaviour for AQA, Edexcel & OCR KS3 chemistry KS3 science courses

This symbol means a chemical is? [7e-1]
1. corrosive
2. harmful
3. an irritant
4. toxic
This symbol means a chemical is? [7e-2]
1. corrosive
2. harmful
3. oxidising
4. toxic
This symbol means a chemical is? [7e-3]
1. an oxidising agent
2. toxic
3. an irritant
4. corrosive
This symbol means a chemical is? [7e-4]
1. corrosive
2. harmful
3. an irritant
4. toxic
Which is the strongest alkali? [7e-5]
1. limewater
2. baking soda
3. vinegar
4. wine
Which is the weakest alkali? [7e-6]
1. limewater
2. baking soda
3. vinegar
4. wine
Which is the strongest acid? [7e-7]
1. limewater
2. baking soda
3. vinegar
4. wine
Which is the weakest acid? [7e-8]
1. limewater
2. baking soda
3. vinegar
4. wine
Which of the following can be mixed to form a neutral solution? [7e-9]
1. limewater and fizzy drink
2. baking soda and toothpaste
3. vinegar and wine
4. calamine lotion and common salt
Which of the following can be mixed to form a neutral solution? [7e-10]
1. limewater and washing soda
2. baking soda and wine
3. vinegar and common salt
4. ammonia and limewater
Which of the following can be safely used to treat an acid bee sting? [7e-11]
1. limewater
2. wine
3. calamine lotion
4. common salt
Which of the following can be safely used to treat an alkaline wasp sting? [7e-12]
1. calamine lotion
2. common salt
3. washing soda
4. vinegar
Which of the following is most likely to be part of an antacid indigestion medicine? [7e-13]
1. sodium hydrogencarbonate
2. ammonia
3. washing soda
4. limewater
Which of the following is the safest to use to treat an acid nettle sting? [7e-14]
1. wine
2. sodium hydrogencarbonate
3. washing soda
4. limewater
A small amount of a dense white powder was mixed with water in a test tube and the mixture well shaken. None of the white powder sank to the bottom of the test tube. A few drops of universal indicator were added and the solution turned blue. This meant the white powder was? [7e-15]
1. a soluble neutral substance
2. a slightly soluble acid
3. a very soluble alkali
4. a slightly soluble alkali
A small amount of a dense white powder was mixed with water in a test tube and the mixture well shaken. Some of the white powder sank to the bottom of the test tube. A few drops of universal indicator were added and the solution turned blue. This meant the white powder was? [7e-16]
1. a soluble neutral substance
2. a slightly soluble acid
3. a very soluble alkali
4. a slightly soluble alkali
A small amount of a dense white powder was mixed with water in a test tube and the mixture well shaken. None of the white powder sank to the bottom of the test tube. A few drops of universal indicator were added and the solution turned green. This meant the white powder was? [7e-17]
1. a soluble neutral substance
2. a slightly soluble acid
3. a slightly soluble neutral substance
4. a soluble alkali
A small amount of a dense white powder was mixed with water in a test tube and the mixture well shaken. Some of the white powder sank to the bottom of the test tube. A few drops of universal indicator were added and the solution turned green. This meant the white powder was? [7e-18]
1. a soluble acidic substance
2. a slightly soluble neutral substance
3. a soluble acidic substance
4. a slightly soluble alkali
A small amount of a dense white powder was mixed with water in a test tube and the mixture well shaken. None of the white powder sank to the bottom of the test tube. A few drops of universal indicator were added and the solution turned orange. This meant the white powder was? [7e-19]
1. a soluble weak alkali
2. a very soluble neutral substance
3. a soluble weak acid
4. a slightly soluble strong acid
A small amount of a dense white powder was mixed with water in a test tube. Some of the white powder sank to the bottom of the test tube and the mixture well shaken. A few drops of universal indicator were added and the solution turned red. This meant the white powder was? [7e-20]
1. a soluble weak alkali
2. a slightly soluble neutral substance
3. a soluble weak acid
4. a slightly soluble strong acid
Which of the following is the pH of a strong acid? [7e-21]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of the following is the pH of a strong alkali? [7e-22]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of the following is the pH of a weak acid? [7e-23]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of the following is the pH of a weak alkali? [7e-24]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of these is a weak acid? [7e-25]
1. fizzy lemonade (flavouring + carbonated water)
2. battery acid (sulfuric acid)
3. salt solution (aqueous sodium chloride)
4. oven cleaner (ammonia solution)
Which of these forms the most corrosive liquid? [7e-26]
1. fizzy lemonade (flavouring + carbonated water)
2. battery acid (sulfuric acid)
3. salt solution (aqueous sodium chloride)
4. oven cleaner (ammonia solution)
Which of these gives a neutral solution in water? [7e-27]
1. fizzy lemonade (flavouring + carbonated water)
2. battery acid (sulfuric acid)
3. salt solution (aqueous sodium chloride)
4. oven cleaner (ammonia solution)
Which of these is a weak alkali in solution? [7e-28]
1. fizzy lemonade (flavouring + carbonated water)
2. battery acid (sulfuric acid)
3. salt solution (aqueous sodium chloride)
4. oven cleaner (ammonia solution)
A substance was dissolved in water containing universal indicator. The indicator turned red. This shows the dissolved substance was a? [7e-29]
1. strong acid
2. weak acid
3. strong alkali
4. weak alkali
A substance was dissolved in water containing universal indicator. The indicator turned orange. This shows the dissolved substance was a? [7e-30]
1. strong acid
2. weak acid
3. strong alkali
4. weak alkali
A substance was dissolved in water containing universal indicator. The indicator turned violet. This shows the dissolved substance was a? [7e-31]
1. very weak acid
2. weak acid
3. strong alkali
4. weak alkali
A substance was dissolved in water containing universal indicator. The indicator turned pale blue. This shows the dissolved substance was a? [7e-32]
1. strong acid
2. very weak acid
3. very strong alkali
4. weak alkali
A substance was dissolved in water containing universal indicator. The indicator turned yellow. This shows the dissolved substance was a? [7e-33]
1. very weak acid
2. weak alkali
3. very strong alkali
4. moderately strong acid
A substance was dissolved in water containing universal indicator. The indicator turned dark green. This shows the dissolved substance was a? [7e-34]
1. very weak acid
2. very weak alkali
3. moderately strong alkali
4. moderately strong acid
A substance was dissolved in water containing universal indicator. The indicator turned light green. This shows the dissolved substance was a? [7e-35]
1. very weak acid
2. very weak alkali
3. nearly neutral substance
4. moderately strong alkali
A substance was dissolved in water containing universal indicator. The indicator didn't change colour. This shows the dissolved substance was probably a? [7e-36]
1. very weak acid
2. very weak alkali
3. substance neutralised by water
4. nearly neutral substance
The diagram shows a more elaborate and more accurate way of doing a neutralisation reaction using a conical flask, pipette and burette.
Given the general word equation for neutralisation: acid + alkali ==> salt + water
What pH value would the acid have on its own in water? [7e-37]
1. pH 1
2. pH 14
3. pH 7
4. pH 8
The diagram shows a more elaborate and more accurate way of doing a neutralisation reaction using a conical flask, pipette and burette.
Given the general word equation for neutralisation: acid + alkali ==> salt + water
What pH value would the alkali have on its own in water? [7e-38]
1. pH 1
2. pH 14
3. pH 7
4. pH 6
The diagram shows a more elaborate and more accurate way of doing a neutralisation reaction using a conical flask, pipette and burette.
Given the general word equation for neutralisation: acid + alkali ==> salt + water
What pH value would the solution be at the end of the reaction? [7e-39]
1. pH 6
2. pH 10
3. pH 7
4. pH 8
The diagram shows a more elaborate and more accurate way of doing a neutralisation reaction using a conical flask, pipette and burette.
Given the general word equation for neutralisation: acid + alkali ==> salt + water
What pH value would the water have on its own? [7e-40]
1. pH 5
2. pH 8
3. pH 6
4. pH 7
A lake is found to be too acidic to allow fish to live. Which substance could be added to the water reduce the acidity in the lake? [7e-41]
1. quicklime
2. sodium hydroxide
3. artificial fertiliser
4. charcoal
Soil is found to be too acidic to allow healthy flower growth. Which substance could be added to reduce the acidity in the soil? [7e-42]
1. sodium hydroxide
2. slaked lime
3. phosphate-potassium fertiliser
4. charcoal
Which of the following 'fizzes' when acid is added to it? [7e-43]
1. cooking salt
2. potato chips
3. bicarbonate of soda
4. household ammonia
Which of the following 'fizzes' when acid is added to it? [7e-44]
1. cooking salt
2. potato chips
3. household ammonia
4. baking powder
Which statement about acids or alkalis is TRUE? [7e-45]
1. spilled acids and alkalis are made safer by diluting with water
2. acids are not safe enough to be used in food preparations
3. aspirin is a weak alkali
4. antacids in indigestion mixtures are weak acids
Which statement about acids or alkalis is TRUE? [7e-46]
1. spilled acids and alkalis are not made safer by diluting with water
2. acids are safe enough to be used in food preparations but they are sour tasting
3. aspirin is a weak alkali
4. antacids in indigestion mixtures are weak acids
Which statement about acids or alkalis is TRUE? [7e-47]
1. spilled acids and alkalis are not made safer by diluting with water
2. acids are not safe enough to be used in food preparations because they are too sour tasting
3. aspirin is a weak acid
4. antacids in indigestion mixtures are weak acids
Which statement about acids or alkalis is TRUE? [7e-48]
1. spilled acids and alkalis are not made safer by diluting with water
2. acids are not safe enough to be used in food preparations because they are too sour tasting
3. aspirin is a weak alkali
4. antacids in indigestion mixtures are weak alkalis
Which statement about acids or alkalis is TRUE? [7e-49]
1. orange juice is a weakly acid solution
2. toothpaste can be weakly acidic to remove plaque
3. oven spray cleaners can be a strongly acidic
4. vinegar is a harmless weak alkali
Which statement about acids or alkalis is TRUE? [7e-50]
1. orange juice is a weak alkali
2. toothpaste can be weakly alkaline to neutralise plaque acid
3. oven spray cleaners can be a strongly acidic
4. vinegar is a harmless weak alkali
Which statement about acids or alkalis is TRUE? [7e-51]
1. orange juice is a strongly acid solution
2. toothpaste can be weakly acid to neutralise plaque
3. oven spray cleaners can be moderately alkaline
4. vinegar is a harmless weak alkali
Which statement about acids or alkalis is TRUE? [7e-52]
1. orange juice is a strongly acid solution
2. toothpaste can be weakly acid to neutralise plaque
3. oven spray cleaners can be a strongly acid
4. vinegar is a harmless weak acid
Which statement is most likely to be TRUE? [7e-53]
1. sulfuric acid is a harmful acid
2. vinegar is a very corrosive acid
3. sodium hydroxide is a safe alkali
4. sodium bicarbonate is a strong harmful alkali
Which statement is most likely to be TRUE? [7e-54]
1. sulfuric acid is a not a corrosive acid
2. vinegar is a relatively harmless acid
3. sodium hydroxide is a safe alkali
4. sodium bicarbonate is a strong harmful alkali
Which statement is most likely to be TRUE? [7e-55]
1. sulfuric acid is a not a corrosive acid
2. vinegar is a relatively harmless alkali
3. sodium hydroxide is a harmful strong alkali
4. sodium bicarbonate is a weak harmless acid
Which statement is most likely to be TRUE? [7e-56]
1. sulfuric acid is a not a corrosive acid
2. vinegar is a potentially harmful strong acid
3. sodium hydroxide is a harmless weak alkali
4. sodium bicarbonate is a weak harmless alkali
The graph lines show what happens to the pH of a solution, when acids and alkalis are mixed together. Which statement is TRUE? [7e-57]
1. the brown graph line shows the change in pH when alkali is added to an acid solution
2. the purple graph line shows that more acid than alkali is needed to complete a neutralisation
3. volume y shows the amount of acid needed to neutralise an alkaline solution
4. pH k corresponds to when an alkaline solution has been neutralised
The graph lines show what happens to the pH of a solution, when acids and alkalis are mixed together. Which statement is TRUE? [7e-58]
1. the brown graph line shows that more alkali than acid is needed to complete a neutralisation
2. the purple graph line shows the change in pH when acid is added to an alkaline solution
3. volume y shows the amount of acid needed to neutralise an alkaline solution
4. pH k corresponds to when an alkaline solution has been neutralised
The graph lines show what happens to the pH of a solution, when acids and alkalis are mixed together. Which statement is TRUE? [7e-59]
1. the brown graph line shows that more alkali than acid is needed to complete a neutralisation
2. the purple graph line shows that more acid than alkali is needed to complete a neutralisation
3. volume w shows the amount of acid needed to neutralise an alkaline solution
4. pH e corresponds to when an acid solution has been neutralised
The graph lines show what happens to the pH of a solution, when acids and alkalis are mixed together. Which statement is TRUE? [7e-60]
1. the brown graph line shows that more alkali than acid is needed to complete a neutralisation
2. the purple graph line shows that more acid than alkali is needed to complete neutralising
3. volume y shows the amount of acid needed to neutralise an alkaline solution
4. pH g corresponds to when an acid solution has been neutralised
Lemon juice is an acid and bleach is an alkali. Which statement is FALSE? [7e-61]
1. blue litmus stays blue in lemon juice
2. red litmus stays red in lemon juice
3. blue litmus stays blue in bleach
4. red litmus turns blue in bleach
Lemon juice is an acid and bleach is an alkali. Which statement is FALSE? [7e-62]
1. blue litmus turns red in lemon juice
2. red litmus turns blue in lemon juice
3. blue litmus stays blue in bleach
4. red litmus turns blue in bleach
Lemon juice is an acid and bleach is an alkali. Which statement is FALSE? [7e-63]
1. blue litmus turns red in lemon juice
2. red litmus stays red in lemon juice
3. blue litmus turns red in bleach
4. red litmus turns blue in bleach
Lemon juice is an acid and bleach is an alkali. Which statement is FALSE? [7e-64]
1. blue litmus turns red in lemon juice
2. red litmus stays red in lemon juice
3. blue litmus stays blue in bleach
4. red litmus stays red in bleach
Which is the strongest alkali? [7e-65]
1. bleach
2. baking soda
3. ammonia
4. toothpaste
Four different coloured substances were extracted from plant materials. The idea was too see if any of them could be used as pH indicators to see how acid or how alkaline a solution is. They were made into four solutions and tested with three solutions of pH 2, 7 and 11. From the results, which do you think would make the most useful indicator? [7e-66]
1. blue in pH 2, green in pH 7, green in pH 11
2. purple in pH 2, green in pH 7, orange in pH 11
3. red in pH 2, orange in pH 7, green in pH 11
4. red in pH 2, blue in pH 7, purple in pH 11
What do we call substances that change colour in acids or alkalis to tell us which solution is which? [7e-67]
1. filters
2. papers
3. indicators
4. charts
Complete the general word equation for neutralisation: acid + alkali ==> ???? [7e-68]
1. water
2. salt + carbon dioxide
3. salt
4. salt + water
Which word describes the reaction between an acid and an alkali? [7e-69]
1. neutralisation
2. condensation
3. oxidation
4. sedimentation
At an agricultural testing laboratory, four soil samples from a horticultural company were tested for their relative acidity or alkalinity by measuring their pH with a special calibrated pH meter. Quicklime is an alkaline solid agri-chemical used to control soil pH.

Which soil most likely needs quicklime to make it neutral for healthy plant growth? [7e-70]
1. soil pH 8
2. soil pH 5
3. soil pH 7
4. soil pH 9
At an agricultural testing laboratory, four soil samples from a horticultural company were tested for their relative acidity or alkalinity by measuring their pH with a special calibrated pH meter. Quicklime is an alkaline solid agri-chemical used to control soil pH.

Which soil is unlikely to need quicklime to make it neutral for healthy plant growth? [7e-71]
1. soil pH 3.2
2. soil pH 5.1
3. soil pH 6.8
4. soil pH 4.7
At an agricultural testing laboratory, four soil samples from a horticultural company were tested for their relative acidity or alkalinity by measuring their pH with a special calibrated pH meter. Quicklime is an alkaline solid agri-chemical used to control soil pH. Acidic peat can be added to make a soil less alkaline.

Which soil needs peat adding to it to make it more neutral for healthy plant growth? [7e-72]
1. soil pH 6
2. soil pH 5
3. soil pH 7
4. soil pH 9
At an agricultural testing laboratory, four soil samples from a horticultural company were tested for their relative acidity or alkalinity by measuring their pH with a special calibrated pH meter. Quicklime is an alkaline solid agri-chemical used to control soil pH.

Which soil needs the most quicklime to make it neutral for healthy plant growth? [7e-73]
1. soil pH 3
2. soil pH 5
3. soil pH 7
4. soil pH 9
Which of the following can be safely used to treat an alkaline wasp sting? [7e-74]
1. calamine lotion
2. lemonade
3. washing soda
4. common salt
Which of the following can be safely used to treat an acid bee sting? [7e-75]
1. limewater
2. wine
3. bicarbonate of soda
4. common salt
Which of the following is the safest to use to treat an acid nettle sting? [7e-76]
1. wine
2. limewater
3. washing soda
4. calamine lotion
A chemical company can accidentally spill a substance into a local stream that feeds into a trout fishing river. Which of the following possible spilled chemicals would cause the most immediate harm to aquatic river life? [7e-77]
1. sulfuric acid for car batteries
2. sodium chloride salt for de-icing roads
3. potassium phosphate for fertilisers
4. sodium hydrogencarbonate for antacid indigestion tablets
A chemical company can accidentally spill a substance into a local stream that feeds into a trout fishing river. Which of the following possible spilled chemicals would cause the most immediate harm to aquatic river life? [7e-78]
1. sodium chloride salt for de-icing roads
2. sodium hydroxide used to make soluble aspirin salts
3. potassium phosphate for fertilisers
4. sodium hydrogencarbonate for antacid indigestion tablets
Which of the following statements is completely TRUE? [7e-79]
1. Vinegar is alkaline and so preserves food
2. Cola fizzy drinks are weakly alkaline
3. Vitamin C is a safe weak acid
4. Washing up liquid is strongly alkaline but not harmful
Which of the following statements is completely TRUE? [7e-80]
1. Vinegar is alkaline and so preserves food
2. Cola fizzy drinks are weakly alkaline
3. Vitamin C is a safe strong acid
4. Washing up liquid is often weakly alkaline but not harmful
Which of the following statements is completely TRUE? [7e-81]
1. Vinegar is weakly acidic and preserves food
2. Cola fizzy drinks are weakly alkaline
3. Vitamin C is a safe strong acid
4. Washing up liquid is strongly alkaline but not harmful
Which of the following statements is completely TRUE? [7e-82]
1. Vinegar is strongly acidic and so preserves food
2. Cola fizzy drinks are weakly acidic but may harm teeth
3. Vitamin C is a safe strong acid
4. Washing up liquid is strongly alkaline but not harmful
Which of the following statements is TRUE about the dangers of acids and alkalis? [7e-83]
1. sodium hydroxide is a weak alkali and will not harm the skin
2. sulfuric acid is a weak acid and will not irritate the skin
3. hydrochloric acid is a strong acid but is found in the stomach
4. household bleaches made from sodium hydroxide and chlorine are not toxic
Which of the following statements is TRUE about the dangers of acids and alkalis? [7e-84]
1. hydrochloric acid is a weak acid and is found in fruit
2. household bleaches made from sodium hydroxide and chlorine are not toxic
3. sodium hydroxide is a weak alkali and will not harm the skin
4. sulfuric acid is a strong acid and will irritate the skin
Which of the following statements is TRUE about the dangers of acids and alkalis? [7e-85]
1. sodium hydroxide is a strong alkali and will harm the skin
2. household bleaches made from sodium hydroxide and chlorine are not harmful
3. hydrochloric acid is a weak acid and is found in fruit
4. sulfuric acid is a strong acid but will not harm the skin
Which of the following statements is TRUE about the dangers of acids and alkalis? [7e-86]
1. sodium hydroxide is a weak alkali and will not irritate the skin
2. household bleaches made from sodium hydroxide and chlorine are toxic
3. hydrochloric acid is a weak acid and is found in fruit
4. sulfuric acid is a strong acid but will not harm the skin
A student tested some solutions with universal indicator to see whether they were acid, alkaline or neutral. The resulting colours were as follows:
Solution U - violet : Solution V - orange : Solution W - green
Solution X - blue : Solution Y - red : Solution Z - yellow

Which solutions were neutral? [7e-87]
1. only solution Z
2. only solutions X and Y
3. only solution W
4. only solutions U and V
A student tested some solutions with universal indicator to see whether they were acid, alkaline or neutral. The resulting colours were as follows:
Solution U - violet : Solution V - orange : Solution W - green
Solution X - blue : Solution Y - red : Solution Z - yellow

Which solutions were acid? [7e-88]
1. only solution W
2. only solutions V and Y
3. only solution U
4. only solutions V, Y and Z
A student tested some solutions with universal indicator to see whether they were acid, alkaline or neutral. The resulting colours were as follows:
Solution U - violet : Solution V - orange : Solution W - green
Solution X - blue : Solution Y - red : Solution Z - yellow

Which solutions were alkaline? [7e-89]
1. only solutions U and X
2. only solutions V
3. only solution W
4. only solutions Y and Z
A student tested some solutions with universal indicator to see whether they were acid, alkaline or neutral. The resulting colours were as follows:
Solution U - violet : Solution V - orange : Solution W - green
Solution X - blue : Solution Y - red : Solution Z - yellow

Which solution is the most strongly acid? [7e-90]
1. solution U
2. only solution Y
3. solution Z
4. solution V
A student tested some solutions with universal indicator to see whether they were acid, alkaline or neutral. The resulting colours were as follows:
Solution U - violet : Solution V - orange : Solution W - green
Solution X - blue : Solution Y - red : Solution Z - yellow

Which solution is the most weakly acid? [7e-91]
1. solution U
2. solution Y
3. solution Z
4. solution V
Lakes can be too acidic from dissolved air pollutants like sulfur dioxide and cause a decline in fish populations. Alkaline lime can be added to the lake to help the situation. What type of reaction occurs between the lime and acid rain to affect the lake pH? [7e-92]
1. saturation
2. decomposition
3. condensation
4. neutralisation
The acid-alkaline properties of four versions of "DOC BROWN'S ANTI-STING LOTION" were being tested in the laboratory. Their pH's are listed below. Which would be described as the most acid? [7e-93]
1. lotion pH 5.4
2. lotion pH 6.9
3. lotion pH 7.9
4. lotion pH 10.5
The acid-alkaline properties of four versions of "DOC BROWN'S ANTI-STING LOTION" were being tested in the laboratory. Their pH's are listed below. Which would be described as nearly neutral? [7e-94]
1. lotion pH 5.4
2. lotion pH 6.9
3. lotion pH 7.9
4. lotion pH 10.5
The acid-alkaline properties of four versions of "DOC BROWN'S ANTI-STING LOTION" were being tested in the laboratory. Their pH's are listed below. Which would be the safest to use on an acid bee sting? [7e-95]
1. lotion pH 5.4
2. lotion pH 6.9
3. lotion pH 7.9
4. lotion pH 11.0
The acid-alkaline properties of four versions of "DOC BROWN'S ANTI-STING LOTION" were being tested in the laboratory. Their pH's are listed below. Which would be described as the most alkaline? [7e-96]
1. lotion pH 5.4
2. lotion pH 6.9
3. lotion pH 7.9
4. lotion pH 10.5
The acid-alkaline properties of four versions of "DOC BROWN'S ANTI-STING LOTION" were being tested in the laboratory. Their pH's are listed below. Which would be the safest and most effective to use on an alkaline wasp sting? [7e-97]
1. lotion pH 5.4
2. lotion pH 6.9
3. lotion pH 7.9
4. lotion pH 9.5
The pH's of four soils are listed below. Heather prefers an acidic soil for healthy growth. Which soil would be the best to grow heather in? [7e-98]
1. soil pH 6.9
2. soil pH 5.4
3. soil pH 7.9
4. soil pH 9.5
The pH's of four soils are listed below. Some varieties of the vegetable parsley prefer alkaline soil for healthy growth. Which soil would be the best to grow the parsley in? [7e-99]
1. soil pH 6.9
2. soil pH 5.4
3. soil pH 7.9
4. soil pH 7.1
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-100]
1. the pH of saliva is normally about 5 to 6
2. Jim's mouth fluids were slightly acid at the start of the experiment
3. there is no evidence that saliva can be mildly alkaline
4. eating cakes makes the mouth fluids more acid
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-101]
1. the pH of saliva is normally close to neutral
2. Jim's mouth fluids were slightly acid at the start of the experiment
3. there is no evidence that saliva can be mildly alkaline
4. eating cakes makes the mouth fluids weakly acid for many hours after eating
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-102]
1. the pH of saliva is normally weakly acid
2. Jim's mouth fluids were slightly alkaline at the start of the experiment
3. there is no evidence that saliva can be mildly alkaline
4. eating cakes makes the mouth fluids weakly acid for many hours after eating
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-103]
1. the pH of saliva is normally weakly acid
2. Jim's mouth fluids were slightly alkaline at the start of the experiment
3. there is evidence that saliva can be mildly alkaline
4. the toothpaste Jane used was neutral
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-104]
1. Jane's mouth fluids were slightly alkaline at the start of the experiment
2. there is no evidence that either Jim or Jane kept on eating a cake after 30 minutes
3. there is no evidence that saliva can be mildly alkaline
4. the toothpaste Jane used was mildly alkaline
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-105]
1. Jane's mouth fluids were slightly acid at the start of the experiment
2. there is no evidence that either Jim or Jane kept on eating a cake after 30 minutes
3. there is no evidence of a reaction between the toothpaste Jane used and her mouth fluids
4. there is no evidence that saliva can be mildly alkaline
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-106]
1. Jane's mouth fluids were slightly alkaline at the start of the experiment
2. there is evidence that Jim kept on eating a cake after 30 minutes
3. there is no evidence of a reaction between the toothpaste Jane used and her mouth fluids
4. there is no evidence that saliva can be mildly alkaline
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-107]
1. Jane's mouth fluids were slightly alkaline at the start of the experiment
2. there is no evidence that either Jane or Jim kept on eating a cake after 30 minutes
3. there is evidence that the toothpaste Jane used neutralised weak acids in her mouth fluids
4. there is no evidence that saliva can be mildly alkaline
The graph shows the results of an experiment to monitor the pH of mouth fluids when various foods are eaten. In this case, Jim and Jane were enjoying sweet cakes and eating one every five minutes from 10 minutes to 30 minutes of the experiment. The pH was still measured before they started eating and for 15 minutes after they were told to stop eating. The experiment lasted a total of 45 minutes and Jane brushed her teeth 5 minutes after eating her last cake.
What could you say is most likely TRUE based on the graph of results? [7e-108]
1. the pH of saliva is normally about 5 to 6
2. Jim's mouth fluids were slightly alkaline at the start of the experiment
3. the toothpaste Jane used was neutral
4. there is evidence that saliva can be mildly alkaline and neutralise weak acids in the mouth
DANGER - chemist at work!!!! Which word matches the following hazard warning description ... 'may make you ill if swallowed, breathed in or absorbed through the skin'? [7e-109]
1. harmful
2. irritant
3. corrosive
4. toxic
DANGER - chemist at work!!!! Which word matches the following hazard warning description ... 'may cause reddening or blistering of the skin'? [7e-110]
1. harmful
2. irritant
3. corrosive
4. toxic
DANGER - chemist at work!!!! Which word matches the following hazard warning description ... 'attacks and destroys living tissue'? [7e-111]
1. harmful
2. irritant
3. corrosive
4. toxic
DANGER - chemist at work!!!! Which word matches the following hazard warning description ... 'may kill you if swallowed, breathed in or absorbed through the skin'? [7e-112]
1. harmful
2. irritant
3. corrosive
4. toxic
Which gas is formed when a metal reacts with an acid? [7f-1]
1. hydrogen
2. oxygen
3. carbon dioxide
4. methane
Which gas is needed for any fuel to burn? [7f-2]
1. hydrogen
2. oxygen
3. carbon dioxide
4. methane
Which gas is formed when a carbonate reacts with acid? [7f-3]
1. hydrogen
2. oxygen
3. carbon dioxide
4. methane
Which gas is a naturally occurring fuel? [7f-4]
1. hydrogen
2. oxygen
3. carbon dioxide
4. methane
In a chemistry experiment, which word means what you start with? [7f-5]
1. reactant
2. product
3. equation
4. evaluation
In a chemistry experiment, which word means what you end up with? [7f-6]
1. reactant
2. product
3. equation
4. evaluation
In a chemistry experiment, which word represents the overall change? [7f-7]
1. reactant
2. product
3. equation
4. evaluation
In a chemistry preparation experiment, which word means how well it has gone? [7f-8]
1. reactant
2. product
3. equation
4. evaluation
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change has happened, and new substances have been formed? [7f-9]
1. the colour changes
2. no gas bubbles form
3. the mixture doesn't change temperature
4. a clear solution is formed
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change has happened, and new substances have been formed? [7f-10]
1. there is no colour change
2. gas bubbles form
3. the mixture doesn't change temperature
4. no precipitate forms (a solid forming out of mixing solutions)
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change has happened, and new substances have been formed? [7f-11]
1. there is no colour change
2. no gas bubbles form
3. the mixture changes temperature
4. a clear solution is formed
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change has happened, and new substances have been formed? [7f-12]
1. there is no colour change
2. no gas bubbles form
3. the temperature stays the same
4. a precipitate forms (a solid forming out of mixing solutions)
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change when an acid is mixed with an alkali with litmus paper in it? [7f-13]
1. there is a colour change
2. no gas bubbles form
3. the mixture does not change temperature
4. no precipitate forms (a solid forming out of mixing solutions)
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change when a suspected carbonate is added to an acid? [7f-14]
1. there is no colour change
2. gas bubbles form
3. the temperature stays the same
4. a clear solution is formed
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change when a fuel burns? [7f-15]
1. there is a coloured flame
2. no gas bubbles form
3. the mixture changes temperature
4. a clear solution is formed
A variety of observations can indicate whether or not a chemical reaction is happening when chemicals are mixed. Which of the following is most likely to indicate a chemical change when carbon dioxide is passed into limewater? [7f-16]
1. there is no colour change
2. no gas bubbles form
3. the temperature stays the same
4. a precipitate forms (a solid forming out of mixing solutions)
Which of the following best describes what is formed when methane reacts with oxygen? [7f-17]
1. carbon dioxide + water
2. salt + hydrogen
3. salt + water + carbon dioxide
4. an oxide
Which of the following is formed when a metal reacts with an acid? [7f-18]
1. carbon dioxide + water
2. salt + hydrogen
3. salt + water + carbon dioxide
4. an oxide
Which of the following is formed when a carbonate reacts with an acid? [7f-19]
1. carbon dioxide + water
2. salt + hydrogen
3. salt + water + carbon dioxide
4. an oxide
Which of the following is always formed when an element reacts with oxygen? [7f-20]
1. carbon dioxide + water
2. salt + hydrogen
3. salt + water + carbon dioxide
4. an oxide
Which of the following is the test for carbon dioxide gas? [7f-21]
1. the gas is bubbled into limewater
2. a glowing wooden splint is placed in the gas
3. a lit wooden splint is placed in the gas
4. damp blue litmus is placed in the gas
Which of the following is the test for oxygen gas? [7f-22]
1. the gas is bubbled into limewater
2. a glowing wooden splint is placed in the gas
3. a lit wooden splint is placed in the gas
4. damp blue litmus is placed in the gas
Which of the following is the test for hydrogen gas? [7f-23]
1. the gas is bubbled into limewater
2. a glowing wooden splint is placed in the gas
3. a lit wooden splint is placed in the gas
4. damp blue litmus is placed in the gas
Which of the following is the test for chlorine gas? [7f-24]
1. the gas is bubbled into limewater
2. a glowing wooden splint is placed in the gas
3. a lit wooden splint is placed in the gas
4. damp blue litmus is placed in the gas
When substance W was added to an acid, a colourless gas was formed that gave a squeaky pop with a lit splint. W is most likely to be a? [7f-25]
1. metal
2. metal carbonate
3. metal oxide
4. metal hydroxide
When substance X was added to an acid, a colourless gas formed that turned limewater 'milky'. X is most likely to be a? [7f-26]
1. metal
2. metal carbonate
3. metal oxide
4. metal hydroxide
When substance Y was added to an acid, the resulting solution turned green with universal indicator, and no gas bubbles were seen. Y is most likely to be a? [7f-27]
1. metal
2. metal carbonate
3. metal oxide
4. non-metal carbonate
Which of the following shows no reaction with acid? [7f-28]
1. magnesium
2. magnesium carbonate
3. copper carbonate
4. copper
Which of the following reacts fast with acids to form hydrogen? [7f-29]
1. magnesium
2. magnesium carbonate
3. copper carbonate
4. copper
Which of the following reacts with acid to form carbon dioxide gas and a colourless solution? [7f-30]
1. magnesium
2. magnesium carbonate
3. copper carbonate
4. copper
Which of the following reacts with acid to form carbon dioxide gas and a blue solution? [7f-31]
1. magnesium
2. magnesium carbonate
3. copper carbonate
4. copper
Which of the following burns to form the acidic gas sulfur dioxide? [7f-32]
1. magnesium sulfate
2. sulfuric acid
3. sulfur trioxide
4. sulfur (sulfur)
Which is TRUE about chemical reaction changes? [7f-33]
1. new substances are always formed
2. the change is easily reversed
3. sometimes new substances are formed
4. there is rarely visible evidence of the change
Which is TRUE about chemical reaction changes? [7f-34]
1. new substances are sometimes formed
2. the change is not easily reversed
3. no new substances are formed
4. there is rarely visible evidence of the change
Which is TRUE about physical changes but not chemical changes? [7f-35]
1. new substances are sometimes formed
2. the change is not easily reversed
3. no new substances are formed
4. there is rarely visible evidence of the change
Which is TRUE about physical changes but not chemical changes? [7f-36]
1. new substances are sometimes formed
2. there is rarely visible evidence of the change
3. new substances are always formed
4. the change is easily reversed
Which of the following is a physical change and not a chemical change? [7f-37]
1. melting gold to cast a statue in a mould
2. shiny steel changing to brown rust powder
3. burning petrol to form liquid water and carbon dioxide gas
4. zinc dissolving in hydrochloric acid
Which of the following is a physical change and not a chemical change? [7f-38]
1. shiny steel changing to brown rust powder
2. cast iron solidifying from a blast furnace
3. burning petrol to form liquid water and carbon dioxide gas
4. zinc dissolving in hydrochloric acid
Which of the following is a physical change and not a chemical change? [7f-39]
1. mixing acid with alkali causes a temperature rise
2. burning wax to form liquid water and carbon dioxide gas
3. steam condensing from boiling water
4. zinc dissolving in hydrochloric acid
Which of the following is a physical change and not a chemical change? [7f-40]
1. mixing acid with alkali causes a temperature rise
2. burning wax to form liquid water and carbon dioxide gas
3. zinc dissolving in hydrochloric acid
4. salt crystals forming from evaporating sea water
Which of the following is a physical change and not a chemical change? [7f-41]
1. petrol evaporating from a garage floor
2. burning wax to form liquid water and carbon dioxide gas
3. zinc dissolving in hydrochloric acid
4. marble chips dissolving in acid
Which of the following is a physical change and not a chemical change? [7f-42]
1. heated green copper carbonate turns it black
2. whisky condensing in a distillery
3. zinc dissolving in hydrochloric acid
4. marble chips dissolving in acid
Which of the following is a physical change and not a chemical change? [7f-43]
1. heated green copper carbonate turns it black
2. magnesium dissolving in sulfuric acid
3. sugar dissolving in water
4. marble chips dissolving in acid
Which of the following is a physical change and not a chemical change? [7f-44]
1. heated green copper carbonate turns it black
2. magnesium dissolving in sulfuric acid
3. adding lemon juice to solid bicarbonate of soda
4. freezing banana skins in liquid nitrogen
Which of the following represents a chemical change and not a physical change? [7f-45]
1. mixing acid with alkali causes a temperature rise
2. casting iron from a blast furnace
3. distilling whisky from fermented barley
4. freezing animal tissue in liquid nitrogen
Which of the following represents a chemical change and not a physical change? [7f-46]
1. casting iron from a blast furnace
2. brown powder forming on iron gates
3. distilling whisky from fermented barley
4. freezing animal tissue in liquid nitrogen
Which of the following represents a chemical change and not a physical change? [7f-47]
1. petrol evaporating from the fuel tank
2. sugar dissolving in vinegar
3. burning wax in a candle
4. crystallising blue copper sulfate crystals from a heated solution
Which of the following represents a chemical change and not a physical change? [7f-48]
1. petrol evaporating from the fuel tank
2. sugar dissolving in vinegar
3. crystallising blue copper sulfate crystals from a heated solution
4. dissolving zinc in hydrochloric acid
Which of the following represents a chemical change and not a physical change? [7f-49]
1. dissolving marble chips in acid
2. condensing pure water from a distillation
3. melting brass to cast a door knob
4. boiling water to drive out dissolved gases
Which of the following represents a chemical change and not a physical change? [7f-50]
1. condensing pure water from a distillation
2. heating green copper carbonate makes a black powder
3. melting brass to cast a door knob
4. boiling water to drive out dissolved gases
Which of the following represents a chemical change and not a physical change? [7f-51]
1. water freezing into hexagonal crystals
2. basalt crystals forming from molten lava
3. dissolving bicarbonate of soda in lemon juice
4. lemonade fizzing when the bottle top is taken off
Which of the following represents a chemical change and not a physical change? [7f-52]
1. water freezing into hexagonal crystals
2. basalt crystals forming from molten lava
3. lemonade fizzing when the bottle top is taken off
4. magnesium fizzing in sulfuric acid
Which is TRUE about burning fossil fuels? [7f-53]
1. most fuels contain a high percentage of carbon
2. the fuel reacts with nitrogen
3. little heat energy is released
4. clean fuels burn with a yellow flame
Which is TRUE about burning fossil fuels? [7f-54]
1. most fuels contain a low percentage of carbon
2. the fuel reacts with oxygen
3. little heat energy is released
4. clean fuels burn with a yellow flame
Which is TRUE about burning fossil fuels? [7f-55]
1. most fuels contain a low percentage of carbon
2. the fuel reacts with nitrogen
3. much heat energy is released
4. clean fuels burn with a yellow flame
Which is TRUE about burning fossil fuels? [7f-56]
1. most fuels contain a low percentage of carbon
2. the fuel reacts with nitrogen
3. little heat energy is released
4. clean fuels burn with a pale blue flame
A variety of observations can indicate when a chemical reaction is happening to form new substances when chemicals are mixed. Which of the following is most likely to indicate a chemical change when a metal is added to an acid? [7f-57]
1. gas bubbles form
2. there is no coloured product
3. the mixture does not change temperature
4. a clear solution is formed
A variety of observations can indicate when a chemical reaction is happening to form new substances when chemicals are mixed. Which of the following is most likely to indicate a chemical change when an acid is mixed with an alkali? [7f-58]
1. there is no obvious colour change
2. the mixture changes temperature
3. no gas bubbles form
4. no precipitate forms (a solid forming out of mixing solutions)
A solution X was tested by a student in various ways with different materials. The following results were obtained.
(1) Solution X gave no colour change with red litmus, but blue litmus turned red.
(2) Solution X turned universal indicator solution from green to orange.
(3) Solution X produced a slow 'fizzing' reaction with a marble chip. The gas formed gave a milky white precipitate when bubbled into limewater.
(4) Solution X produced a moderate 'fizzing' reaction with a strip of magnesium metal. A test tube of the gas formed gave a squeaky pop with a lit splint.
(5) Solution X produced a moderate 'fizzing' reaction with a pinch of 'bicarbonate of soda' powder. The gas formed gave a milky white precipitate when bubbled into limewater.
What could the student deduce about solution X from the results? [7f-59]
1. it is a strong alkali
2. it forms carbon dioxide when reacting with a metal
3. it is a weak acid
4. it forms hydrogen when reacting with a carbonate
A solution X was tested by a student in various ways with different materials. The following results were obtained.
(1) Solution X gave no colour change with red litmus, but blue litmus turned red.
(2) Solution X turned universal indicator solution from green to orange.
(3) Solution X produced a slow 'fizzing' reaction with a marble chip. The gas formed gave a milky white precipitate when bubbled into limewater.
(4) Solution X produced a moderate 'fizzing' reaction with a strip of magnesium metal. A test tube of the gas formed gave a squeaky pop with a lit splint.
(5) Solution X produced a moderate 'fizzing' reaction with a pinch of 'bicarbonate of soda' powder. The gas formed gave a milky white precipitate when bubbled into limewater.
What could the student deduce about solution X from the results? [7f-60]
1. it forms carbon dioxide when reacting with a metal
2. it will not form salts with an alkali
3. it is a weak alkali
4. it forms hydrogen when reacting with a metal
A solution X was tested by a student in various ways with different materials. The following results were obtained.
(1) Solution X gave no colour change with red litmus, but blue litmus turned red.
(2) Solution X turned universal indicator solution from green to orange.
(3) Solution X produced a slow 'fizzing' reaction with a marble chip. The gas formed gave a milky white precipitate when bubbled into limewater.
(4) Solution X produced a moderate 'fizzing' reaction with a strip of magnesium metal. A test tube of the gas formed gave a squeaky pop with a lit splint.
(5) Solution X produced a moderate 'fizzing' reaction with a pinch of 'bicarbonate of soda' powder. The gas formed gave a milky white precipitate when bubbled into limewater.
What could the student deduce about solution X from the results? [ 7f-61]
1. it forms carbon dioxide when reacting with a carbonate
2. it will not form salts with an alkali
3. it is a weak alkali
4. it forms carbon dioxide when reacting with a metal
A solution X was tested by a student in various ways with different materials. The following results were obtained.
(1) Solution X gave no colour change with red litmus, but blue litmus turned red.
(2) Solution X turned universal indicator solution from green to orange.
(3) Solution X produced a slow 'fizzing' reaction with a marble chip. The gas formed gave a milky white precipitate when bubbled into limewater.
(4) Solution X produced a moderate 'fizzing' reaction with a strip of magnesium metal. A test tube of the gas formed gave a squeaky pop with a lit splint.
(5) Solution X produced a moderate 'fizzing' reaction with a pinch of 'bicarbonate of soda' powder. The gas formed gave a milky white precipitate when bubbled into limewater.
What could the student deduce about solution X from the results? [7f-62]
1. it forms carbon dioxide when reacting with a metal
2. it will form salts with an alkali
3. it is a weak alkali
4. it forms hydrogen when reacting with a carbonate
A solution X was tested by a student in various ways with different materials. The following results were obtained.
(1) Solution X gave no colour change with red litmus, but blue litmus turned red.
(2) Solution X turned universal indicator solution from green to orange.
(3) Solution X produced a slow 'fizzing' reaction with a marble chip. The gas formed gave a milky white precipitate when bubbled into limewater.
(4) Solution X produced a moderate 'fizzing' reaction with a strip of magnesium metal. A test tube of the gas formed gave a squeaky pop with a lit splint.
(5) Solution X produced a moderate 'fizzing' reaction with a pinch of 'bicarbonate of soda' powder. The gas formed gave a milky white precipitate when bubbled into limewater.
What could the student deduce about solution X from the results? [7f-63]
1. it forms carbon dioxide when reacting with a metal
2. it will not form salts with an alkali
3. marble chips must be made of a carbonate
4. it forms hydrogen when reacting with a carbonate
Which of the following does NOT indicate a chemical change is happening when a candle burns? [7f-64]
1. light is given out from the flame
2. heat is given out by the flame
3. the candle goes out within a minute if a beaker is placed over it.
4. the heat from the flame melts the wax
The diagram shows a particular way of preparing a substance. How can you tell the method is for preparing a gaseous product? [7f-65]
1. bubbles are forming and collected
2. there is no filter funnel and paper to remove unreacted solid
3. the gas is not soluble in water
4. acids always produce gases when they react with a solid
The diagram shows a particular way of preparing a gaseous substance.
What does this method of preparation tell you about the gas being prepared? [7f-66]
1. it does not react with acids
2. it does not dissolve in water
3. it is not an alkali
4. it readily dissolves in water
Which of the following is only a physical change? [7f-67]
1. marble chips fizz with acid
2. magnesium burns brightly when heated in air
3. when zinc oxide is heated it turns yellow, on cooling it becomes white
4. heating green copper carbonate powder turns it black
The diagram shows an experiment to investigate the products of burning a hydrocarbon molecule like candle wax. What are the condensed colourless drops formed called? [7f-68]
1. carbon dioxide
2. oxygen
3. methane
4. water
The diagram shows an experiment to investigate the products of burning a hydrocarbon molecule like candle wax. If limewater is in the left-hand U, what is formed that causes the milky white precipitate? [7f-69]
1. carbon dioxide
2. condensed wax vapour
3. methane
4. water
Which of the following could be described as a reversible change? [7f-70]
1. marble chips fizz with acid
2. when zinc oxide is heated it turns yellow, on cooling it becomes white
3. magnesium burns brightly when heated in air
4. heating green copper carbonate powder turns it black
Chemical changes make new materials and tend not to be readily reversed. Physical changes do not make new materials and tend to be readily reversed. Which of the following is a chemical change? [7f-71]
1. the evaporation of a rain puddle
2. ice cracking a milk bottle
3. frying an egg
4. melting butter
Chemical changes make new materials and tend not to be readily reversed. Physical changes do not make new materials and tend to be readily reversed. Which of the following is a chemical change? [7f-72]
1. condensation forming on a window
2. ice cracking a milk bottle
3. melting butter
4. igniting a gas fire
Chemical changes make new materials and tend not to be readily reversed. Physical changes do not make new materials and tend to be readily reversed. Which of the following is a chemical change? [7f-73]
1. baking pottery clay in a kiln
2. ice cracking a milk bottle
3. melting butter
4. the evaporation of a rain puddle
Chemical changes make new materials and tend not to be readily reversed. Physical changes do not make new materials and tend to be readily reversed. Which of the following is a physical change? [7f-74]
1. baking pottery clay in a kiln
2. ice cracking a milk bottle
3. treating a bee sting
4. milk turning sour
Chemical changes make new materials and tend not to be readily reversed. Physical changes do not make new materials and tend to be readily reversed. Which of the following is a physical change? [7f-75]
1. baking pottery clay in a kiln
2. treating a wasp sting
3. melting butter
4. milk turning sour
Chemical changes make new materials and tend not to be readily reversed. Physical changes do not make new materials and tend to be readily reversed. Which of the following is a physical change? [7f-75]
1. baking pottery clay in a kiln
2. treating a wasp sting
3. wood rotting
4. condensation forming on windows
The diagram shows the test for carbon dioxide gas. What liquid is the gas bubbled into? [7f-77]
1. limewater
2. hydrochloric acid
3. carbonated water
4. universal indicator
Some antacid indigestion tablets contain carbonates such as sodium hydrogencarbonate. Which of the following is a simple test to see if a tablet contains a carbonate? [7f-78]
1. mix with universal indicator solution and see if it turns blue or purple
2. add a little acid, collect any gas formed and test it with limewater
3. add a little acid, collect any gas formed and test it with a lit splint
4. test the tablet with damp red litmus and see if it turns blue
Sometimes mineral ore sample can contain bits of free metal eg iron. Which of the following is a simple test to see if a rock contains bits of a metal? [7f-79]
1. mix with universal indicator solution and see if it turns green
2. add a little acid, collect any gas formed and test it with limewater
3. add a little acid, collect any gas formed and test it with a lit splint
4. test the resulting solution with red litmus and see if it turns purple
Which statement is TRUE when the yellow solid sulfur is heated in air and then burns to form a colourless gas? [7f-80]
1. it is a physical change
2. the change is easily reversed
3. the product is called sulfuric acid
4. the product is called sulfur dioxide
Which statement is TRUE when the yellow solid sulfur is heated in air and then burns to form a colourless gas? [7f-81]
1. it is a chemical change
2. the change is easily reversed
3. the reaction takes in heat energy
4. the product is called sulfuric acid
Which statement is TRUE when the yellow solid sulfur is heated in air and then burns to form a colourless gas? [7f-82]
1. it is a physical change
2. the change is not easily reversed
3. the reaction takes in heat energy
4. the product is called sulfuric oxide
Which statement is TRUE when the yellow solid sulfur is heated in air and then burns to form a colourless gas? [7f-83]
1. it is a physical change
2. the change is easily reversed
3. the reaction gives out heat energy
4. the product is called sulfuric oxide
The diagram shows a simple candle burning experiment and a graph of the results. What was the volume of the beaker that probably gave the least accurate result? [7f-84]
1. 100 cm³
2. 400 cm³
3. 800 cm³
4. 200 cm³
The diagram shows a simple candle burning experiment and a graph of the results. What volume of beaker would probably allow the candle to burn for 40 seconds? [7f-85]
1. 500 cm³
2. 450 cm³
3. 550 cm³
4. 350 cm³
The diagram shows a simple candle burning experiment and a graph of the results. What would be a reasonable estimate of the candle burning time if a 1500 cm³ beaker was used in the experiment? [7f-86]
1. 110 seconds
2. 120 seconds
3. 130 seconds
4. 140 seconds
The diagram shows a simple candle burning experiment and a graph of the results. during the experiment, what change happens to the gases in the beaker? [7f-87]
1. the oxygen decreases and the carbon dioxide decreases
2. the oxygen increases and the carbon dioxide increases
3. the oxygen decreases and the carbon dioxide increases
4. the oxygen increases and the carbon dioxide decreases
When water is added to baking powder the mixture steadily 'bubbles'. Which of the following is most likely to account for such an observation? [7f-88]
1. water is decomposed by the powder
2. trapped air in the powder is released
3. baking powder contains an acid and a metal that react together
4. baking powder contains an acid and a carbonate that react together
Which of the following statements best describes the arrangement of particles in a gas? [7g-1]
1. Close together and stationary
2. Close together and vibrating
3. Far apart and moving slowly
4. Very far apart and moving quickly
Which of the following statements best describes the arrangement of particles in a solid?[7g-2]
1. Close together and stationary
2. Close together and vibrating
3. Far apart and moving slowly
4. Very far apart and moving quickly
Which of the following statements best describes the arrangement of particles in a liquid? [7g-3]
1. Close together and stationary
2. Far apart and vibrating
3. Close together and moving freely
4. Very far apart and moving quickly
Which of the following best describes what happens to the particles of water when it freezes? [7g-4]
1. They gain energy and break up into atoms of hydrogen and oxygen
2. They gain energy and gain freedom to move about
3. They lose energy and escape into the atmosphere
4. They lose energy and lose freedom to move about
Which of the following best describes what happens to the particles of ice when it melts? [7g-5]
1. They gain energy and break up into atoms of hydrogen and oxygen,
2. They gain energy and gain freedom to move about
3. They lose energy and escape into the atmosphere
4. They lose energy and lose freedom to move about
Which of the following best describes what happens to the particles of water when it boils? [7g-6]
1. They gain energy and increase their freedom to move without significant attraction
2. They gain energy and gain freedom to move about
3. They lose energy and escape into the atmosphere
4. They lose energy and lose freedom to move about
Which of the following best describes what happens to the particles of water vapour when it condenses? [7g-7]
1. They gain energy and increase their freedom to move without significant attraction
2. They gain energy and gain freedom to move about
3. They lose energy and are closer and less free to move around
4. They lose energy and lose freedom to move about
Which of the following best describes what happens to the particles of water when it evaporates? [7g-8]
1. The higher kinetic energy particles increase their freedom to move without significant attraction
2. They gain energy and gain freedom to move about
3. They lose energy and escape into the atmosphere
4. They lose energy and lose freedom to move about
The table shows the melting points and boiling points of some substances A to D. Which substance is a solid at 25^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-9]
1. -39 and 354
2. 119 and 446
3. 15 and 126
4. -127 and -33
The table shows the melting points and boiling points of some substances A to D. Which substance is a liquid at 0^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-10]
1. -39 and 354
2. 119 and 446
3. 15 and 126
4. -127 and -33
The table shows the melting points and boiling points of some substances A to D. Which substance is a gas at 0^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-11]
1. -39 and 354
2. 119 and 446
3. 15 and 126
4. -127 and -33
The table shows the melting points and boiling points of some substances A to D. Which substance is a liquid at 30^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-12]
1. -39 and 10
2. 119 and 446
3. 15 and 126
4. -127 and -33
Air is in a bottle with a tight screw-top. When the bottle becomes warmer, the pressure inside increases because the molecules of air? [7g-13]
1. become bigger
2. become smaller
3. move faster
4. move slower
Air is in a bottle with a tight screw-top. When the bottle becomes cooler, the pressure inside decreases because the molecules of air? [7g-14]
1. become bigger
2. become smaller
3. move faster
4. move slower
When the air in a room becomes warmer a hanging balloon blown up with air becomes bigger because the molecules of air? [7g-15]
1. become bigger
2. become smaller
3. move faster
4. move slower
When the air in a room becomes cooler a hanging balloon blown up with air becomes smaller because the molecules of air? [7g-16]
1. become bigger
2. become smaller
3. move faster
4. move slower
The table shows the melting points and boiling points of some substances A to D. Which substance is a liquid at 20 ^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-17]
1. -142 and -78
2. -95 and 4
3. -66 and 42
4. 90 and 189
The table shows the melting points and boiling points of some substances A to D. Which substance is a solid at 20^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-18]
1. -142 and -78
2. -95 and 4
3. -66 and 42
4. 90 and 189
The table shows the melting points and boiling points of some substances A to D. Which substance is a gas at -60^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-19]
1. -142 and -78
2. -95 and 4
3. -66 and 42
4. 90 and 189
The table shows the melting points and boiling points of some substances A to D. Which substance is a liquid at -10^oC and a gas at 10^oC?
[Substance] Melting Point ^oC and Boiling Point ^oC [7g-20]
1. -142 and -78
2. -95 and 4
3. -66 and 42
4. 90 and 189
When water vapour in a cloud is gradually cooled, rainwater is formed. This change of state is called? [7g-21]
1. condensation
2. distillation
3. evaporation
4. saturation
Heat from the Sun changes water from liquid to a gas. This change of state is called? [7g-22]
1. condensation
2. distillation
3. evaporation
4. saturation
Gases diffuse because they? [7g-23]
1. are made of rapidly moving particles
2. have low boiling points
3. have a low density
4. easily move as convection currents
Liquids and dissolving solids diffuse because they? [7g-24]
1. are made of moving particles
2. have low boiling points
3. have a low density
4. easily move as convection currents
The table below shows the melting points and boiling points of substances A to D. Which substance is a gas at 25^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-25]
1. mpt = -127, bpt = -33
2. mpt = -39, bpt = 354
3. mpt = 63, bpt = 760
4. mpt = 119, bpt = 446
The table below shows the melting points and boiling points of substances A to D. Which substance is a liquid at 25^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-26]
1. mpt = -127, bpt = -33
2. mpt = -39, bpt = 354
3. mpt = 63, bpt = 760
4. mpt = 119, bpt = 446
The table below shows the melting points and boiling points of substances A to D. Which substance is a solid at 100^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-27]
1. mpt = -127, bpt = -33
2. mpt = -39, bpt = 354
3. mpt = 63, bpt = 760
4. mpt = 119, bpt = 446
The table below shows the melting points and boiling points of substances A to D. Which substance is a solid at 100^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-28]
1. mpt = -127, bpt = -33
2. mpt = 99, bpt = 354
3. mpt = 19, bpt = 27
4. mpt = 101, bpt = 116
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range 10^oC to 90^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-29]
1. mpt = 0, bpt = 100
2. mpt = -200, bpt = 40
3. mpt = 20, bpt = 350
4. mpt = -110, bpt = 80
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range -120^oC to 20^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-30]
1. mpt = 0, bpt = 100
2. mpt = -200, bpt = 40
3. mpt = -40, bpt = 350
4. mpt = -110, bpt = 80
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range 0^o>C to 100^oC?
[Substance] Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-31]
1. mpt = 0, bpt = 100
2. mpt = -200, bpt = 40
3. mpt = -40, bpt = 350
4. mpt = -110, bpt = 80
The table below shows the melting points and boiling points of substances A to D. Which substance is suitable to use in a thermometer that measures in the range -4^oC to 50^oC?
[Substance], Melting point ^oC(mpt), Boiling Point ^oC(bpt) [7g-32]
1. mpt = 0, bpt = 100
2. mpt = -200, bpt = 40
3. mpt = 40, bpt = 350
4. mpt = -110, bpt = 80
Which of the following best explains why gases have a low density? [7g-33]
1. the gas particles are very small
2. the gas particles are far apart
3. gas particles move fast
4. the attractive forces between gas particles are very weak
Which of the following is a particle model of a gas? [7g-34]
Which of the following is a particle model of a liquid? [7g-35]
Which of the following is a particle model of a solid? [7g-36]
Water turning to a solid is called? [7g-37]
1. freezing
2. melting
3. boiling
4. condensing
Butter on a hot plate is seen to be? [7g-38]
1. freezing
2. melting
3. boiling
4. condensing
When water turns to steam it has been? [7g-39]
1. evaporating
2. melting
3. boiling
4. condensing
Which of these is a solid? [7g-40]
1. air
2. oxygen
3. rock
4. water
Which of these is a liquid? [7g-41]
1. air
2. oxygen
3. rock
4. water
Which of these is a gas? [7g-42]
1. air
2. ice
3. rock
4. water
Which of these is a gas? [7g-43]
1. sand
2. oxygen
3. rock
4. water
Which of these is a solid? [7g-44]
1. petrol
2. oxygen
3. ice
4. helium
Which of these is a gas? [7g-45]
1. sand
2. cream
3. petrol
4. helium
Which describes sand? [7g-46]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which describes carbon dioxide? [7g-47]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which describes cooking oil? [7g-48]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which describes a cream cake? [7g-49]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which describes set concrete? [7g-50]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which of A to D describes the smell of food? [7g-51]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which of A to D describes petrol? [7g-52]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which of A to D describes toothpaste? [7g-53]
1. a solid
2. a gas
3. a liquid
4. difficult to classify simply as gas, liquid or solid
Which of the following is the opposite of freezing? [7g-54]
1. melting
2. boiling
3. condensing
4. evaporating
Which of the following is the opposite of condensing? [7g-55]
1. melting
2. boiling
3. freezing
4. dissolving
Which of the following is the opposite of melting? [7g-56]
1. condensing
2. boiling
3. freezing
4. evaporating
Which of the following is the opposite of boiling? [7g-57]
1. evaporating
2. melting
3. freezing
4. condensing
Which of the following is the opposite of evaporating? [7g-58]
1. condensing
2. boiling
3. freezing
4. melting
Which of the following is the opposite of condensing? [7g-59]
1. dissolving
2. evaporating
3. freezing
4. melting
Which of the following best EXPLAINS why liquids flow much more easily than solids? [7g-60]
1. liquid particles have more energy than solid particles
2. liquid particles are lighter than solid particles
3. liquid particle attractive forces are weaker than solid particle attractive forces
4. liquid particles can change shape more easily than solid particles
Which of the following best EXPLAINS why some different liquids can easily and completely mix together? [7g-61]
1. liquid particles are very tiny
2. liquid particles can change shape very easily
3. liquid particles have lots of space between them
4. liquid particles have weak attractive forces and are free to move around
Which of the following best EXPLAINS why liquids or solids have a high density compared to gases? [7g-62]
1. there is little space between the strongly attracted liquid or solid particles
2. solid and liquid particles are heavier than gas particles
3. there are only very weak forces between gas particles
4. liquid or solid particles neatly fit together
Which of the following best EXPLAINS why most solids expand on heating? [7g-63]
1. there is little space between the particles
2. the particles vibrate more forcefully the higher the temperature
3. solid particles get bigger on heating
4. any trapped gas expands on heating
The word 'diffusion' means? [7g-64]
1. particles concentrating together
2. particles breaking apart
3. particles spreading around if free to move
4. particles gaining energy
Gas pressure is caused by? [7g-65]
1. gas particles expanding
2. gas particles hitting each other
3. gas particles gaining energy
4. gas particles hitting the container surface
Which of the following best EXPLAINS why gases are easily compressed? [7g-66]
1. gas particles have lots of space between them
2. gas particles are always hitting each other
3. gas particles have little energy
4. gas particles are easily squashed to a smaller shape
Which of the following best EXPLAINS why dust particles seem to 'dance' around at random when seen with a beam of sunlight? [7g-67]
1. they gain energy from the sunlight
2. the larger dust particles are being hit by lots of smaller air particles
3. the dust particles are hit by sunlight energy particles
4. the dust particles move due to warm air convection currents
The diagram shows an experiment using a light colourless gas (air) and a heavier brown coloured gas (bromine or nitrogen dioxide). The gases spread around in the gas jars by a process called? [7g-68]
1. condensation
2. evaporation
3. diffusion
4. sedimentation
The diagram shows an experiment using a light colourless gas (air) and a heavier brown coloured gas (bromine or nitrogen dioxide). The gases fully mix together because? [7g-69]
1. the gases have different densities (one is 'lighter' or 'heavier' than the other)
2. of convection currents in the air
3. the air can sink into the coloured gas and the coloured gas can float on air
4. all the gas particles can move around freely
The diagram shows an experiment using a light colourless gas (air) and a heavier brown coloured gas (bromine or nitrogen dioxide). The gases can completely spread throughout the gas jars because? [7g-70]
1. gas particles are not strongly attracted and free to move
2. there are always convection currents in air
3. the air can sink into the coloured gas and the coloured gas can float on air
4. the gases have different densities (one is 'lighter' or 'heavier' than the other)
Which of the following best EXPLAINS why the gas pressure in a metal cylinder containing oxygen gas, increases if it is heated? [7g-71]
1. more gas particles are formed and so there are more particle hits on the container side
2. the gas particles gain energy and hit the side of the container harder and more often
3. the metal atoms of the container surface vibrate more strongly
4. the gas particles collide and hit each other more frequently
Which of the following best describes a GAS? [7g-72]
1. definite volume, definite shape, does not readily flow, high density
2. fills container, definite shape, does not readily flow, low density
3. fills container, takes shape of container, flows easily, low density
4. definite volume, takes shape of container, flows easily, high density
Which of the following best describes a LIQUID? [7g-73]
1. definite volume, definite shape, does not readily flow, high density
2. fills container, definite shape, does not readily flow, low density
3. fills container, takes shape of container, flows easily, low density
4. definite volume, takes shape of container, flows easily, high density
Which of the following best describes a SOLID? [7g-74]
1. definite volume, definite shape, does not readily flow, high density
2. fills container, definite shape, does not readily flow, low density
3. fills container, takes shape of container, flows easily, low density
4. definite volume, takes shape of container, flows easily, high density
Which of the following best EXPLAINS why a thin wire snaps if too much weight is put on it? [7g-75]
1. the attractive forces between the particles of the wire are weakened by the weight
2. the attractive forces between the particles of the wire are no longer strong enough to match the weight
3. the particles of the wire get stretched and become too thin and weak to hold the weight
4. the particles of the wire lose energy and cannot attract each other anymore
MELTING is the state change from? [7g-76]
1. solid to liquid
2. liquid to solid
3. liquid to gas
4. gas to liquid
FREEZING is the state change from? [7g-77]
1. solid to liquid
2. liquid to solid
3. liquid to gas
4. gas to liquid
BOILING is the state change from? [7g-78]
1. solid to liquid
2. liquid to solid
3. liquid to gas
4. gas to liquid
CONDENSING is the state change from? [7g-79]
1. solid to liquid
2. liquid to solid
3. liquid to gas
4. gas to liquid
EVAPORATING is the state change from? [7g-80]
1. solid to liquid
2. liquid to solid
3. liquid to gas
4. gas to liquid
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-81]
1. X is melting between times t0 and t1
2. X is completely liquid between times t1 and t2
3. X is boiling between times t2 and t3
4. temperature TE1 is the melting point of X
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-82]
1. X is all solid between times t0 and t1
2. X is completely liquid between times t1 and t2
3. X is boiling between times t2 and t3
4. temperature TE2 is the melting point of X
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-83]
1. X is melting between times t0 and t1
2. X is melting between times t1 and t2
3. X is boiling between times t2 and t3
4. temperature TE2 is the melting point of X
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-84]
1. X is boiling between times t4 and t5
2. X is melting between times t0 and t1
3. X is all liquid between times t2 and t3
4. temperature TE1 is the boiling point of X
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-85]
1. X is boiling between times t4 and t5
2. X is all liquid between times t1 and t2
3. X is melting between times t2 and t3
4. temperature TE2 is the boiling point of X
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-86]
1. X is boiling between times t3 and t4
2. X is all liquid between times t1 and t2
3. X is melting between times t2 and t3
4. temperature TE1 is the boiling point of X
In winter freezing conditions can produce cracked milk bottles! In what way does water show UNUSUAL behaviour? [7g-87]
1. the ice expands on cooling
2. ice has a greater volume than liquid water
3. liquid water contracts on freezing to form ice
4. liquid water is less dense than ice
Problems can arise with railway steel track from changes in temperature.
Small gaps are left between each rail section to allow for changes in length. Which of the following is TRUE about the steel rails and change in temperature? [7g-88]
1. expansion happens when the steel atoms lose vibration energy
2. if no gap is made the rail can get thinner or thicker without becoming dangerously distorted
3. on average the rail track will expand more in the summer than the winter
4. on average the gap will be smaller in the winter than the summer
Problems can arise with railway steel track from changes in temperature.
Small gaps are left between each rail section to allow for changes in length. Which of the following is TRUE about the steel rails and change in temperature? [7g-89]
1. expansion happens when the steel atoms lose vibration energy
2. if no gap is made the rail can get thinner or thicker without becoming dangerously distorted
3. on average the rail track will contract more in the summer than the winter
4. on average the gap will be smaller in the summer than the winter
Problems can arise with railway steel track from changes in temperature.
Small gaps are left between each rail section to allow for changes in length. Which of the following is TRUE about the steel rails and change in temperature? [7g-90]
1. expansion happens when the steel atoms gain vibration energy
2. if no gap is made the rail can get thinner or thicker without becoming dangerously distorted
3. on average the rail track will contract more in the summer than the winter
4. on average the gap will be smaller in the winter than the summer
Problems can arise with railway steel track from changes in temperature.
Small gaps are left between each rail section to allow for changes in length. Which of the following is TRUE about the steel rails and change in temperature? [7g-91]
1. expansion happens when the steel atoms lose vibration energy
2. if no gap is made the rail can get longer becoming dangerously distorted
3. on average the rail track will contract more in the summer than the winter
4. on average the gap will be smaller in the winter than the summer
The graph shows the results of monitoring a hot liquid pure wax as it slowly cooled to room temperature. Which of the following can you deduce from the results? [7g-92]
1. from time b to c, the wax is all solid
2. from time c to d, some wax is still liquid
3. the melting point of the wax is temperature T2
4. from time a to b, solid wax is forming
The graph shows the results of monitoring a hot liquid pure wax as it slowly cooled to room temperature. Which of the following can you deduce from the results? [7g-93]
1. from time b to c, the wax is all solid
2. from time c to d, some wax is still liquid
3. the melting point of the wax is temperature T3
4. from time a to b the wax is still all liquid
The graph shows the results of monitoring a hot liquid pure wax as it slowly cooled to room temperature. Which of the following can you deduce from the results? [7g-94]
1. from time b to c, the wax is changing state from liquid to solid
2. from time c to d, some wax is still liquid
3. the freezing point of the wax is temperature T1
4. from time a to b, the wax is starting to freeze
The graph shows the results of monitoring a hot liquid pure wax as it slowly cooled to room temperature. Which of the following can you deduce from the results? [7g-95]
1. from time b to c, the wax is all liquid
2. from time c to d, all the wax is solid
3. the freezing point of the wax is temperature T1
4. from time a to b, the wax is starting to freeze
The graph shows the results of monitoring a hot liquid pure wax as it slowly cooled to room temperature. Which of the following can you deduce from the results? [7g-96]
1. from time b to c, the wax is all liquid
2. from time c to d, the remaining liquid wax freezes
3. the freezing point of the wax is temperature T2
4. from time a to b, the wax is starting to freeze
Which of the following best EXPLAINS why the liquid in a glass thermometer expands with rise in temperature? [7g-97]
1. the liquid particles get bigger expanding the liquid
2. the glass particles gain more energy and push the liquid particles up the tube
3. the glass contracts forcing the liquid further up the tube
4. the liquid particles gain more energy and collide more forcefully
Starting with the solid, the graph shows the results of measuring the temperature of substance X as it was heated from a low to a high temperature. Which of the following is TRUE? [7g-98]
1. X is all gas between times t4 and t5
2. X is completely liquid between times t1 and t2
3. X is boiling between times t2 and t3
4. temperature TE1 is the boiling point of X
In winter freezing conditions can produce cracked milk bottles. In what way does water show UNUSUAL behaviour? [7g-99]
1. the ice expands on cooling
2. ice has a smaller density than liquid water
3. liquid water contracts on freezing to form ice
4. liquid water is less dense than ice
Problems can arise with railway steel track from changes in temperature.
Small gaps are left between each rail section to allow for changes in length. Which of the following is TRUE about the steel rails and change in temperature? [7g-100]
1. on average the rail track will contract more in the summer than the winter
2. if no gap is made the rail can get thinner or thicker without becoming dangerously distorted
3. contraction happens when the steel atoms lose vibration energy
4. on average the gap will be smaller in the winter than the summer
Which of the following does the particle picture represent? [7g-101]
1. gas
2. liquid
3. solid
4. partly melted solid
Which word means 'it will dissolve'? [7h-1]
1. soluble
2. solute
3. solvent
4. solution
Which word means 'the substance that dissolves'? [7h-2]
1. soluble
2. solute
3. solvent
4. solution
Which word means 'the liquid that dissolves the substance'? [7h-3]
1. soluble
2. solute
3. solvent
4. solution
Which word means 'the mixture from something dissolving'? [7h-4]
1. soluble
2. solute
3. solvent
4. solution
Which of the following means 'it won't dissolve'? [7h-5]
1. insoluble
2. dissolves
3. saturated
4. solubility
Which of the following means 'the solid substance particles completely mixes with the solvent particles'? [7h-6]
1. insoluble
2. dissolves
3. saturated
4. solubility
Which of the following about a solution means 'no more will dissolve'? [7h-7]
1. insoluble
2. dissolves
3. saturated
4. solubility
Which of the following means 'how much will dissolve'? [7h-8]
1. insoluble
2. dissolves
3. saturated
4. solubility
Which word means 'something you don't want in a substance'? [7h-9]
1. impurity
2. pure
3. mixture
4. impure
Which word means 'just one substance in the material'? [7h-10]
1. impurity
2. pure
3. mixture
4. impure
Which word means 'more than one substance in the material'? [7h-11]
1. impurity
2. pure
3. mixture
4. saturated
Which word means 'containing a substance you don't want in a material'? [7h-12]
1. impurity
2. pure
3. saturated
4. impure
The process to separate a mixture of sand and salt is shown in the diagram.
Which word best goes with 'mixing the salt with water'? [7h-13]
1. dissolving
2. filtering
3. evaporating
4. crystallising
The process to separate a mixture of sand and salt is shown in the diagram.
Which word best goes with 'removing the sand'? [7h-14]
1. dissolving
2. filtering
3. evaporating
4. crystallising
The process to separate a mixture of sand and salt is shown in the diagram.
Which word best goes with 'removing the water'? [7h-15]
1. dissolving
2. filtering
3. evaporating
4. crystallising
The process to separate a mixture of sand and salt is shown in the diagram.
Which word best goes with 'getting the pure salt'? [7h-16]
1. dissolving
2. filtering
3. evaporating
4. crystallising
The process to separate a mixture of sand and salt is shown in the diagram.
This process can be used to purify rock salt.
Which of these is the solvent? [7h-17]
1. water
2. sand
3. salt
4. salt solution
The process to separate a mixture of sand and salt is shown in the diagram.
This process can be used to purify rock salt.
Which of these is the insoluble material? [7h-18]
1. water
2. sand
3. salt
4. salt solution
The process to separate a mixture of sand and salt is shown in the diagram.
This process can be used to purify rock salt.
Which of these is the soluble material? [7h-19]
1. water
2. sand
3. salt
4. salt solution
The process to separate a mixture of sand and salt is shown in the diagram.
This process can be used to purify rock salt.
Which of these is the mixture? [7h-20]
1. water
2. sand
3. crystallised salt
4. salt solution
Which salt is the most soluble at 15^oC ? [7h-21]
1. NaCl sodium chloride
2. KNO₃ potassium nitrate
3. K₂SO₄ potassium sulfate
4. CuSO₄ copper sulfate
Which salt is the most soluble at 55^oC ? [7h-22]
1. NaCl sodium chloride
2. KNO₃ potassium nitrate
3. K₂SO₄ potassium sulfate
4. CuSO₄ copper sulfate
Which salt is the least soluble at 0^oC ? [7h-23]
1. NaCl sodium chloride
2. KNO₃ potassium nitrate
3. K₂SO₄ potassium sulfate
4. CuSO₄ copper sulfate
Which salt is the 2nd most soluble at 59^oC ? [7h-24]
1. NaCl sodium chloride
2. KNO₃ potassium nitrate
3. K₂SO₄ potassium sulfate
4. CuSO₄ copper sulfate
Which salt changes most in solubility with increase in temperature? [7h-25]
1. KNO₃ potassium nitrate
2. NaCl sodium chloride
3. K₂SO₄ potassium sulfate
4. CuSO₄ copper sulfate
Which salt changes least in solubility with increase in temperature? [7h-26]
1. KNO₃ potassium nitrate
2. NaCl sodium chloride
3. K₂SO₄ potassium sulfate
4. CuSO₄ copper sulfate
What is the solubility of potassium nitrate (KNO₃) in g/100g water at 40⁰C ? [7h-27]
1. 26
2. 60
3. 61
4. 28
What is the solubility of copper sulfate (CuSO₄) in g/100g water at 63⁰C ? [7h-28]
1. 88
2. 90
3. 44
4. 42
What is the solubility of potassium sulfate (K₂SO₄) in g/100g water at 56⁰C ? [7h-29]
1. 18
2. 20
3. 14
4. 22
At what temperature, in ^oC, is the solubility of potassium nitrate (KNO₃) 26g per 100g of water? [7h-30]
1. 13
2. 15
3. 2
4. 4
At what temperature, in ^oC, is the solubility of copper sulfate (CuSO₄) 54g per 100g of water? [7h-31]
1. 96
2. 80
3. 78
4. 98
At what temperature, in ^oC, is the solubility of potassium nitrate (KNO₃) 92g per 100g of water? [7h-32]
1. 56
2. 38
3. 36
4. 54
The process illustrated is called? [7h-33]
1. distillation
2. fermentation
3. filtration
4. sedimentation
In the process illustrated, the change from liquid to vapour is called? [7h-34]
1. distillation
2. evaporation
3. condensation
4. fractionation
In the process illustrated, the change from vapour to liquid is called? [7h-35]
1. distillation
2. evaporation
3. condensation
4. fractionation
In the process illustrated, any dissolved solids will not distil over because they have? [7h-36]
1. too low a boiling point
2. too low a melting point
3. too high a melting point
4. too high a boiling point
The separation process illustrated is called? [7h-37]
1. chromatography
2. distillation
3. filtration
4. radiography
The separation process result illustrated is called the? [7h-38]
1. distillate
2. chromatogram
3. filtrate
4. evaporate
The chromatography separation shows that mixture 6? [7h-39]
1. contains no purple or red
2. contains four colours
3. contains no green or purple
4. only contains blue and red
The chromatography separation shows that mixture 6? [7h-40]
1. contains no green or red
2. contains two colours
3. contains no brown or purple
4. contains blue, brown and red
Which is the fastest way to dissolve a solid in a liquid? [7h-41]
1. heat and stir the liquid and solid mixture
2. put lots of the solid in the liquid
3. put a little solid in a lot of the liquid
4. stir equal amounts of solid and liquid vigorously
Which is the best method to separate coloured substances? [7h-42]
1. distillation
2. chromatography
3. filtration
4. evaporation
If 100 cm³ of saturated potassium nitrate (KNO₃) solution was cooled from 60^oC to 20^oC, what mass of potassium nitrate crystals will form? [7h-43]
1. 70g
2. 78g
3. 74g
4. 82g
If 100 cm³ of saturated copper sulfate (CuSO₄) solution was cooled from 100^oC to 30^oC, what mass of blue copper sulfate crystals will form? [7h-44]
1. 52g
2. 48g
3. 60g
4. 56g
Which corresponds to the particle picture shown? [7h-45]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-46]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-47]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-48]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-49]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-50]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-51]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-52]
1. a pure liquid
2. a solution
3. pure crystals
4. impure crystals
What temperature does the Celsius thermometer read in ^oC ? [7h-53]
1. 36
2. 34
3. 44
4. 35.5
What temperature does the Celsius thermometer read in ^oC ? [7h-54]
1. 3
2. -7
3. 7
4. -3
What temperature does the Celsius thermometer read in ^oC ? [7h-55]
1. 101
2. 102
3. 101.5
4. 103
What temperature does the Celsius thermometer read in ^oC ? [7h-56]
1. 46
2. 47
3. 53.5
4. 46.5
What temperature does the Celsius thermometer read in ^oC ? [7h-57]
1. 132
2. 144
3. 126
4. 131
What temperature does the Celsius thermometer read in ^oC ? [7h-58]
1. 46.5
2. 53
3. 51.5
4. 63.5
What temperature does the Celsius thermometer read in ^oC ? [7h-59]
1. 203
2. 201.5
3. 206
4. 227
What temperature does the Celsius thermometer read in ^oC ? [7h-60]
1. 68.5
2. 81.5
3. 76
4. 77
In this process the change from liquid to vapour is called? [7h-61]
1. boiling
2. distilling
3. condensing
4. fractionating
The process to get pure salt from rock salt is shown in the diagram.
Which of the following would be described as impure? [7h-62]
1. water
2. rock salt
3. crystallised salt
4. salt solution
The process to get pure salt from rock salt is shown in the diagram.
Which of the following would be described as a mixture? [7h-63]
1. water
2. crystallised salt
3. rock salt
4. steam
The process to get pure salt from rock salt is shown in the diagram.
Which of the following would be described as a 'suspension'? [7h-64]
1. the evaporating water
2. the crystallising salt
3. the insoluble solids settling out
4. stirred water and fine sand particles
Which of the words listed goes along with the phrase .... [7h-65]
'explaining something we observed'?
1. interpretation
2. description
3. evaluation
4. prediction
Which of the words listed goes along with the phrase .... [7h-66]
'how we did the experiment'?
1. interpretation
2. description
3. evaluation
4. prediction
Which of the words listed goes along with the phrase .... [7h-67]
'how successful was our experiment'?
1. interpretation
2. description
3. evaluation
4. prediction
Which of the words listed goes along with the phrase .... [7h-68]
'what might happen in our experiment'?
1. interpretation
2. description
3. evaluation
4. prediction
Which corresponds to the particle picture shown? [7h-69]
1. a mixture of liquids
2. pure liquid
3. pure crystals
4. impure crystals
Which corresponds to the particle picture shown? [7h-70]
1. a pure liquid
2. mixture of liquids
3. pure crystals
4. impure crystals
The process to get pure salt from rock salt is shown in the diagram.
Which of the following would be described a 'sediment'? [7h-71]
1. the evaporating water
2. the crystallising salt
3. the insoluble solids settling out
4. stirred water and fine sand particles
Apparatus number 1 is called a? [7h-72]
1. thermometer
2. magnetic stirrer
3. diddler
4. stirring rod
Apparatus number 2 is called a? [7h-73]
1. beaker
2. conical flask
3. boiling flask
4. evaporating dish
Apparatus number 3 is called a? [7h-74]
1. Buchner burner
2. bunsen burner
3. gas burner
4. natural burner
Apparatus number 4 is called a? [7h-75]
1. filter sieve
2. filter pump
3. filter funnel
4. filteriser
Apparatus number 5 is called a? [7h-76]
1. chromatography paper
2. sieve paper
3. sediment paper
4. filter paper
Apparatus number 6 is called a? [7h-77]
1. evaporating dish
2. boiling basin
3. cooking basin
4. boiling dish
Apparatus number 7 is called a? [7h-78]
1. calibrated beaker
2. measuring cylinder
3. conical cylinder
4. measuring flask
The diagram shows the results of a chromatography investigation into the colours extracted from sweets. From the results you can say? [7h-79]
1. brown is made of blue, green and yellow colours
2. purple is made of green and red colours
3. blue, red and yellow are each made up of just one colour
4. green is made of blue and red colours
The diagram shows the results of a chromatography investigation into the colours extracted from sweets. From the results you can say? [7h-80]
1. brown is made of blue, green and yellow colours
2. purple is made of green and red colours
3. blue, green and red are each made up of just one colour
4. green is made of blue and yellow colours
The diagram shows the results of a chromatography investigation into the colours extracted from sweets. From the results you can say? [7h-81]
1. brown is made of blue, red and yellow colours
2. purple is made of green and red colours
3. blue, green and red are each made up of just one colour
4. green is made of blue and red colours
The diagram shows the results of a chromatography investigation into the colours extracted from sweets. From the results you can say? [7h-82]
1. brown is made of blue, green and yellow colours
2. purple is made of blue and red colours
3. blue, green and red are each made up of just one colour
4. green is made of blue and red colours
The diagram shows the results of a chromatography investigation into the colours extracted from sweets. From the results you can say? [7h-83]
1. brown is made of blue and yellow colours
2. purple is made of red and yellow colours
3. brown is made of green and red colours
4. green is made of blue and red colours
The diagram shows the results of a chromatography investigation into the colours extracted from sweets. From the results you can say? [7h-84]
1. brown is made of green and yellow colours
2. purple is made of red and yellow colours
3. green is made of blue and red colours
4. brown is made of purple and yellow colours
Which of these can be described as 'soluble in water'? [7h-85]
1. sugar
2. glass
3. plastic
4. sand
Which of these can be described as 'insoluble in water'? [7h-86]
1. sugar
2. glass
3. salt
4. copper sulfate
At which temperature in ^oC does the solubility of sodium chloride equal that of potassium nitrate? [7h-87]
1. 55
2. 20
3. 23
4. 30
At which temperature in ^oC does the solubility of sodium chloride equal that of copper sulfate? [7h-88]
1. 51
2. 35
3. 23
4. 55
Which of these can make a solid substance dissolve faster in a liquid? [7h-89]
1. heat the solid-liquid mixture
2. use larger lumps of solid in a small volume of liquid
3. let the large undissolved pieces settle out
4. use a little solid at a time to a large volume of liquid
Which of these can make a solid substance dissolve faster in a liquid? [7h-90]
1. cool the solid-liquid mixture
2. use smaller lumps of solid
3. let the large undissolved pieces settle out
4. use a little solid at a time to a large volume of liquid
Which of these can make a solid substance dissolve faster in a liquid? [7h-89]
1. cool the solid-liquid mixture
2. use larger lumps of solid in a small volume of liquid
3. stir the mixture regularly
4. use a little solid at a time to a large volume of liquid
Which of these is NOT a good idea to make a solid substance dissolve faster in a flammable liquid? [7h-92]
1. use a little solid at a time to a large volume of liquid
2. use larger lumps of solid in a small volume of liquid
3. let the large undissolved pieces settle out
4. heat the solid-liquid mixture
What mass of copper sulfate will dissolve in 50g of water at 30^oC ? [7h-93]
1. 12g
2. 24g
3. 48g
4. 6g
What mass of potassium nitrate will dissolve in 200g of water at 20^oC ? [7h-94]
1. 32g
2. 64g
3. 16g
4. 6g
What is the minimum mass of water you can completely dissolve 28g of copper sulfate in at 80^oC ? [7h-95]
1. 100g
2. 200g
3. 50g
4. 25g
What is the minimum mass of water you can completely dissolve 36g of potassium sulfate in at 60^oC ? [7h-95]
1. 100g
2. 25g
3. 50g
4. 200g
Which method shown in the diagram is filtration? [7h-97]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram removes excess liquid? [7h-98]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram is distillation? [7h-99]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram is chromatography? [7h-100]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram is used to separate grit particles from muddy water? [7h-101]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram is used to separate copper sulfate crystals from its solution in water? [7h-102]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram is used to separate pure water from seawater? [7h-103]
1. method 1
2. method 2
3. method 3
4. method 4
Which method shown in the diagram is used to analyse a forged cheque? [7h-104]
1. method 1
2. method 2
3. method 3
4. method 4
Which is a TRUE statement about water solubility, and purifying rock salt by dissolving, filtering, evaporating and crystallising? [7h-105]
1. most compounds are more soluble at a higher temperature than a lower temperature
2. solubility data for water are given between 0-100^oC because that's the only temperature range we use in laboratory experiments
3. salt particles pass through the filter paper because they are attracted to water molecules
4. one reason why the mass of pure salt crystals obtained is less than the original rock salt is because of losses by evaporation
Which is a TRUE statement about water solubility, and purifying rock salt by dissolving, filtering, evaporating and crystallising? [7h-106]
1. most compounds are less soluble at a higher temperature than a lower temperature
2. solubility data for water are given between 0-100^oC because its limited by the freezing and boiling point of water
3. salt particles pass through the filter paper because they are attracted to water molecules
4. one reason why the mass of pure salt crystals obtained is less than the original rock salt is because of losses by evaporation
Which is a TRUE statement about water solubility, and purifying rock salt by dissolving, filtering, evaporating and crystallising? [7h-107]
1. most compounds are less soluble at a higher temperature than a lower temperature
2. solubility data for water are given between 0-100^oC because that's the only temperature range we use in laboratory experiments
3. salt particles pass through the filter paper because they are so small compared to the pores of the paper
4. one reason why the mass of pure salt crystals obtained is less than the original rock salt is because of losses by evaporation
Which is a TRUE statement about water solubility, and purifying rock salt by dissolving, filtering, evaporating and crystallising? [7h-108]
1. most compounds are less soluble at a higher temperature than a lower temperature
2. solubility data for water are given between 0-100^oC because that's the only temperature range we use in laboratory experiments
3. salt particles pass through the filter paper because they are attracted to water molecules
4. one reason why the mass of pure salt crystals obtained is less than the original rock salt is because of the filtered impurities
Which is a TRUE statement about water solubility, and purifying rock salt by dissolving, filtering, evaporating and crystallising? [7h-109]
1. one reason why the mass of pure salt crystals obtained is less than the original rock salt is because liquid is left in the beaker or on the filter paper
2. solubility data for water are given between 0-100^oC because that's the only temperature range we use in laboratory experiments
3. salt particles pass through the filter paper because they are attracted to water molecules
4. most compounds are less soluble at a higher temperature than a lower temperature
Which statement is TRUE about the distillation process shown in the diagram, to purify water from blue ink? [7h-110]
1. some dissolved salts can distil over
2. the thermometer at Y will register 100^oC
3. the state change at X is called condensation
4. the state change in Z is called evaporation
Which is TRUE about the distillation process shown in the diagram, to purify water from blue ink? [7h-111]
1. some dissolved salts can distil over
2. the thermometer at Y will only register 90^oC
3. the state change at X is called boiling
4. the state change in Z is called evaporation
Which is TRUE about the distillation process shown in the diagram, to purify water from blue ink? [7h-112]
1. some dissolved salts can distil over
2. the thermometer at Y will only register 90^oC
3. the state change at X is called crystallisation
4. the state change in Z is called condensation
Apparatus number 6 is called a? [7h-113]
1. crystallising dish
2. boiling basin
3. cooking basin
4. boiling dish
The process to get pure salt from rock salt is shown in the diagram. Which of the following would be described as the filtrate? [7h-114]
1. pure water
2. clear salt solution
3. pure crystallised salt
4. rock salt particles
Which word means the 'smallest particle of a substance'? [8e-1]
1. atom
2. molecule
3. symbol
4. formula
Which word means 'a larger particle formed by bonding together the smallest particles of substances'? [8e-2]
1. atom
2. molecule
3. symbol
4. formula
Which word means the 'shorthand for a chemical element'? [8e-3]
1. atom
2. molecule
3. symbol
4. formula
Which word means 'a summary of the number of atoms of each element in a compound'? [8e-4]
1. atom
2. molecule
3. symbol
4. formula
Which of these is an element? [8e-5]
1. Cu
2. CO
3. MgO
4. H₂O
Which of these is an element? [8e-6]
1. CoO
2. Mg
3. CO₂
4. NaCl
Which of these is an element? [8e-7]
1. CoO
2. MgS
3. O₂
4. NaCl
Which of these is an element? [8e-8]
1. KCl
2. MgS
3. F₂O
4. P₄
Which of these is a compound? [8e-9]
1. CO₂
2. Co
3. F₂
4. P₄
Which of these is a compound? [8e-10]
1. Co
2. MgO
3. F₂
4. P₄
Which of these is a compound? [8e-11]
1. Fe
2. Co
3. CO
4. H₂
Which of these is a compound? [8e-12]
1. Fe
2. Co
3. Ca
4. H₂O
Which of these is an element? [8e-13]
1. nitrogen
2. carbon monoxide
3. water
4. petrol
Which of these is an element? [8e-14]
1. nitrogen monoxide
2. magnesium
3. water
4. alcohol
Which of these is an element? [8e-15]
1. water
2. magnesium oxide
3. bromine
4. alcohol
Which of these is an element? [8e-16]
1. water
2. magnesium oxide
3. brass
4. copper
Which of these is a compound? [8e-17]
1. carbon monoxide
2. magnesium
3. brass
4. bromine
Which of these is a compound? [8e-18]
1. carbon
2. water
3. copper
4. bromine
Which of these is a compound? [8e-19]
1. carbon
2. phosphorus
3. copper oxide
4. bromine
Which of these is a compound? [8e-20]
1. brass (alloy)
2. phosphorus (red)
3. copper (roofing)
4. ethanol (alcohol)
Which of these words means 'one type of atom only'? [8e-21]
1. element
2. compound
3. reactant
4. product
Which word means 'two or more types of atom combined together'? [8e-22]
1. element
2. compound
3. reactant
4. product
Which word means 'what you start with in a chemical reaction'? [8e-23]
1. element
2. compound
3. reactant
4. product
Which word means 'the result of a chemical reaction'? [8e-24]
1. element
2. compound
3. reactant
4. product
Which is the chemical symbol for carbon? [8e-25]
1. C
2. Ca
3. Cr
4. Co
Which is the chemical symbol for calcium? [8e-26]
1. C
2. Ca
3. Cu
4. Co
Which is the chemical symbol for copper? [8e-27]
1. CO
2. Ca
3. Cu
4. Co
Which is the chemical symbol for cobalt? [8e-28]
1. CO
2. Ca
3. Cu
4. Co
Which picture represents a mixture of two compound molecules? [8e-29]
Which picture represents molecules of a pure element? [8e-30]
Which picture represents a mixture of molecules of two elements? [8e-31]
Which picture represents a molecule mixture of two elements and one compound? [8e-32]
Which picture represents a mixture of atoms of an element and molecules of a compound? [8e-33]
Which picture represents atoms of a pure element? [8e-34]
Which picture represents a mixture of atoms of an element and molecules of another element? [8e-35]
Which picture represents molecules of a pure compound? [8e-36]
Which picture represents a mixture of atoms of two elements? [8e-37]
Which picture represents a mixture of molecules of an element and molecules of a compound? [8e-38]
Which picture best represents pure water? [8e-39]
Which picture best represents oxygen dissolved in pure water? [8e-40]
Which is likely to consist of one element? [8e-41]
1. gold ring
2. duralumin hi fi chassis
3. bronze statue
4. pure quartz crystal
Which is likely to consist of one element? [8e-42]
1. duralumin hi fi chassis
2. aluminium pan
3. bronze statue
4. pure quartz crystal
Which is likely to consist of one element? [8e-43]
1. duralumin hi fi chassis
2. bronze statue
3. yellow rock sulfur
4. pure quartz crystal
Which is likely to consist of one element? [8e-44]
1. brass rivet
2. bronze statue
3. pure quartz crystal
4. silver plate
Which statement is TRUE ? [8e-45]
1. most elements are metals
2. most metals are magnetic
3. there are about 1000 different elements in the Periodic Table
4. there are no liquid elements at room temperature and pressure
Which statement is TRUE ? [8e-46]
1. most elements are non-metals
2. most metals are non-magnetic
3. there are about 1000 different elements in the Periodic Table
4. there are no liquid elements at room temperature and pressure
Which statement is TRUE ? [8e-47]
1. most elements are non-metals
2. most metals are magnetic
3. there are about 100 different elements in the Periodic Table
4. there are no liquid elements at room temperature and pressure
Which statement is TRUE ? [8e-48]
1. most elements are non-metals
2. most metals are magnetic
3. there are about 1000 different elements in the Periodic Table
4. there are a few liquid elements at room temperature and pressure
Which element is a liquid metal at room temperature and pressure? [8e-49]
1. mercury
2. bromine
3. phosphorus
4. nickel
Which element is a liquid non-metal at room temperature and pressure? [8e-50]
1. mercury
2. bromine
3. oxygen
4. nickel
Which element of the Periodic Table is a colourless non-metal gas? [8e-51]
1. mercury
2. bromine
3. nitrogen
4. nickel
Which element of the Periodic Table is a solid magnetic metal? [8e-52]
1. mercury
2. bromine
3. sulfur
4. nickel
The product of burning magnesium in air is? [8e-53]
1. magnesium oxide
2. oxygen magneside
3. magnesium hydroxide
4. milk of magnesia
The product of heating an iron-sulfur mixture is called? [8e-54]
1. iron sulfate
2. iron sulfide
3. sulfuric iron
4. sulfide of iron
The product of heating sodium in chlorine is called? [8e-55]
1. sodium chlorate
2. chloro sodium
3. sodium chloride
4. chloric sodiumate
The product of burning hydrogen in air is? [8e-56]
1. oxohydrogen
2. hydrogen peroxide
3. hydrogen hydroxide
4. water
What is formed when carbon burns in excess air? [8e-57]
1. carbon dioxide
2. carbon oxide
3. carbon monoxide
4. oxygen carbonate
What is formed when silvery zinc is heated in green chlorine gas? [8e-58]
1. zinc chlorate
2. zinc chloride
3. chlorozincate
4. chloride of zinc
What is formed after heating a sulfur-copper mixture? [8e-59]
1. copper sulfate
2. sulfonium cuprate
3. copper sulfide
4. sulfate of copper
When copper is heated in a bunsen flame it forms a black solid.
What is the name of the compound formed? [8e-60]
1. copper nitride
2. copper hydroxide
3. copper carbide
4. copper oxide
The formula for sulfuric acid is H₂SO₄.
What is the ratio of H : S : O atoms in the molecule? [8e-61]
1. 2 : 1 : 4
2. 1 : 2 : 4
3. 2 : 4 : 4
4. 2 : 2 : 4
The formula for calcium carbonate is CaCO₃.
What is the ratio of Ca : C : O atoms in the formula? [8e-62]
1. 1 : 3 : 3
2. 1 : 1 : 3
3. 3 : 3 : 1
4. 3 : 1 : 1
The formula for sodium sulfate is Na₂S₂O₃.
What is the ratio of Na : S : O atoms in the formula? [8e-63]
1. 3 : 2 : 2
2. 3 : 3 : 2
3. 2 : 2 : 3
4. 2 : 3 : 3
The formula for copper sulfate is CuSO₄.
What is the ratio of Cu : S : O atoms in the formula? [8e-64]
1. 1 : 4 : 4
2. 4 : 4 : 4
3. 4 : 3 : 4
4. 1 : 1 : 4
Which of the following reactions involves the chemical change ...
two elements ==> compound? [8e-65]
1. zinc + sulfur ==> zinc sulfide
2. oxygen + copper sulfide ==> copper sulfate
3. carbon dioxide + calcium hydroxide ==> calcium carbonate + water
4. water ==> hydrogen + oxygen
Which of the following reactions involves the chemical change ...
element + compound ==> compound? [8e-66]
1. zinc + sulfur ==> zinc sulfide
2. oxygen + copper sulfide ==> copper sulfate
3. carbon dioxide + calcium hydroxide ==> calcium carbonate + water
4. water ==> hydrogen + oxygen
Which of the following reactions involves the chemical change ...
two compounds ==> two compounds? [8e-67]
1. zinc + sulfur ==> zinc sulfide
2. oxygen + copper sulfide ==> copper sulfate
3. carbon dioxide + calcium hydroxide ==> calcium carbonate + water
4. water ==> hydrogen + oxygen
Which of the following reactions involves the chemical change ...
compound ==> two elements? [8e-68]
1. zinc + sulfur ==> zinc sulfide
2. oxygen + copper sulfide ==> copper sulfate
3. carbon dioxide + calcium hydroxide ==> calcium carbonate + water
4. water ==> hydrogen + oxygen
Which of the following is the chemical symbol for the element potassium? [8e-69]
1. K
2. Pt
3. Po
4. P
Which of the following is the chemical symbol for the element nitrogen? [8e-70]
1. No
2. N
3. Ne
4. Ni
Which of the following is the chemical symbol for the element magnesium? [8e-71]
1. Mn
2. Mo
3. Mg
4. Md
Which of the following is the chemical symbol for the element aluminium? [8e-72]
1. Am
2. Ar
3. As
4. Al
Which element is a solid magnetic metal at room temperature? [8e-73]
1. iron
2. sulfur
3. mercury
4. oxygen
Which element is a yellow solid non-metal room temperature? [8e-74]
1. iron
2. sulfur
3. mercury
4. oxygen
Which element is the only liquid metal at room temperature? [8e-75]
1. iron
2. sulfur
3. mercury
4. oxygen
Which element is a colourless gaseous non-metal at room temperature? [8e-76]
1. iron
2. sulfur
3. mercury
4. oxygen
Which element is a green non-metal gas? [8e-77]
1. chlorine
2. aluminium
3. bromine
4. sodium
Which element is a silvery grey solid metal? [8e-78]
1. chlorine
2. aluminium
3. bromine
4. sodium
Which element is a dark red liquid non-metal at room temperature? [8e-79]
1. chlorine
2. aluminium
3. bromine
4. sodium
Which element is a very soft silvery solid metal at room temperature? [8e-80]
1. chlorine
2. aluminium
3. bromine
4. sodium
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-81]
1. metals are good conductors of heat
2. metals have low melting and boiling points
3. non-metals are good conductors of electricity
4. non-metals have high densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-82]
1. metals are poor conductors of heat
2. metals have high melting and boiling points
3. non-metals are good conductors of electricity
4. non-metals have high densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-83]
1. metals are poor conductors of heat
2. metals have low melting and boiling points
3. non-metals are poor conductors of electricity
4. non-metals have high densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-84]
1. metals are poor conductors of heat
2. metals have low melting and boiling points
3. non-metals are good conductors of electricity
4. non-metals have low densities
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-85]
1. metals are good conductors of electricity
2. metals have low densities
3. non-metals are good conductors of heat
4. non-metals have high melting and boiling points
Which statement is USUALLY TRUE when comparing the physical properties of metallic and non-metallic elements? [8e-86]
1. metals are poor conductors of electricity
2. metals have high densities
3. non-metals are good conductors of heat
4. non-metals have high melting and boiling points
Which statement is USUALLY TRUE about metallic and non-metallic elements? [8e-87]
1. metals are poor conductors of electricity
2. metals have low densities
3. non-metals are poor conductors of heat
4. non-metals have high melting and boiling points
Which statement is USUALLY TRUE about metallic and non-metallic elements? [8e-88]
1. metals are poor conductors of electricity
2. metals have low densities
3. non-metals are good conductors of heat
4. non-metals have low melting and boiling points
Which is the chemical symbol for the element iron? [8e-89]
1. Fe
2. F
3. Ir
4. I
Which is the chemical symbol for the element zinc? [8e-90]
1. ZnO
2. Zn
3. ZnS
4. ZrC
Which is the chemical symbol for the element chlorine? [8e-91]
1. Co
2. Cr
3. Cl
4. Ce
Which is the chemical symbol for the element sodium? [8e-92]
1. S
2. Sm
3. Sn
4. Na
Which statement is TRUE about the Periodic Table of Elements? [8e-93]
1. metals are mostly on the left and in the middle
2. all non-metals are in the middle
3. there are about 1000 different elements
4. about 1/2 of the elements are metals
Which statement is TRUE about the Periodic Table of Elements? [8e-94]
1. metals are mostly in the middle and on the right
2. all non-metals are on the right
3. there are about 500 different elements
4. about 1/4 of the elements are metals
Which statement is TRUE about the Periodic Table of Elements? [8e-95]
1. metals are mostly in the middle and on the right
2. all non-metals are on the left
3. about 1/4 are non-metals
4. about 1/2 of the elements are metals
Which statement is TRUE about the Periodic Table of Elements? [8e-96]
1. metals are mostly in the middle and on the right
2. all non-metals are in the middle
3. there are about 50 different non-metals
4. about 3/4 of the elements are metals
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-97]
1. almost all metals are silvery shiny solids
2. most non-metallic elements are dull solids
3. most metals like aluminium and copper are magnetic
4. it is impossible for a non-metal to be magnetic
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-98]
1. only a few metals like aluminium and silver are silvery shiny solids
2. there are only a few non-metallic elements which are dull solids
3. most metals like aluminium and copper are magnetic
4. it is impossible for a non-metal to be magnetic
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-99]
1. only a few metals like aluminium and silver are silvery shiny solids
2. most non-metallic elements are dull solids
3. a few metals like iron and nickel are magnetic
4. it is impossible for a non-metal to be magnetic
Which statement is TRUE about the elements of the Periodic Table of Elements at room temperature? [8e-100]
1. only a few metals like aluminium and silver are silvery shiny solids
2. most non-metallic elements are dull solids
3. most metals like aluminium and copper are magnetic
4. it is possible for a non-metal to be magnetic
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-1]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
has a fixed melting point? true or false? true or false? true or false?
1. true, true, false
2. true, false, false
3. false, false, true
4. false, true, true
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-2]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
has only one type of atom? true or false? true or false? true or false?
1. true, true, false
2. true, false, false
3. false, false, true
4. false, true, true
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-3]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
always has the same composition? true or false? true or false? true or false?
1. false, true, true
2. true, false, false
3. true, true, false
4. false, false, true
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-4]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
has a definite chemical symbol or formula? true or false? true or false? true or false?
1. false, false, true
2. true, false, true
3. false, true, false
4. true, true, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-5]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
has no fixed boiling point? true or false? true or false? true or false?
1. false, false, true
2. true, false, true
3. false, true, false
4. true, true, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-6]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
is easily separated into different substances? true or false? true or false? true or false?
1. false, true, true
2. false, false, true
3. true, true, false
4. true, false, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-7]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
has more than one type of atom? true or false? true or false? true or false?
1. true, true, false
2. false, false, true
3. false, true, true
4. true, false, false
Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-8]
STATEMENT about .... ELEMENT COMPOUND MIXTURE
there are only about 100 of them? true or false? true or false? true or false?
1. true, true, false
2. false, false, true
3. false, true, true
4. true, false, false
/What is the formula of the molecule? [8f-9]
1. C₂H₆O
2. ₂C₆HO
3. C₃H₆
4. C₆H₂O
What is the formula of the molecule? [8f-10]
1. C₅H₆I₂
2. C₃H₆Cl₂
3. C₆H₃Cl₂
4. C₂H₆Cl₃
What is the formula of the molecule? [8f-11]
1. C₈H₃
2. ₃C₈H
3. C₃H₈
4. C₃H₆
What is the formula of the molecule? [8f-12]
1. C₂H₆O₃
2. ₃C₆H₂O
3. C₅H₆O
4. C₃H₆O₂
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-13]
1. the boiling point is higher than pure water
2. the freezing point is higher than pure water
3. the boiling point decreases the longer the solution is boiled
4. the solution becomes less concentrated the longer it is boiled
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-14]
1. the boiling point is lower than pure water
2. the freezing point is lower than pure water
3. the boiling point decreases the longer the solution is boiled
4. the solution becomes less concentrated the longer it is boiled
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-15]
1. the boiling point is lower than pure water
2. the freezing point is higher than pure water
3. the boiling point increases the longer the solution is boiled
4. the solution becomes less concentrated the longer it is boiled
When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-16]
1. the boiling point is lower than pure water
2. the freezing point is higher than pure water
3. the boiling point decreases the longer the solution is boiled
4. the solution becomes more concentrated the longer it is boiled
Which order of the three words matches the three substances iron, iron oxide, steel ?, ?, ? [8f-17]
1. element, compound, mixture
2. compound, element, mixture
3. mixture, compound, element
4. element, mixture, compound
Which order of the three words matches the three substances salt, sodium, seawater ?, ?, ? [8f-18]
1. element, compound, mixture
2. compound, element, mixture
3. mixture, compound, element
4. element, mixture, compound
Which order of the three words matches the three substances brass, copper oxide, zinc ?, ?, ? [8f-19]
1. element, compound, mixture
2. compound, element, mixture
3. mixture, compound, element
4. element, mixture, compound
Which order of the three words matches the three substances hydrogen, petrol, water ?, ?, ? [8f-20]
1. element, compound, mixture
2. compound, element, mixture
3. mixture, compound, element
4. element, mixture, compound
Which order of the three words matches the three substances carbon dioxide, coal, carbon ?, ?, ? [8f-21]
1. compound, mixture, element
2. mixture, compound, element
3. element, mixture, compound
4. compound, element, mixture
Which order of the three words matches the three substances plaster of Paris, gypsum, flowers of sulfur ?, ?, ? [8f-22]
1. compound, mixture, element
2. mixture, compound, element
3. element, mixture, compound
4. compound, element, mixture
Which order of the three words matches the three substances chlorine, rock salt, sodium chloride ?, ?, ? [8f-23]
1. compound, mixture, element
2. mixture, compound, element
3. element, mixture, compound
4. compound, element, mixture
Which order of the three words matches the three substances sodium hydroxide, oxygen, bleach ?, ?, ? [8f-24]
1. compound, mixture, element
2. mixture, compound, element
3. element, mixture, compound
4. compound, element, mixture
Which two words apply to the substance nitrogen? [8f-25]
1. gas, element
2. liquid, compound
3. solid, mixture
4. gas, compound
Which two words apply to the substance copper sulfate? [8f-26]
1. gas, element
2. solid, compound
3. solid, mixture
4. gas, compound
Which two words apply to the substance wood? [8f-27]
1. gas, element
2. solid, compound
3. solid, mixture
4. gas, compound
Which two words apply to the substance sulfur dioxide? [8f-28]
1. gas, element
2. solid, compound
3. solid, mixture
4. gas, compound
Which two words apply to the substance vinegar? [8f-29]
1. liquid, mixture
2. solid, element
3. gas, mixture
4. liquid, element
Which two words apply to the substance magnesium? [8f-30]
1. liquid, mixture
2. solid, element
3. gas, mixture
4. liquid, element
Which two words apply to the substance air? [8f-31]
1. liquid, mixture
2. solid, element
3. gas, mixture
4. liquid, element
Which two words apply to the substance mercury? [8f-32]
1. liquid, mixture
2. solid, element
3. gas, mixture
4. liquid, element
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-33]
1. at the start they are a mixture
2. at the end they are a mixture
3. at the start they cannot be separated with a magnet
4. at the end they can be separated with a magnet
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-34]
1. at the start they are a compound
2. at the end they are a compound
3. at the start they cannot be separated with a magnet
4. at the end they can be separated with a magnet
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-35]
1. at the start they are a compound
2. at the end they are a mixture
3. at the start they can be separated with a magnet
4. at the end they can be separated with a magnet
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-36]
1. at the start they are a compound
2. at the end they are a mixture
3. at the start they cannot be separated with a magnet
4. at the end they cannot be separated with a magnet
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-37]
1. the colour change suggests a chemical reaction has happened overall
2. FeS describes them at the start, Fe + S describes them at the end
3. at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product
4. the red glow without heating shows overall a physical change has happened to the mixture when cool
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-38]
1. the colour change suggests a physical change has happened overall
2. Fe + S describes them at the start, FeS describes them at the end
3. at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product
4. the red glow without heating shows overall a physical change has happened to the mixture when cool
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-39]
1. the colour change suggests a physical change has happened overall
2. FeS describes them at the start, Fe + S describes them at the end
3. at the start, acid will act on the iron forming hydrogen and hydrogen sulfide gas is formed with acid and the dark-grey solid product
4. the red glow without heating shows overall a physical change has happened to the mixture when cool
Silvery grey iron filings are added to yellow sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-40]
1. the colour change suggests a physical change has happened overall
2. FeS describes them at the start, Fe + S describes them at the end
3. at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product
4. the red glow without heating suggests overall a chemical change has happened to the mixture when cool
Which method of separation is best to use for separating petrol from crude oil? [8f-41]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for obtaining salt from seawater? [8f-42]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for removing silt from muddy water? [8f-43]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for investigating the composition of food dyes in sweet colours? [8f-44]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for purifying water containing small quantities of dissolved minerals? [8f-45]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for obtaining fertiliser crystals from neutralising nitric acid solution with the alkali ammonia? [8f-46]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for separating a solid product* formed from mixing two solutions? (* called a precipitate) [8f-47]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which method of separation is best to use for checking which ink was used in a forged cheque? [8f-48]
1. distillation
2. evaporation
3. filtration
4. chromatography
Which particle is a compound made up of three elements? [8f-49]
1. 8
2. 2
3. 4
4. 7
Which particle is a compound made up of three elements? [8f-50]
1. 2
2. 9
3. 4
4. 7
Which particle is an element made up of single atoms? [8f-51]
1. 1
2. 6
3. 3
4. 5
Which particle is a compound made up of two elements? [8f-52]
1. 3
2. 5
3. 6
4. 1
Which particle is a compound made up of two elements? [8f-53]
1. 7
2. 8
3. 6
4. 3
Which particle is a molecule made of 4 atoms? [8f-54]
1. 7
2. 6
3. 8
4. 2
Which particle is formed when two different colourless gases chemically combine? [8f-55]
1. 7
2. 6
3. 4
4. 2
Which particle is formed when a black solid and a colourless gas chemically combine? [8f-56]
1. 9
2. 6
3. 4
4. 2
[9e-1] Complete the word equation: metal + acid ==> ?
1. salt + hydrogen
2. salt + water
3. salt + water + carbon dioxide
4. salt + carbon dioxide
[9e-2] Complete the word equation: metal oxide + acid ==> ?
1. salt + hydrogen
2. salt + water
3. salt + water + carbon dioxide
4. salt + carbon dioxide
[9e-3] Complete the word equation: metal carbonate + acid ==> ?
1. salt + hydrogen
2. salt + water
3. salt + water + carbon dioxide
4. salt + carbon dioxide
[9e-4] Complete the word equation: metal hydroxide + acid ==> ?
1. salt + hydrogen
2. salt + water + carbon dioxide
3. salt + carbon dioxide
4. salt + water
The preparation of copper sulfate.
Which word applies to stages 1 and 2? [9e-5]
1. dissolving
2. filtration
3. evaporation
4. crystallisation
The preparation of copper sulfate.
Which word applies to stage 3? [9e-6]
1. dissolving
2. filtration
3. evaporation
4. crystallisation
The preparation of copper sulfate.
Which word applies to go from stage 3 to stage 4? [9e-7]
1. dissolving
2. filtration
3. evaporation
4. crystallisation
The preparation of copper sulfate.
Which word applies to the formation of the solid in stage 4? [9e-8]
1. dissolving
2. filtration
3. evaporation
4. crystallisation
The preparation of copper sulfate.
Why is the mixture heated in stage 2? [9e-9]
1. to speed up the solid dissolving
2. the starting solid only dissolves in hot acid
3. to increase the rate of evaporation
4. you can only get crystallisation from hot solutions
The preparation of copper sulfate.
Which is a suitable solid and solution to use for this preparation? [9e-10]
1. copper chloride and sodium sulfate solution
2. copper oxide and sulfuric acid
3. copper nitrate and sodium sulfate solution
4. copper carbonate and nitric acid
The preparation of copper sulfate.
Which is a suitable solid and solution to use for this preparation? [9e-11]
1. copper oxide and sodium sulfate solution
2. copper chloride and sulfuric acid
3. copper carbonate and sulfuric acid
4. copper nitrate and sodium sulfate solution
The preparation of copper nitrate.
Which is a suitable solid and solution to use for this preparation? [9e-12]
1. copper chloride and sodium nitrate solution
2. copper oxide and sodium nitrate solution
3. copper carbonate and sulfuric acid
4. copper oxide and nitric acid
Which four numbers a, b, c and d are required to balance the equation? [9e-13]
a Zn_(s) + b HCl_(aq) ==> c ZnCl_2(aq) + d H_2(g)
1. 1 2 1 1
2. 2 2 2 1
3. 2 1 1 2
4. 1 1 2 2
Which four numbers a, b, c and d are required to balance the equation? [9e-14]
a Fe_(s) + b H₂SO_4(aq) ==> c FeSO_4(aq) + d H_2(g)
1. 1 1 1 2
2. 1 1 1 1
3. 2 2 2 1
4. 2 1 2 2
[9e-15] Complete the word equation: iron + sulfuric acid ==> ?
1. iron sulfate + water
2. iron sulfite
3. iron sulfate + hydrogen
4. iron sulfate + carbon dioxide
[9e-16] Complete the word equation: copper oxide + sulfuric acid ==> ?
1. copper sulfate
2. copper sulfate + hydrogen
3. copper sulfite + oxygen
4. copper sulfate + water
Which five numbers a, b, c, d and e are required to balance the equation? [9e-17]
a CaCO_3(s) + b HCl_(aq) ==> c CaCl_2(aq) + d H₂O_(l) + e CO_2(g)
1. 1 2 1 1 1
2. 2 2 1 2 1
3. 1 1 1 1 1
4. 2 1 2 2 2
Which five numbers a, b, c, d and e are required to balance the equation? [9e-18]
a Na₂CO_3(s) + b HCl_(aq) ==> c NaCl_(aq) + d H₂O_(l) + e CO_2(g)
1. 1 4 4 2 2
2. 1 2 2 1 1
3. 2 2 4 2 2
4. 2 2 2 1 1
Which four numbers a, b, c and d are required to balance the equation? [9e-19]
a NaOH_(aq) + b HCl_(aq) ==> c NaCl_(aq) + d H₂O_(l)
1. 2 1 1 2
2. 1 2 2 1
3. 1 1 1 1
4. 1 2 2 1
Which four numbers a, b, c and d are required to balance the equation? [9e-20]
a Ca(OH)_2(aq) + b HCl_(aq) ==> c CaCl_2(aq) + d H₂O_(l)
1. 1 2 1 1
2. 2 2 2 1
3. 2 1 1 2
4. 1 2 1 2
Which four numbers a, b, c and d are required to balance the equation?[9e-21]
a Al(OH)_3(s) + b HCl_(aq) ==> c AlCl_3(aq) + d H₂O_(l)
1. 2 6 2 3
2. 1 6 2 6
3. 1 3 1 3
4. 2 3 2 3
[9e-22] Complete the word equation: magnesium carbonate + nitric acid ==> ?
1. magnesium nitrate + carbon dioxide
2. magnesium nitrite + hydrogen
3. magnesium nitrite + water
4. magnesium nitrate + water + carbon dioxide
Which four numbers a, b, c and d are required to balance the equation? [9e-23]
a MgO_(s) + b HCl_(aq) ==> c MgCl_2(aq) + d H₂O_(l)
1. 1 2 1 1
2. 1 1 1 1
3. 2 2 1 2
4. 1 4 1 2
Which four numbers a, b, c and d are required to balance the equation? [9e-24]
a Mg(OH)_2(s) + b H₂SO_4(aq) ==> c MgSO_4(aq) + d H₂O_(l)
1. 1 2 1 1
2. 1 1 1 2
3. 2 2 1 2
4. 1 4 1 2
9e-25] Complete the word equation: zinc + hydrochloric acid ==> ?
1. zinc chlorate + chlorine
2. zinc chloride + water
3. zinc chloride + hydrogen
4. zinc chlorate + carbon dioxide
[9e-26] Which four numbers a, b, c and d are required to balance the equation?
a KOH_(aq) + b H₂SO_4(aq) ==> c K₂SO_4(aq) + d H₂O_(l)
1. 1 2 1 1
2. 1 1 1 1
3. 2 2 1 2
4. 2 1 1 2
[9e-27] Which four numbers a, b, c and d are required to balance the equation?
a CuO_(s) + b H₂SO_4(aq) ==> c CuSO_4(aq) + d H₂O_(l)
1. 1 1 1 1
2. 1 2 1 1
3. 2 2 1 2
4. 1 4 1 2
[9e-28] Which four numbers a, b, c and d are required to balance the equation?
a CuO_(s) + b HNO_3(aq) ==> c Cu(NO₃)_2(aq) + d H₂O_(l)
1. 1 1 1 1
2. 1 2 1 1
3. 2 2 1 2
4. 1 4 1 2
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-29]
1. solid non-metallic elements are dull looking
2. metallic elements are poor conductors of heat
3. non-metallic elements are good conductors of electricity
4. metallic elements have low melting points
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-30]
1. solid non-metallic elements are shiny looking
2. metallic elements are good conductors of heat
3. non-metallic elements are good conductors of electricity
4. metallic elements have low melting points
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-31]
1. solid non-metallic elements are shiny looking
2. metallic elements are poor conductors of heat
3. non-metallic elements are poor conductors of electricity
4. metallic elements have low melting points
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-32]
1. solid non-metallic elements are shiny looking
2. metallic elements are poor conductors of heat
3. non-metallic elements are good conductors of electricity
4. metallic elements have high melting points
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-33]
1. non-metallic have low boiling points
2. metallic elements have a low density
3. solid non-metallic elements are strong
4. metallic elements are not easily bent into shape
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-34]
1. non-metallic have high boiling points
2. metallic elements have a high density
3. solid non-metallic elements are strong
4. metallic elements are not easily bent into shape
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-35]
1. non-metallic have high boiling points
2. metallic elements have a low density
3. solid non-metallic elements are weak or brittle
4. metallic elements are not easily bent into shape
Which of the following statements is generally TRUE about metallic and non-metallic elements of the Periodic Table? [9e-36]
1. non-metallic have high boiling points
2. metallic elements have a low density
3. solid non-metallic elements are strong
4. metallic elements are easily bent into shape
Which of the following elements is a non-metal but quite a good conductor of heat and electricity? [9e-37]
1. carbon
2. copper
3. iron
4. sulfur
Which of the following elements is a good conductor used in electrical wiring? [9e-38]
1. carbon
2. copper
3. iron
4. sulfur
Which of the following elements is a strong metal used to make steel for cans? [9e-39]
1. magnesium
2. copper
3. iron
4. gold
Which of the following elements has been used for thousands of years for jewellery because it doesn't tarnish easily? [9e-40]
1. sulfur
2. tin
3. iron
4. gold
Which element is used to 'galvanise' iron and steel to prevent rusting? [9e-41]
1. zinc
2. lead
3. silver
4. aluminium
Which element is very malleable and used in sealing roofs around chimneys or dormer windows? [9e-42]
1. zinc
2. lead
3. silver
4. aluminium
Which element is used for ornaments because it is malleable and does not corrode easily? [9e-43]
1. zinc
2. lead
3. silver
4. aluminium
Which element is used for window frames and other situations exposed to the weather, because it has good anti-corrosion properties? [9e-44]
1. zinc
2. copper
3. silver
4. aluminium
A solid W is reacted with acid. A colourless gas X is given off which gives a 'squeaky pop' with a lighted spill. The solid W is most likely to be a? [9e-45]
1. metal
2. metal oxide
3. metal carbonate
4. metal hydroxide
A solid W is reacted with acid. A colourless gas X is given off which gives a 'squeaky pop' with a lighted spill. The gas X is most likely to be? [9e-46]
1. oxygen
2. hydrogen
3. nitrogen
4. carbon dioxide
A solid Y is reacted with acid. A colourless gas Z is given off which gives a white milky precipitate when bubbled into limewater. The solid Y is most likely to be a? [9e-47]
1. metal
2. metal oxide
3. metal carbonate
4. metal hydroxide
A solid Y is reacted with acid. A colourless gas Z is given off which gives a white milky precipitate when bubbled into limewater. The gas Z is most likely to be? [9e-48]
1. oxygen
2. hydrogen
3. nitrogen
4. carbon dioxide
[9e-49] Complete the word equation: calcium hydroxide + hydrochloric acid ==> ?
1. calcium chloride + water
2. calcium chlorate + hydrogen
3. calcium chloride + water + carbon dioxide
4. calcium chlorate + carbon dioxide
[9e-50] Complete the word equation: zinc carbonate + hydrochloric acid ==> ?
1. zinc chloride + water
2. zinc chloride + water + carbon dioxide
3. zinc chloride + carbon dioxide
4. zinc chloride + hydrogen
[9e-51] Complete the word equation: copper carbonate + sulfuric acid ==> ?
1. copper sulfate + water
2. copper sulfate + carbon dioxide
3. copper sulfate + water + carbon dioxide
4. copper sulfate + hydrogen
[9e-52] Complete the word equation: magnesium + nitric acid ==> ?
1. magnesium nitrite + water
2. magnesium nitrate + carbon dioxide
3. magnesium nitrite + water + oxygen
4. magnesium nitrate + hydrogen
Magnesium rapidly dissolves in dilute sulfuric acid to give a clear colourless solution. Calcium only reacts slowly with dilute sulfuric acid to give a cloudy solution. Which of the statements explains these observations? [9e-53]
1. magnesium sulfate is soluble in water but calcium sulfate is only slightly soluble
2. calcium is not a reactive a metal as magnesium
3. calcium cannot form a sulfate salt but magnesium can
4. magnesium sulfate reacts with water but calcium sulfate does not
Which is used in fireworks to give a bright white effect? [9e-54]
1. sodium
2. magnesium
3. copper
4. calcium
Magnesium oxide and magnesium carbonate are similar white powders which are slightly soluble in water. Which of the following provides a simple observation to clearly distinguish them? [9e-55]
1. mix with universal indicator solution
2. heat in a bunsen flame
3. add dilute acid
4. examine under a microscope
Metal salts can be prepared from a water insoluble metal oxide, hydroxide or carbonate in dilute acid. Which of the following best explains why excess solid is mixed with the acid? [9e-56]
1. to speed up the reaction
2. its easier to filter the acid than the solid
3. to seed good crystals in the last stage
4. so that all the acid is neutralised and the excess solid can be filtered off
Copper sulfate can be prepared by reacting dilute sulfuric acid with copper oxide powder. Which piece of evidence best supports the idea that a chemical reaction has taken place? [9e-57]
1. a blue solution is formed
2. heating speeds up the dissolving
3. the copper oxide seems to disappear
4. no bubbles of gas are formed
Which two chemicals can be used to make copper nitrate? [9e-58]
1. copper carbonate and sulfuric acid
2. copper hydroxide and nitric acid
3. copper oxide and hydrochloric acid
4. copper and nitrogen dioxide
Which of the following salts is used in cooking and flavouring food? [9e-59]
1. potassium sulfate
2. lead ethanoate
3. sodium chloride
4. ammonium nitrate
Which of the following chemicals is a salt used in fertilisers to provide plants with nitrogen? [9e-60]
1. potassium hydroxide
2. lead ethanoate
3. sodium chloride
4. ammonium nitrate
Which of the following is the test for hydrogen? [9e-6]
1. gives a squeaky pop with a lit splint
2. turns limewater 'milky' (white precipitate!)
3. relights a glowing splint
4. turns blue litmus red and then leaches it
Which of the following is the test for carbon dioxide? [9e-62]
1. gives a squeaky pop with a lit splint
2. turns limewater 'milky' (white precipitate!)
3. relights a glowing splint
4. turns blue litmus red and then leaches it
Which two chemicals can be used to make magnesium nitrate? [9e-63]
1. magnesium carbonate and sulfuric acid
2. magnesium hydroxide and hydrochloric acid
3. magnesium oxide and nitric acid
4. magnesium and nitrogen dioxide
Which two chemicals can be used to make magnesium sulfate? [9e-64]
1. magnesium carbonate and nitric acid
2. magnesium hydroxide and hydrochloric acid
3. magnesium oxide and sulfur dioxide
4. magnesium hydroxide and sulfuric acid
Which two chemicals can be used to make magnesium chloride? [9e-65]
1. magnesium carbonate and hydrochloric acid
2. magnesium oxide and chlorine
3. magnesium hydroxide and sulfuric acid
4. magnesium oxide and nitric acid
Which two chemicals can be used to make magnesium sulfate? [9e-66]
1. magnesium oxide and hydrochloric acid
2. magnesium carbonate and sulfuric acid
3. magnesium hydroxide and nitric acid
4. magnesium oxide and sulfur dioxide
What could be missing from the equation below? [9e-67]

zinc + ___(1)___ ==> zinc chloride + ___(2)___
1. (1) nitric acid and (2) hydrogen
2. (1) chlorine and (2) water
3. (1) hydrochloric acid and (2) hydrogen
4. (1) sulfuric acid and (2) water
What could be missing from the equation below? [9e-68]

zinc oxide + ___(1)___ ==> zinc sulfate + ___(2)___
1. (1) nitric acid and (2) hydrogen
2. (1) chlorine and (2) water
3. (1) hydrochloric acid and (2) hydrogen
4. (1) sulfuric acid and (2) water
What could be missing from the equation below? [9e-69]

__(1)__ + hydrochloric acid ==> ___(2)___ + hydrogen
1. (1) calcium and (2) calcium chloride
2. (1) calcium and (2) calcium sulfate
3. (1) calcium oxide and (2) calcium chloride
4. (1) calcium carbonate and (2) carbon dioxide
What could be missing from the equation below? [9e-70]

__(1)__ + hydrochloric acid ==> ___(2)___ + water
1. (1) calcium and (2) calcium nitrate
2. (1) calcium oxide and (2) calcium chloride
3. (1) calcium oxide and (2) calcium sulfate
4. (1) calcium carbonate and (2) carbon dioxide
What could be missing from the equation below? [9e-71]

__(1)__ + nitric acid ==> calcium nitrate + water + ___(2)___
1. (1) calcium and (2) hydrogen
2. (1) calcium oxide and (2) carbon dioxide
3. (1) calcium carbonate and (2) carbon dioxide
4. (1) calcium carbonate and (2) hydrogen
What could be missing from the equation below? [9e-72]

__(1)__ + hydrochloric acid ==> calcium chloride + water + ___(2)___
1. (1) calcium and (2) hydrogen
2. (1) calcium oxide and (2) carbon dioxide
3. (1) calcium carbonate and (2) hydrogen
4. (1) calcium carbonate and (2) carbon dioxide
Which metal is used for roofing and corrodes to a dull green solid? [9f-1]
1. copper
2. lead
3. iron
4. silver
Which metal is used for roofing and corrodes to form a dull white solid? [9f-2]
1. copper
2. lead
3. iron
4. silver
Which metal is used for structural purposes and corrodes to a dull orange-brown solid? [9f-3]
1. copper
2. lead
3. iron
4. silver
Which metal is used for tableware and old examples of it show patches of black corrosion? [9f-4]
1. copper
2. lead
3. iron
4. silver
Which metal shows little or no corrosion even after thousands of years? [9f-5]
1. gold
2. sodium
3. iron
4. copper
Which metal shows rapid corrosion even after a few days? [9f-6]
1. gold
2. sodium
3. iron
4. copper
What must iron be in contact with before it rusts? [9f-7]
1. only water
2. only oxygen
3. water and oxygen
4. air and soil
Freshly cut soft potassium rapidly tarnishes (dull effect). Which substance is the potassium most likely to be reacting with? [9f-8]
1. nitrogen
2. carbon dioxide
3. water
4. oxygen
[9f-9] Some metals react with cold water and fizzing is observed. Other less reactive metals react when heated in steam. Complete the word equation: metal + cold water ==> ?
1. metal hydroxide + hydrogen
2. metal oxide + hydrogen
3. metal salt + oxygen
4. metal salt
[9f-10] Some metals react with cold water and fizzing is observed. Other less reactive metals react when heated in steam. Complete the word equation: hot metal + steam ==> ?
1. metal hydroxide + hydrogen
2. metal oxide + hydrogen
3. metal salt + oxygen
4. metal salt
When added to cold water, which metal slowly produces just a few bubbles when it reacts? [9f-11]
1. sodium
2. calcium
3. magnesium
4. copper
When added to cold water, which metal shows no reaction with water after a few hours and can be used for roofing? [9f-12]
1. sodium
2. calcium
3. magnesium
4. copper
When added to cold water, which metal produces lots of bubbles rapidly? [9f-13]
1. sodium
2. zinc
3. magnesium
4. copper
[9f-14] Complete the word equation: calcium + water ==> ?
1. calcium carbonate + hydrogen
2. calcium hydroxide + hydrogen
3. calcium oxide + carbon dioxide
4. calcium oxide + oxygen
[9f-15] Complete the word equation: magnesium + sulfuric acid ===> ?
1. magnesium sulfite + carbon dioxide
2. magnesium chloride + hydrogen
3. magnesium sulfate + hydrogen
4. magnesium sulfate + water
[9f-16] Complete the word equation: calcium + hydrochloric acid ===> ?
1. calcium chlorate + oxygen
2. calcium chlorate + carbon dioxide
3. calcium chloride + water
4. calcium chloride + hydrogen
Which metal reacts VERY slowly with hydrochloric acid over a few days to form a pale blue-green solution? [9f-17]
1. copper
2. magnesium
3. sodium
4. iron
Which metal rapidly reacts with hydrochloric acid to form a colourless gas and a clear colourless solution? [9f-18]
1. copper
2. magnesium
3. sodium
4. iron
Which metal is likely to react explosively with hydrochloric acid? [9f-19]
1. copper
2. magnesium
3. sodium
4. iron
Which metal reacts moderately fast with hydrochloric acid to give a colourless gas and a pale green solution? [9f-20]
1. copper
2. magnesium
3. sodium
4. iron
Strips or strands of the following metals were heated strongly in a bunsen flame. Which burns with a bright white flame? [9f-21]
1. magnesium
2. copper
3. iron
4. zinc
Strips or strands of the following metals were heated strongly in a bunsen flame. Which gives blue or green colours to the flame and becomes coated in a black solid? [9f-22]
1. magnesium
2. copper
3. iron
4. zinc
Strips or strands of the following metals were heated strongly in a bunsen flame. Which gives an orange flame, sparks and forms a dark grey solid? [9f-23]
1. magnesium
2. copper
3. iron
4. zinc
Strips or strands of the following metals were heated strongly in a bunsen flame. Which melts, glows red and forms a white solid (pale yellow hot)? [9f-24]
1. magnesium
2. copper
3. iron
4. zinc
Why is tin used to coat steel cans? [9f-25]
1. its an unreactive metal and isn't readily attacked by acidic food juices
2. it alloys with iron to make a stronger can
3. it increases the shelf life of the food
4. it stops poisonous iron dissolving in the food liquids
[9f-26] Complete the word equation: metal + oxygen ==> ?
1. metal hydroxide
2. metal oxide
3. metal oxide + hydrogen
4. metal hydroxide + hydrogen
Which is the formula of magnesium oxide? [9f-27]
1. MgSO₄
2. MgCl₂
3. MgO
4. Mg(OH)₂
Which is the formula of magnesium hydroxide? [9f-28]
1. MgSO₄
2. MgCl₂
3. MgCO₃
4. Mg(OH)₂
Which is the formula of magnesium sulfate? [9f-29]
1. MgSO₄
2. MgCl₂
3. MgCO₃
4. Mg(OH)₂
Which is the formula of magnesium chloride? [9f-30]
1. MgSO₄
2. MgCl₂
3. MgCO₃
4. Mg(NO₃)₂
Which is the formula of magnesium carbonate? [9f-31]
1. MgSO₄
2. MgCl₂
3. MgCO₃
4. Mg(NO₃)₂
Which is the formula of magnesium nitrate? [9f-32]
1. MgSO₄
2. MgCl₂
3. MgCO₃
4. Mg(NO₃)₂
Sodium hydroxide is a strong alkali, the pH of its aqueous solution is likely to be? [9f-33]
1. pH 1
2. pH 7
3. pH 10
4. pH 13
[9f-34] Which three numbers a, b and c are required to balance the equation:
a Li_(s) + b O_2(g) ==> c Li₂O_(s)
1. 4 1 2
2. 2 1 2
3. 4 2 1
4. 2 2 1
Which four numbers a, b, c and d are required to balance the equation? [9f-35]
a Na_(s) + b H₂O_(l) ==> c NaOH_(aq) + d H_2(g)
1. 2 1 2 1
2. 2 2 2 1
3. 1 2 1 2
4. 1 1 1 2
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-36]
1. they have unusually low densities
2. they have unusually high melting points
3. they are typical hard metals
4. they are poor conductors of heat
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-37]
1. they have unusually high densities
2. they have unusually low melting points
3. they are typical hard metals
4. they are poor conductors of electritcity
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-38]
1. they have unusually high densities
2. they have unusually high melting points
3. they are unusually soft metals
4. they are poor conductors of heat
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-39]
1. they have unusually high densities
2. they have unusually high melting points
3. they are typical hard metals
4. they are good conductors of heat
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-40]
1. they have unusually high densities
2. they have unusually high melting points
3. they are typical hard metals
4. they are good conductors of heat
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-41]
1. when pure they are silver solids
2. they have untypically low boiling points
3. they are untypical hard metals
4. they are poor conductors of electricity because they only have one free outer electron in the metal lattice
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-42]
1. when pure they are colourless solids
2. they have untypically low boiling points
3. they are kept under oil because of their reactivity to oxygen
4. they are poor conductors of electricity because they only have one free outer electron in the metal lattice
When an alkali metal reacts with the non-metal oxygen, which statement is TRUE about the compound formed? [9f-43]
1. it will have a low melting point
2. it will be a pale green solid
3. it will dissolve in water to give an alkaline solution of pH 14
4. it will be a covalent compound
Which is TRUE about the reaction of sodium and water containing universal indicator? [9f-44]
1. the products are sodium hydroxide and hydrogen
2. the reaction is fast and endothermic
3. the indicator turns from neutral green (pH 7) to strongly acid red (pH 1)
4. the gas formed causes a glowing splint to re-ignite
Which is TRUE about the reaction of lithium and water containing universal indicator? [9f-45]
1. the products are lithium oxide and hydrogen
2. the reaction is fast and exothermic
3. the indicator turns from acid red (pH 3) to neutral green (pH 7)
4. the metal sinks but carries on reacting
Which is TRUE about the reaction of potassium and water containing universal indicator? [9f-46]
1. the products are potassium oxide and hydrogen
2. the reaction is fast and endothermic
3. the indicator turns from neutral green (pH 7) to strongly alkaline purple (pH 14)
4. the metal sinks but carries on reacting
Which is TRUE about the reaction of lithium and water containing universal indicator? [9f-47]
1. the products are lithium oxide and hydrogen
2. the reaction is fast and endothermic
3. the indicator turns from neutral green (pH 7) to weakly alkaline dark green (pH 8)
4. the gas formed gives a pop with a lit splint
Which is TRUE about the reaction of potassium and water containing universal indicator? [9f-48]
1. the reaction is so exothermic the gas formed burns with a lilac flame
2. the products are potassium hydroxide and oxygen
3. the indicator turns from neutral green (pH 7) to weakly alkaline dark green (pH 8)
4. the gas formed re-ignites a glowing splint
Given the equation ... [9f-49]
2Li_(X) + 2H₂O_(?) ==> 2LiOH_(?) + H_2(?)
Which state symbol should be where (X) is?
1. (s)
2. (l)
3. (aq)
4. (g)
Given the equation ... [9f-50]
2Na_(?) + 2H₂O_(X) ==> 2NaOH_(?) + H_2(?)
Which state symbol should be where (X) is?
1. (s)
2. (l)
3. (aq)
4. (g)
Given the equation ... [9f-51]
2K_(?) + 2H₂O_(?) ==> 2KOH_(X) + H_2(?)
Which state symbol should be where (X) is?
1. (s)
2. (l)
3. (aq)
4. (g)
Given the equation ... [9f-52]
2Rb_(?) + 2H₂O_(?) ==> 2RbOH_(?) + H_2(X)
Which state symbol should be where (X) is?
1. (s)
2. (l)
3. (aq)
4. (g)
When sodium reacts with water, the products are? [9f-53]
1. sodium hydroxide and hydrogen
2. sodium hydroxide and oxygen
3. sodium hydride and oxygen
4. sodium oxide and hydrogen
[9f-54] Which completes the equation: potassium + water ==> ? + ?
1. potassium oxide + hydrogen
2. potassium hydroxide + hydrogen
3. potassium hydride + oxygen
4. potassium hydroxide + oxygen
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-55]
1. they are very hard
2. lumps of them are not easily shaped
3. when freshly cut they are shiny
4. they have low boiling points
Which is TRUE about lithium, sodium and potassium, known as the Alkali Metals? [9f-56]
1. they are very hard
2. they have high melting points
3. when freshly cut they are dull looking
4. lumps of them are easily shaped
Which metal is less reactive than copper? [9f-57]
1. Gold
2. Sodium
3. Iron
4. Aluminium
Which metal is more reactive than magnesium? [9f-58]
1. Gold
2. Sodium
3. Iron
4. Aluminium
Which metal is more reactive than hydrogen but less reactive than carbon? [9f-59]
1. Gold
2. Sodium
3. Iron
4. Aluminium
Which metal is less reactive than sodium but cannot be extracted heating with carbon in a furnace? [9f-60]
1. Gold
2. Potassium
3. Iron
4. Aluminium
Which is formed when a metal reacts with either water or an acid? [9f-61]
1. a metal hydroxide
2. a salt
3. hydrogen
4. an oxide
Information is given below on the reactivity of four metals Wa, Xb, Yc and Zd (NOT their real chemical symbols) ... [9f-62]
... Metal Wa does not readily react with dilute acid
... Metals Xb and Yc react slowly with acid
... Metal Zd will displace Yc from the sulfate salt solution of Yc (YcSO_4(aq))
... Metal Zd will NOT displace Xb from the chloride salt solution of Xb (XbCl_2(aq))
If their reactivity order is from the most reactive (1) (2) (3) (4) to the least reactive, which metal corresponds to (1), the most reactive of the four metals?
1. metal Xb
2. metal Zd
3. metal Yc
4. metal Wa
Information is given below on the reactivity of four metals Wa, Xb, Yc and Zd (NOT their real chemical symbols) ... [9f-63]
... Metal Wa does not readily react with dilute acid
... Metals Xb and Yc react slowly with acid
... Metal Zd will displace Yc from the sulfate salt solution of Yc (YcSO_4(aq))
... Metal Zd will NOT displace Xb from the chloride salt solution of Xb (XbCl_2(aq))
If their reactivity order is from the most reactive (1) (2) (3) (4) to the least reactive, which metal corresponds to (2), the 2nd most reactive of the four metals?
1. metal Xb
2. metal Zd
3. metal Yc
4. metal Wa
Information is given below on the reactivity of four metals Wa, Xb, Yc and Zd (NOT their real chemical symbols) ... [9f-64]
... Metal Wa does not readily react with dilute acid
... Metals Xb and Yc react slowly with acid
... Metal Zd will displace Yc from the sulfate salt solution of Yc (YcSO_4(aq))
... Metal Zd will NOT displace Xb from the chloride salt solution of Xb (XbCl_2(aq))
If their reactivity order is from the most reactive (1) (2) (3) (4) to the least reactive, which metal corresponds to (3), the 3rd most reactive of the four metals?
1. metal Xb
2. metal Zd
3. metal Yc
4. metal Wa
Information is given below on the reactivity of four metals Wa, Xb, Yc and Zd (NOT their real chemical symbols) ... [9f-65]
... Metal Wa does not readily react with dilute acid
... Metals Xb and Yc react slowly with acid
... Metal Zd will displace Yc from the sulfate salt solution of Yc (YcSO_4(aq))
... Metal Zd will NOT displace Xb from the chloride salt solution of Xb (XbCl_2(aq))
If their reactivity order is from the most reactive (1) (2) (3) (4) to the least reactive, which metal corresponds to (4), the least reactive of the four metals?
1. metal Xb
2. metal Zd
3. metal Yc
4. metal Wa
From the four elements listed, which is a metal which maybe found in the ground as the metal itself? [9f-66]
1. copper
2. hydrogen
3. iron
4. magnesium
From the four elements listed, which is a non-metal with no metallic character at all? [9f-67]
1. copper
2. hydrogen
3. iron
4. magnesium
From the four elements listed, which is a metal that displaces hydrogen from acids but not from cold water? [9f-68]
1. copper
2. gold
3. iron
4. magnesium
From the four elements listed, which is a metal that cannot be extracted by displacement with carbon? [9f-69]
1. copper
2. hydrogen
3. iron
4. magnesium
Which is less reactive than copper? [9f-70]
1. Platinum
2. Potassium
3. Zinc
4. Magnesium
Which is more reactive than magnesium? [9f-71]
1. Platinum
2. Potassium
3. Zinc
4. Magnesium
Which is more reactive than hydrogen but less reactive than carbon? [9f-72]
1. Platinum
2. Potassium
3. Zinc
4. Magnesium
Which is less reactive than sodium but cannot be extracted from its ore using carbon? [9f-73]
1. Platinum
2. Potassium
3. Zinc
4. Magnesium
Which is found in rocks as the metal itself? [9f-74]
1. Gold
2. Carbon
3. Zinc
4. Potassium
Which is a metal that displaces hydrogen from dilute acids but not from cold water? [9f-75]
1. Gold
2. Carbon
3. Zinc
4. Potassium
Which cannot be extracted from its ore with carbon? [9f-76]
1. Gold
2. aluminium
3. Zinc
4. Potassium
A steel pier in the sea rusts. The rust consists of? [9f-77]
1. iron carbonate
2. iron oxide
3. iron chloride
4. iron sulfate
Which of these reactions is possible? [9f-78]
1. Zn + CuO ==> ZnO + Cu
2. Pb + ZnCl₂ ==> PbCl₂ + Zn
3. Cu + FeSO₄ ==> CuSO₄ + Fe
4. Au + 2HCl ==> AuCl₂ + H₂
Which of these reactions is possible? [9f-79]
1. PbO + Cu ==> CuO + Pb
2. Zn + PbCl₂ ==> ZnCl₂ + Pb
3. Cu + FeSO₄ ==> CuSO₄ + Fe
4. Pt + 2HCl ==> PtCl₂ + H₂
Which of these reactions is possible? [9f-80]
1. SnO + Cu ==> CuO + Sn
2. Pb + SnCl₂ ==> PbCl₂ + Sn
3. Fe + CuSO₄ ==> FeSO₄ + Cu
4. Cu + H₂SO₄ ==> CuSO₄ + H₂
Which of these reactions is possible? [9f-81]
1. PbO + Pt ==> PtO + Pb
2. Pb + SnCl₂ ==> PbCl₂ + Sn
3. Pt + CuSO₄ ==> PtSO₄ + Cu
4. Sn + H₂SO₄ ==> SnSO₄ + H₂
Which of these reactions is possible? [9f-82]
1. lead + copper oxide ==> lead oxide + copper
2. copper + hydrochloric acid ==> copper chloride + hydrogen
3. iron + zinc sulfate ==> iron sulfate + zinc
4. lead + tin sulfate ==> lead sulfate + tin
Which of these reactions is possible? [9f-83]
1. lead + zinc oxide ==> lead oxide + zinc
2. zinc + hydrochloric acid ==> zinc chloride + hydrogen
3. tin + zinc sulfate ==> tin sulfate + zinc
4. lead + tin sulfate ==> lead sulfate + tin
Which of these reactions is possible? [9f-84]
1. lead + zinc oxide ==> zinc oxide + copper
2. platinum + sulfuric acid ==> platinum sulfate + hydrogen
3. zinc + iron sulfate ==> zinc sulfate + iron
4. gold + tin chloride ==> gold chloride + tin
Which of these reactions is possible? [9f-85]
1. silver + copper oxide ==> silver oxide + copper
2. copper + sulfuric acid ==> copper sulfate + hydrogen
3. iron + zinc chloride ==> iron chloride + zinc
4. tin + gold sulfate ==> tin sulfate + gold
Which of the following cannot be predicted about metal X, given its position in the reactivity series of metals? [9f-86]
1. whether X reacts with acid to form hydrogen
2. whether X acts as a catalyst
3. the method of extraction of X from an ore
4. the products, if any, of reacting metal X with the sulfate solution of another metal
Which will displace iron from iron oxide? [9f-87]
1. tin
2. copper
3. magnesium
4. silver
Road tankers carrying acid use steel tanks lined with glass. The glass is used because? [9f-88]
1. glass only reacts with alkalis
2. steel is not strong enough on its own
3. glass is flexible enough to withstand a crash
4. acid reacts with steel forming hydrogen
When a metal is used outside, corrosion occurs when the metal is attacked by? [9f-89]
1. oxygen
2. hydrogen
3. nitrogen
4. carbon dioxide
When scrap iron is added to blue copper sulfate solution, a pinky-brown deposit is formed and a pale green solution is left above it. The pinky-brown deposit is? [9f-90]
1. steel
2. copper metal
3. iron sulfate
4. rust
When scrap iron is added to blue copper sulfate solution, a pinky-brown deposit is formed and a pale green solution is left above it. The pale green solution is of? [9f-91]
1. sulfuric acid
2. iron oxide
3. iron sulfate
4. copper chloride
When iron becomes coated in rust, the chemical process is an example of? [9f-92]
1. electrolysis
2. electroplating
3. reduction
4. oxidation
Copper can be used for roofing domes on buildings because it? [9f-93]
1. corrodes very slowly
2. cannot react with water and oxygen
3. forms a protective green carbonate layer on the surface
4. forms a protective black oxide layer layer on the surface
In which reaction is a metal oxidised? [9f-94]
1. magnesium + water (steam) ==> magnesium oxide + hydrogen
2. carbon + oxygen ==> carbon dioxide
3. hydrogen + lead oxide ==> lead + water
4. copper oxide + carbon ==> copper + carbon dioxide
In which reaction is a solid non-metal oxidised? [9f-95]
1. magnesium + water (steam) ==> magnesium oxide + hydrogen
2. carbon + water ==> hydrogen + carbon monoxide
3. hydrogen + lead oxide ==> lead + water
4. copper oxide + hydrogen ==> copper + water
In which reaction is a gaseous non-metal oxidised? [9f-96]
1. magnesium + water ==> magnesium hydroxide + hydrogen
2. carbon + water ==> hydrogen + carbon monoxide
3. hydrogen + lead oxide ==> lead + water
4. copper oxide + carbon ==> copper + carbon dioxide
In which reaction is a metal oxide reduced? [9f-97]
1. magnesium + water ==> magnesium hydroxide + hydrogen
2. carbon + water ==> hydrogen + carbon monoxide
3. water (steam) + magnesium ==> magnesium oxide + hydrogen
4. copper oxide + carbon ==> copper + carbon dioxide
Which three numbers a, b and c are required to balance the equation? [9f-98]
a Fe_(s) + b O_2(g) ==> c Fe₃O_4(s)
1. 3 2 1
2. 3 4 1
3. 6 4 2
4. 6 2 2
Which three numbers a, b and c are required to balance the equation? [9f-99]
a Al_(s) + b O_2(g) ==> c Al₂O_3(s)
1. 1 3 2
2. 4 6 4
3. 4 3 2
4. 2 3 2
Which three numbers a, b and c are required to balance the equation? [9f-100]
a Mg_(s) + b O_2(g) ==> c MgO_(s)
1. 1 1 2
2. 4 2 2
3. 2 1 1
4. 2 1 2
Which four numbers a, b, c and d are required to balance the equation? [9f-101]
a Zn_(s) + b HCl_(aq) ==> c ZnCl_2(aq) + d H_2(g)
1. 1 2 1 1
2. 2 2 2 1
3. 2 1 1 2
4. 1 1 2 2
Which four numbers a, b, c and d are required to balance the equation? [9f-102]
a Fe_(s) + b H₂SO_4(aq) ==> c FeSO_4(aq) + d H_2(g)
1. 1 1 1 2
2. 1 1 1 1
3. 2 2 2 1
4. 2 1 2 2
Which four numbers a, b, c and d are required to balance the equation? [9f-103]
a Ca_(s) + b H₂O_(l) ==> c Ca(OH)_2(aq) + d H_2(g)
1. 2 2 2 1
2. 1 2 1 1
3. 1 2 1 2
4. 2 1 1 2
Which four numbers a, b, c and d are required to balance the equation? [9f-104]
a Fe_(s) + b H₂O_(g) ==> c Fe₃O_4(s) + d H_2(g)
1. 3 4 1 2
2. 2 3 1 4
3. 3 4 1 4
4. 2 3 2 2
Which four numbers a, b, c and d are required to balance the equation? [9f-105]
a Mg_(s) + b CuSO_4(aq) ==> c MgSO_4(aq) + d Cu_(s)
1. 1 1 1 1
2. 2 1 2 2
3. 1 2 1 2
4. 2 2 2 1
Which element is a metal that is most likely to be found in rocks as the metal itself? [9f-106]
1. copper
2. carbon
3. iron
4. sodium
Which element is a metal that displaces hydrogen from dilute acids but not from cold water? [9f-107]
1. copper
2. carbon
3. iron
4. sodium
Which element is a metal that cannot be extracted using carbon? [9f-108]
1. copper
2. tin
3. iron
4. sodium
Which metal is more reactive than hydrogen but less reactive than carbon? [9f-109]
1. tin
2. aluminium
3. copper
4. silver
Which metal is less reactive than sodium but must be extracted using electrolysis of the molten ore? [9f-110]
1. tin
2. aluminium
3. lead
4. silver
Which metal should react with dilute hydrochloric acid, but very slowly? [9f-111]
1. calcium
2. iron
3. lead
4. silver
Which metal is most likely to be found in rocks as the metal itself and not combined with other elements like oxygen? [9f-112]
1. tin
2. aluminium
3. lead
4. silver
Hydrocarbon fuels burn to form carbon dioxide and water. Which is a correct description of a chemical test for carbon dioxide? [9h-1]
1. white milky precipitate with limewater
2. turns white copper sulfate powder blue
3. turns blue cobalt chloride paper pink
4. boils at 100^oC
Hydrocarbon fuels burn to form carbon dioxide and water. Which is a correct description of a chemical test for water? [9h-2]
1. white milky precipitate with limewater
2. turns white copper sulfate powder blue
3. turns universal indicator green
4. boils at 100^oC
Hydrocarbon fuels burn to form carbon dioxide and water. Which is a correct description of a chemical test for water? [9h-3]
1. white milky precipitate with limewater
2. turns universal indicator green
3. turns blue cobalt chloride paper pink
4. boils at 100^oC
Hydrocarbon fuels burn to form carbon dioxide and water. Which is a correct description of a physical test for water? [9h-4]
1. white milky precipitate with limewater
2. turns white copper sulfate powder blue
3. turns blue cobalt chloride paper pink
4. boils at 100^oC
A simple battery (cell) can be made by dipping two different strips of metal into a conducting salt solution of ions. Which two metals will produce the largest voltage? [9h-5]
1. magnesium and silver
2. zinc and iron
3. magnesium and zinc
4. zinc and tin
A simple battery (cell) can be made by dipping two different strips of metal into a conducting salt solution of ions. Which two metals will produce the smallest voltage? [9h-6]
1. magnesium and silver
2. zinc and iron
3. magnesium and zinc
4. zinc and tin
A simple battery (cell) can be made by dipping two different strips of metal into a conducting salt solution of ions. Which two metals will produce the biggest voltage? [9h-7]
1. zinc and copper
2. zinc and tin
3. magnesium and copper
4. tin and lead
A simple battery (cell) can be made by dipping two different strips of metal into a conducting salt solution of ions. Which two metals will produce the smallest voltage? [9h-8]
1. zinc and copper
2. zinc and tin
3. magnesium and copper
4. tin and lead
A suitable material for a match head can be made from a mixture of carbon, sulfur and potassium chlorate. Which best explains how the match ignites on striking it? [9h-9]
1. friction generates heat to trigger the reaction
2. friction allows air to get to the carbon and sulfur
3. friction breaks down the potassium chlorate into smaller reactive particles
4. friction makes the carbon and sulfur combine exothermically
A suitable material for a match head can be made from a mixture of carbon, sulfur and potassium chlorate. Which best explains the role of the carbon? [9h-10]
1. acts as a catalyst to help burn the sulfur
2. burns with oxygen from the potassium chlorate
3. produces oxygen to burn the sulfur
4. absorbs poisonous gases formed in the combustion reaction
A suitable material for a match head can be made from a mixture of carbon, sulfur and potassium chlorate. Which best explains the role of the potassium chlorate? [9h-11]
1. acts a catalyst to trigger the reaction
2. burns exothermically with oxygen from the air
3. produces oxygen to burn the sulfur
4. absorbs poisonous gases formed in the combustion reaction
A suitable material for a match head can be made from a mixture of carbon, sulfur and potassium chlorate. Which best explains the role of the sulfur? [9h-12]
1. absorbs poisonous combustion gases
2. helps to burn the carbon
3. produces oxygen to burn the carbon
4. burns with oxygen from the potassium chlorate
Carbon dioxide is formed in the complete combustion of a fuel. Carbon monoxide can be formed in the incomplete combustion of a fuel. Which statement is TRUE about these two gases? [9h-13]
1. carbon monoxide will burn and carbon dioxide will not
2. both gases give a milky precipitate when bubbled into limewater
3. both gases are toxic to animals
4. carbon monoxide is an element and carbon dioxide is a compound
Carbon dioxide is formed in the complete combustion of a fuel. Carbon monoxide can be formed in the incomplete combustion of a fuel. Which statement is TRUE about these two gases? [9h-14]
1. neither compound will burn in air
2. only carbon dioxide gives a milky precipitate when bubbled into limewater
3. both gases are toxic to animals
4. carbon monoxide is an element and carbon dioxide is a compound
Carbon dioxide is formed in the complete combustion of a fuel. Carbon monoxide can be formed in the incomplete combustion of a fuel. Which statement is TRUE about these two gases? [9h-15]
1. neither compound will burn in air
2. both gases give a milky precipitate when bubbled into limewater
3. only carbon monoxide gas is toxic to animals
4. carbon monoxide is an element and carbon dioxide is a compound
Carbon dioxide is formed in the complete combustion of a fuel. Carbon monoxide can be formed in the incomplete combustion of a fuel. Which statement is TRUE about these two gases? [9h-16]
1. neither compound will burn in air
2. both gases give a milky precipitate when bubbled into limewater
3. both gases are toxic to animals
4. both gases are compounds
Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel? [9h-17]
1. on burning it produces no pollution effects
2. on burning it gives off a lot of wasted light energy
3. it is not as flammable or explosive as oil
4. it is easily delivered to homes in liquid form
Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel? [9h-18]
1. on burning it produces lots of greenhouse gases
2. on burning it gives off little wasted light energy
3. it is not as flammable or explosive as oil
4. it is easily delivered in liquid form
Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel? [9h-19]
1. on burning it produces lots of greenhouse gases
2. on burning it gives off lots of wasted light energy
3. it is explosive when mixed with air
4. it is easily delivered in liquid form
Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel? [9h-20]
1. on burning it produces lots of greenhouse gases
2. on burning it gives off lots of wasted light energy
3. it is not as flammable or explosive as oil
4. it has to be compressed before it can be distributed efficiently
Which word would you associate with the phrase 'a substance that releases energy on burning'? [9h-21]
1. fuel
2. exothermic
3. reactive
4. endothermic
Which word would you associate with the phrase 'reaction that gives out heat'? [9h-22]
1. fuel
2. exothermic
3. reactive
4. endothermic
Which word would you associate with the phrase 'easily changes chemically'? [9h-23]
1. fuel
2. exothermic
3. reactive
4. endothermic
Which word would you associate with the phrase 'reaction that absorbs heat'? [9h-24]
1. fuel
2. exothermic
3. reactive
4. endothermic
Which is formed in the complete combustion of a hydrocarbon fuel? [9h-25]
1. H₂O
2. C₈H₁₈
3. CO
4. O₂
Which substance is found in petrol? [9h-26]
1. C
2. C₈H₁₈
3. CO
4. H₂
Which substance is most likely to form in the incomplete (inefficient) burning of a fuel? [9h-27]
1. H₂O
2. C₈H₁₈
3. CO
4. CO₂
Which substance is needed to burn any fuel? [9h-28]
1. H₂O
2. C₈H₁₈
3. CO
4. O₂
Which substance could be a fuel of the future? [9h-29]
1. H₂
2. C₈H₁₈
3. CO
4. C
Which substance is a product of the complete combustion of a fuel? [9h-30]
1. C
2. CO₂
3. CO
4. O₂
Which substance is a colourless flammable liquid? [9h-31]
1. H₂O
2. C
3. C₈H₁₈
4. CO₂
Which substance is a hydrocarbon? [9h-32]
1. H₂
2. CO
3. C
4. C₈H₁₈
Which is likely to be the most exothermic reaction? (produces the biggest temperature rise) [9h-33]
1. magnesium + copper sulfate ==> magnesium sulfate + copper
2. tin + lead nitrate ==> tin nitrate + lead
3. copper + aluminium sulfate ==> copper sulfate + aluminium
4. aluminium + iron nitrate ==> aluminium nitrate + iron
Which of the following reactions is likely to be the least exothermic? (produces the smallest temperature rise) [9h-34]
1. magnesium + copper sulfate ==> magnesium sulfate + copper
2. tin + lead nitrate ==> tin nitrate + lead
3. aluminium + copper sulfate ==> aluminium sulfate + copper
4. aluminium + iron nitrate ==> aluminium nitrate + iron
Which of the following reactions is likely to be the most exothermic? (produces the largest temperature rise) [9h-35]
1. copper + magnesium sulfate ==> copper sulfate + magnesium
2. zinc + tin nitrate ==> zinc nitrate + lead
3. calcium + silver nitrate ==> calcium nitrate + silver
4. iron + tin sulfate ==> iron sulfate + tin
Which of the following reactions is likely to be the least exothermic? (produces the smallest temperature rise) [9h-36]
1. magnesium + zinc sulfate ==> magnesium sulfate + zinc
2. zinc + lead nitrate ==> zinc nitrate + lead
3. calcium + silver nitrate ==> calcium nitrate + silver
4. iron + tin sulfate ==> iron sulfate + tin
Which chemical change corresponds to a 'neutralisation reaction'? [9h-37]
1. sodium hydroxide + hydrochloric acid ==> sodium chloride + water
2. methane + oxygen ==> carbon dioxide + water
3. zinc + copper sulfate ==> zinc sulfate + copper
4. calcium carbonate ==> calcium oxide + carbon dioxide
Which of these chemical changes corresponds to a 'fuel combustion' reaction? [9h-38]
1. sodium hydroxide + hydrochloric acid ==> sodium chloride + water
2. methane + oxygen ==> carbon dioxide + water
3. zinc + copper sulfate ==> zinc sulfate + copper
4. calcium carbonate ==> calcium oxide + carbon dioxide
Which of these chemical changes corresponds to a 'displacement reaction'? [9h-39]
1. sodium hydroxide + hydrochloric acid ==> sodium chloride + water
2. methane + oxygen ==> carbon dioxide + water
3. zinc + copper sulfate ==> zinc sulfate + copper
4. calcium carbonate ==> calcium oxide + carbon dioxide
Which of these chemical changes corresponds to a 'decomposition reaction'? [9h-40]
1. sodium hydroxide + hydrochloric acid ==> sodium chloride + water
2. methane + oxygen ==> carbon dioxide + water
3. zinc + copper sulfate ==> zinc sulfate + copper
4. calcium carbonate ==> calcium oxide + carbon dioxide
Experiments were done to decide which chemicals would be best to use for an emergency food cooking heater. The chemicals on mixing need to react exothermically to release heat. Chemicals can be tested in a simple calorimeter to measure the temperature rise. From the results for mixtures A to D, which would be the most efficient to use in such a device? [9h-41]
1. 10g mix, temperature rose from 23^o to 43^oC
2. 20g mix, temperature rose from 25^o to 35^oC
3. 30g mix, temperature rose from 30^o to 75^oC
4. 40g mix, temperature rose from 28^o to 68^oC
Experiments were done to decide which chemicals would be best to use for an emergency food cooking heater. The chemicals on mixing need to react exothermically to release heat. Chemicals can be tested in a simple calorimeter to measure the temperature rise. From the results for mixtures A to D, which would be the least efficient to use in such a device? [9h-42]
1. 10g mix, temperature rose from 23^o to 43^oC
2. 20g mix, temperature rose from 25^o to 35^oC
3. 30g mix, temperature rose from 30^o to 75^oC
4. 40g mix, temperature rose from 28^o to 68^oC
Experiments were done to decide which chemicals would be best to use for an emergency food cooking heater. The chemicals on mixing need to react exothermically to release heat. Chemicals can be tested in a simple calorimeter to measure the temperature rise. From the results for mixtures A to D, which would be the 2nd most efficient to use in such a device? [9h-43]
1. 10g mix, temperature rose from 23^o to 43^oC
2. 20g mix, temperature rose from 25^o to 35^oC
3. 30g mix, temperature rose from 30^o to 75^oC
4. 40g mix, temperature rose from 28^o to 68^oC
Experiments were done to decide which chemicals would be best to use for an emergency food cooking heater. The chemicals on mixing need to react exothermically to release heat. Chemicals can be tested in a simple calorimeter to measure the temperature rise. From the results for mixtures A to D, which would be the 3rd most efficient to use in such a device? [9h-44]
1. 10g mix, temperature rose from 23^o to 43^oC
2. 20g mix, temperature rose from 25^o to 35^oC
3. 30g mix, temperature rose from 30^o to 75^oC
4. 40g mix, temperature rose from 28^o to 68^oC
In a measured (quantitative) experiment, burning 2.4g of magnesium produced 4.0g of white magnesium oxide powder (MgO). What mass of oxygen combined with the magnesium? [9h-45]
1. 1.6g
2. 2.4g
3. 3.2g
4. 6.4g
In a measured (quantitative) experiment, burning 2.4g of magnesium produced 4.0g of white magnesium oxide powder (MgO). What mass of magnesium oxide might you expect if 3.6g of magnesium was burned? [9h-46]
1. 2.4g
2. 6.0g
3. 7.2g
4. 6.4g
Calcium carbonate decomposes on strong heating to form solid calcium oxide and carbon dioxide gas.
CaCO₃ ==> CaO + CO₂
If 100g of calcium carbonate is decomposed to give a residue of 56g of calcium oxide, what is the mass of the carbon dioxide formed? [9h-47]
1. 0g
2. 56g
3. 44g
4. 54g
If 30g of salt is dissolved in 100g of water, what mass of salt solution is formed? [9h-48]
1. 70g
2. 100g
3. 30g
4. 130g
Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel? [9h-49]
1. on burning it produces only water
2. on burning it gives off a lot of wasted light energy
3. it is not as flammable or explosive as oil
4. it is easily delivered to homes in liquid form
Hydrogen could well be a fuel for the future but there are advantages and disadvantages to its use. Which statement is TRUE about the potential use of hydrogen as a fuel? [9h-50]
1. on burning it gives off a lot of wasted light energy
2. it is a dangerously explosive gas
3. it is not as flammable or explosive as oil
4. it is easily delivered to homes in liquid form
When a metal is heated or burned in air, the product weighs more than the metal. What is the reason for this observation? [9h-51]
1. the metal absorbs oxygen from the air
2. the metal absorbs water vapour from the air
3. the metal combines with oxygen in the air
4. the metal combines with nitrogen in the air
Propane gas (C₃H₈) can be used in gas cookers and burns in just the same way methane completely burns in a bunsen flame. Which is the correct right hand side of the equation to balance the left hand side given below? [9h-52]
C₃H₈ + 5O₂ ==> ? + ?
1. 3CO + 4H₂O
2. 3CO₂ + 2H₂O
3. 4CO₂ + 8HO
4. 3CO₂ + 4H₂O
Which part of the chemical industry manufactures drugs and medicines? [9h-53]
1. pharmaceutical
2. dyestuffs
3. plastics
4. petrochemical
Which part of the chemical industry manufactures colours for clothes? [9h-54]
1. pharmaceutical
2. dyestuffs
3. plastics
4. petrochemical
Which part of the chemical industry manufactures PVC for windows? [9h-55]
1. pharmaceutical
2. dyestuffs
3. plastics
4. petrochemical
Which part of the chemical industry manufactures hydrocarbon fuels? [9h-56]
1. pharmaceutical
2. dyestuffs
3. plastics
4. petrochemical

KS3 science practice exam questions for AQA KS3 chemistry, Edexcel KS3 chemistry and OCR KS3 chemistry KS3 science courses

STATEMENT about ....	ELEMENT	COMPOUND	MIXTURE
has a fixed melting point?	true or false?	true or false?	true or false?

KS3 Chemistry QUIZ on CHEMICAL and MATERIAL BEHAVIOUR