OCR GCSE 9-1 21st Century Science Chemistry B QUIZ on Topic C6 "Making useful chemicals" (Higher Tier)

The reaction illustrated produces ...? [ab-1]
1. a salt + water
2. a salt only
3. a salt and hydrogen
4. water only
The type of reaction illustrated is called ...? [ab-2]
1. decomposition
2. neutralisation
3. displacement
4. oxidation
To produce sodium sulfate by the reaction illustrated you need ...? [ab-3]
1. potassium sulfate + sodium hydroxide
2. sodium chloride + sulfuric acid
3. sodium hydroxide + sulfuric acid
4. sodium hydroxide + hydrochloric acid
In the reaction illustrated, in order to add the correct amount of acid you would add a few drops of Universal Indicator and add acid until the indicator in the conical flask was ...? [ab-4]
1. blue
2. orange
3. yellow
4. green
In the reaction illustrated, in order to add the correct amount of acid you would add a few drops of Universal Indicator to the conical flask. If too little acid was added the indicator colour could be? [ab-5]
1. blue
2. orange
3. yellow
4. green
In the reaction illustrated, in order to add the correct amount of acid you would add a few drops of Universal Indicator to the conical flask. If too much acid was added the indicator colour could be? [ab-6]
1. blue
2. orange
3. purple
4. green
To produce potassium chloride by the reaction illustrated you need ...? [ab-7]
1. potassium sulfate + hydrochloric acid
2. sodium chloride + potassium hydroxide
3. potassium hydroxide + hydrochloric acid
4. sodium hydroxide + hydrochloric acid
To produce lithium nitrate by the reaction illustrated you need ...? [ab-8]
1. lithium sulfate + nitric acid
2. sodium nitrate + lithium hydroxide
3. potassium nitrate + lithium hydroxide
4. lithium hydroxide + nitric acid
The diagram shows a method of preparing salts.
Which of the following will forms when a transition metal oxide reacts with hydrochloric acid? [ab-9]
1. transition metal chloride + water
2. transition metal chloride + hydrogen
3. transition metal chloride only
4. water only
The diagram shows a method of preparing salts from reacting an insoluble metal oxide and an acid.
This type of reaction is called? [ab-10]
1. electrolysis
2. neutralisation
3. reduction
4. displacement
The diagram shows a method of preparing salts by reacting an insoluble metal oxide with an acid.
How can you tell when all the acid has been used up before filtering the mixture? [ab-11]
1. universal indicator will give a yellow colour in the acid
2. universal indicator will give a pale blue colour in the acid
3. no more of the metal oxide will dissolve in the acid
4. the solution will go clear
The diagram shows a method of preparing salts.
Which of the following will form a transition metal sulfate and hydrogen? [ab-12]
1. transition metal oxide + sulfuric acid
2. transition metal + sodium sulfate
3. transition metal hydroxide + potassium sulfate
4. transition metal + sulfuric acid
Which is the strongest base or alkali? [ab-13]
1. limewater
2. baking soda
3. vinegar
4. wine
Which is the weakest base or alkali? [ab-14]
1. limewater
2. baking soda
3. vinegar
4. wine
Which is the strongest acid? [ab-15]
1. limewater
2. baking soda
3. vinegar
4. wine
Which is the weakest acid? [ab-16]
1. limewater
2. baking soda
3. vinegar
4. wine
Which of the following can be mixed to form a neutral solution? [ab-17]
1. limewater and fizzy drink
2. baking soda and toothpaste
3. vinegar and wine
4. calomine lotion and common salt
Which of the following can be mixed to form a neutral solution? [ab-18]
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? [ab-19]
1. limewater
2. wine
3. calomine lotion
4. common salt
Which of the following can be safely used to treat an alkaline wasp sting? [ab-20]
1. calomine lotion
2. vinegar
3. washing soda
4. common salt
Which of the following is most likely to be part of an ant-acid indigestion medicine? [ab-21]
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? [ab-22]
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. Non 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 ...? [ab-23]
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. 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 ...? [ab-24]
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. Non 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 ...? [ab-25]
1. a soluble neutral substance
2. a slightly soluble acid
3. a slightly soluble neutral substance
4. a slightly soluble alkali
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. A few drops of universal indicator were added and the solution turned green. This meant the white powder was ...? [ab-26]
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. Non 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 ...? [ab-26]
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. A few drops of universal indicator were added and the solution turned red. This meant the white powder was ...? [ab-26]
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? [ab-49]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of the following is the pH of a strong alkali? [ab-50]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of the following is the pH of a weak acid? [ab-51]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
Which of the following is the pH of a weak alkali? [ab-52]
1. pH 1
2. pH 14
3. pH 5
4. pH 9
When dilute nitric acid reacts with sodium hydroxide the products are? [ab-53]
1. sodium nitrate + water
2. sodium nitrate + hydrogen
3. sodium hydride + hydrogen nitrate
4. sodium nitrite + oxygen
dilute acid X + copper(II) carbonate ==> copper(II) sulfate + water + carbon dioxide. Acid X is? [ab-54]
1. nitric acid
2. sulfuric acid
3. sulfurous acid
4. hydrochloric acid
dilute acid X + magnesium hydroxide ==> magnesium chloride + water. Acid X is? [ab-55]
1. ammonium chlorate
2. sulfuric acid
3. hydrochloric acid
4. chloric acid
magnesium + dilute acid X ==> magnesium nitrate + hydrogen. Acid X is? [ab-56]
1. ammonium nitrate
2. nitrogen dioxide
3. nitrous acid
4. nitric acid
When hydrochloric acid is added to copper carbonate, the gas bubbles formed can be identified by? [ab-57]
1. burning with a squeaky pop
2. turning limewater cloudy
3. relighting a glowing splint
4. turning blue litmus red and then bleaching it
When sulfuric acid is added to zinc, the gas bubbles formed can be identified by? [ab-58]
1. burning with a squeaky pop
2. turning limewater cloudy
3. relighting a glowing splint
4. turning blue litmus red and then bleaching it
An iron tray was cleaned with dilute hydrochloric acid and bubbles formed. The gas formed was? [ab-59]
1. oxygen
2. chlorine
3. hydrogen
4. carbon dioxide
A carbonate mineral rock was tested with dilute sulfuric acid and bubbles formed. The gas formed was? [ab-60]
1. carbon monoxide
2. sulfur dioxide
3. hydrogen
4. carbon dioxide
Dilute sulfuric acid will only form one product when reacted with? [ab-61]
1. ammonia
2. copper
3. magnesium oxide
4. zinc carbonate
Dilute sulfuric acid will not readily react with? [ab-62]
1. ammonia
2. copper
3. magnesium oxide
4. zinc carbonate
Which will form a salt and water when reacted with dilute hydrochloric acid? [ab-63]
1. ammonia
2. copper
3. magnesium oxide
4. zinc carbonate
Which will form a salt, water and carbon dioxide when reacted with dilute hydrochloric acid? [ab-64]
1. ammonia
2. copper
3. magnesium oxide
4. zinc carbonate
Which of these reactants is the best combination to use to make magnesium sulfate? [ab-65]
1. magnesium oxide + sulfuric acid
2. magnesium chloride + sodium sulfate
3. sulfuric acid + magnesium chloride
4. magnesium nitrate + sulfuric acid
Which of these reactants is the best combination to use to make zinc nitrate? [ab-66]
1. zinc chloride + nitric acid
2. nitric acid + zinc hydroxide
3. nitric acid + zinc sulfate
4. zinc oxide + nitrous acid
Which of these reactants is the best combination to use to make copper(II) sulfate? [ab-67]
1. copper + sulfuric acid
2. copper(II) chloride + sodium sulfate
3. copper(II) oxide + sulfuric acid
4. copper(II) nitrate + sodium chloride
Which of these reactants is the best combination to use to make zinc chloride? [ab-68]
1. calcium chloride + zinc carbonate
2. zinc nitrate + hydrochloric acid
3. sodium chloride + zinc oxide
4. zinc carbonate + hydrochloric acid
The diagram shows the preparation of a salt. Which word applies to stages 1-2? [ab-69]
1. neutralisation
2. filtration
3. evaporation
4. condensation
The diagram shows the preparation of a salt. Which word applies to stage 3? [ab-70]
1. neutralisation
2. filtration
3. evaporation
4. condensation
The diagram shows the preparation of a salt. Which word describes the change from 3 to 4? [ab-71]
1. neutralisation
2. filtration
3. evaporation
4. condensation
The diagram shows the preparation of a salt. Which word describes stage 4? [ab-72]
1. neutralisation
2. filtration
3. evaporation
4. crystallisation
The diagram shows the preparation of a salt using a solid and an acid. Which is true concerning this method? [ab-73]
1. the solid can be an insoluble base
2. it is not a neutralisation reaction
3. you cannot use an insoluble carbonate
4. the solid must be an alkali
The diagram shows the preparation of a salt. Which word means a 'soluble base'? [ab-74]
1. oxide
2. alkali
3. hydroxide
4. indicator
The diagram shows a method of salt preparation. Which statement is true about the method? [ab-75]
1. the method uses an insoluble base
2. the acid must be in the burette and the alkali in the flask
3. the neutralisation point is detected with an indicator
4. the salt will precipitate at the neutralisation point
The diagram shows one method of salt preparation. Which statement is true about the method illustrated? [ab-76]
1. the salt will precipitate at the neutralisation point
2. an alkali is used
3. the neutralisation point is detected with an indicator
4. the method uses an insoluble base
Complete the word equation:
zinc oxide + hydrochloric acid ==> ..???.. [ab-77]
1. zinc chloride + hydrogen
2. zinc hydrochloride + water
3. zinc chloride + water
4. zinc hydrochloride chloride + water + carbon dioxide
Complete the word equation:
zinc hydroxide + hydrochloric acid ==> ..???.. [ab-78]
1. zinc hydrochloride + water
2. zinc chloride + water + carbon dioxide
3. zinc hydrochloride + hydrogen
4. zinc chloride + water
Complete the word equation:
zinc + hydrochloric acid ==> ..???.. [ab-79]
1. zinc chloride + hydrogen
2. zinc chloride + water
3. zinc hydrochloride + hydrogen
4. zinc hydrochloride + water
Complete the word equation:
zinc carbonate + hydrochloric acid ==> ..???.. [ab-80]
1. zinc hydrochloride + water
2. zinc chloride + water + carbon dioxide
3. zinc hydrochloride + hydrogen
4. zinc chloride + carbon dioxide
Complete the word equation:
nickel + sulfuric acid ==> ..???.. [ab-81]
1. nickel sulfate + hydrogen
2. nickel sulfate + water
3. nickel sulfite + water
4. nickel sulfite + hydrogen
Complete the word equation:
nickel oxide + sulfuric acid ==> ..???.. [ab-82]
1. nickel sulfate + hydrogen
2. nickel sulfate + water
3. nickel sulfite + water
4. nickel sulfite + hydrogen
Complete the word equation:
nickel hydroxide + sulfuric acid ==> ..???.. [ab-83]
1. nickel sulfate + hydrogen
2. nickel sulfite + water
3. nickel sulfate + water
4. nickel sulfite + hydrogen
Complete the word equation:
nickel carbonate + sulfuric acid ==> ..???.. [ab-84]
1. nickel sulfate + carbon dioxide
2. nickel sulfite + water
3. nickel sulfate + water
4. nickel sulfate + water + carbon dioxide
Complete the word equation:
ammonia + sulfuric acid ==> ..???.. [ab-85]
1. ammonium sulfate
2. ammonia sulfate
3. ammonium hydrogensulfate
4. ammonia sulfite
Complete the word equation:
ammonia + hydrochloric acid ==> ..???.. [ab-86]
1. ammonia chloride
2. ammonium chloride
3. ammonium hydrochloride
4. ammonia hydrochloride
Complete the word equation:
ammonia + nitric acid ==> ..???.. [ab-87]
1. ammonia nitrite
2. ammonium nitrite
3. ammonium nitrate
4. ammonia hydrogennitrate
Complete the word equation:
sodium hydroxide + sulfuric acid ===> ..???.. [ab-88]
1. sodium sulfate
2. sodium sulfate + hydrogen
3. sodium hydrogensulfite + water
4. sodium sulfate + water
Given the following neutralisation equation:
NaOH_(aq) + HCl_(aq) ==> NaCl_(aq) + H₂O_(l)
Which is the alkali? [ab-89]
1. NaOH
2. HCl
3. NaCl
4. H₂O
Given the following neutralisation equation:
NaOH_(aq) + HCl_(aq) ==> NaCl_(aq) + H₂O_(l)
Which is the acid? [ab-90]
1. NaOH
2. HCl
3. NaCl
4. H₂O
Given the following neutralisation equation:
NaOH_(aq) + HCl_(aq) ==> NaCl_(aq) + H₂O_(l)
Which is the salt? [ab-91]
1. NaOH
2. HCl
3. NaCl
4. H₂O
Given the following neutralisation equation:
NaOH_(aq) + HCl_(aq) ==> NaCl_(aq) + H₂O_(l)
Which is the base? [ab-92]
1. H₂O
2. HCl
3. NaCl
4. NaOH
Which two reactants would you use to make potassium nitrate? [ab-101]
1. nitric acid and potassium hydroxide
2. sodium nitrate and potassium chloride
3. sulfuric acid and sodium nitrate
4. nitric acid and sodium hydroxide
Insoluble metal oxides and metal hydroxides (bases) will not dissolve to form an alkaline solution. But they will dissolve in acids to give the same reaction as with alkalis. This method is particularly handy for making transition metal salts. Which reaction will produce a transition metal chloride and hydrogen? [ab-102]
1. transition metal oxide + sodium chloride
2. transition metal + hydrochloric acid
3. transition metal hydroxide + hydrochloric acid
4. transition metal + sulfuric acid
Insoluble metal oxides and metal hydroxides (bases) will not dissolve to form an alkaline solution. But they will dissolve in acids to give the same reaction as with alkalis. This method is particularly handy for making transition metal salts. When sufficient base has been added so that no more dissolves, how is the excess base removed? [ab-103]
1. boiling
2. distillation
3. filtration
4. crystallisation
Insoluble metal oxides and metal hydroxides (bases) will not dissolve to form an alkaline solution. But they will dissolve in acids to give the same reaction as with alkalis. This method is particularly handy for making transition metal salts. When sufficient base has been added so that no more dissolves. How could you test that all the acid was neutralised? [ab-104]
1. see if crystals form on evaporating the solution
2. see if the solution is clear
3. measure the boiling point of the solution
4. use indicator paper
Insoluble bases and metals will not dissolve to form an alkaline solution, but they will dissolve in acids to form salts. This method is particularly handy for making transition metal salts. What pair of chemicals will make cobalt sulfate and water? [ab-105]
1. cobalt oxide + sulfuric acid
2. cobalt + hydrochloric acid
3. cobalt + nitric acid
4. cobalt hydroxide + nitric acid
Insoluble bases and metals will not dissolve to form an alkaline solution, but they will dissolve in acids to form salts. This method is particularly handy for making transition metal salts. What pair of chemicals will make cobalt chloride and hydrogen? [ab-106]
1. cobalt oxide + sulfuric acid
2. cobalt + hydrochloric acid
3. cobalt hydroxide + sodium chloride
4. cobalt hydroxide + nitric acid
Which two reactants make ammonium chloride and water? [ab-107]
1. ammonium sulfate and hydrochloric acid
2. ammonium hydroxide and sodium chloride
3. ammonium hydroxide and hydrochloric acid
4. ammonia and potassium chloride
Which of these gives an alkaline solution when dissolved in water? [ab-108]
1. aluminium hydroxide
2. copper hydroxide
3. iron hydroxide
4. ammonia (ammonium hydroxide)
Which of these gives an alkaline solution when dissolved in water? [ab-109]
1. sodium hydroxide
2. copper hydroxide
3. iron hydroxide
4. aluminium hydroxide
Which of these gives an alkaline solution when dissolved in water? [ab-109]
1. nickel hydroxide
2. potassium hydroxide
3. iron hydroxide
4. magnesium hydroxide
Which of A to D completes the equation ..?.. [ab-111]
..?.. + potassium hydroxide ==> potassium sulfate + water
1. potassium nitrate
2. calcium hydroxide
3. sulfuric acid
4. sodium chloride
Which of A to D completes the equation ..?.. [ab-112]
hydrochloric acid + sodium hydroxide ==> ..?.. + water
1. sodium sulfate
2. potassium chloride
3. calcium chloride
4. sodium chloride
Which of A to D completes the equation ..?.. [ab-113]
..?.. + nitric acid ==> ammonium nitrate
1. ammonia (ammonium hydroxide)
2. calcium hydroxide
3. ammonium sulfate
4. sodium nitrate
Which of A to D completes the equation ..?.. [ab-114]
sulfuric acid + ..?.. ==> calcium sulfate + water
1. ammonia sulfate
2. calcium hydroxide
3. calcium chloride
4. sodium sulfate
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Zn_(s) + b HCl_(aq) ==> c ZnCl_2(aq) + d H_2(g) ? [ab-29]
1. 1 2 1 1
2. 2 2 2 1
3. 2 1 1 2
4. 1 1 2 2
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Fe_(s) + b H₂SO_4(aq) ==> c FeSO_4(aq) + d H_2(g) ? [ab-30]
1. 1 1 1 2
2. 1 1 1 1
3. 2 2 2 1
4. 2 1 2 2
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Al_(s) + b HCl_(aq) ==> c AlCl_3(aq) + d H_2(g) ? [ab-31]
1. 1 6 3 2
2. 2 3 2 3
3. 2 6 2 3
4. 1 3 3 2
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Al_(s) + b H₂SO_4(aq) ==> c Al₂(SO₄)_3(aq) + d H_2(g) ? [ab-32]
1. 1 3 1 3
2. 2 3 2 3
3. 1 2 2 2
4. 2 3 1 3
Which quantities a, b, c, d and e are required to balance the equation ... (note that '1's would not be shown in the equation)
a CaCO_3(s) + b HCl_(aq) ==> c CaCl_2(aq) + d H₂O_(l) + e CO_2(g) ? [ab-33]
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 quantities a, b, c, d and e are required to balance the equation ... (note that '1's would not be shown in the equation)
a Na₂CO_3(s) + b HCl_(aq) ==> c NaCl_(aq) + d H₂O_(l) + e CO_2(g) ? [ab-34]
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 quantities a, b, c, d and e are required to balance the equation ... (note that '1's would not be shown in the equation)
a Tl₂(CO₃)_3(s) + b HCl_(aq) ==> c TlCl_3(aq) + d H₂O_(l) + e CO_2(g) ? [ab-35]
1. 2 6 4 3 6
2. 1 3 2 6 2
3. 1 6 2 3 3
4. 2 3 4 3 6
Which quantities a, b, c, d and e are required to balance the equation ... (note that '1's would not be shown in the equation)
a Tl₂(CO₃)_3(s) + b H₂SO_4(aq) ==> c Tl₂(SO₄)_3(aq) + d H₂O_(l) + e CO_2(g) ? [ab-36]
1. 2 6 4 3 6
2. 1 3 2 6 6
3. 1 6 2 6 3
4. 1 3 1 3 3
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a NaOH_(aq) + b HCl_(aq) ==> c NaCl_(aq) + d H₂O_(l) ? [ab-37]
1. 1 1 1 1
2. 1 2 2 1
3. 2 1 1 2
4. 1 2 1 1
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Ca(OH)_2(aq) + b HCl_(aq) ==> c CaCl_2(aq) + d H₂O_(l) ? [ab-38]
1. 1 2 1 1
2. 1 2 1 2
3. 2 1 1 2
4. 2 2 2 1
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Al(OH)_3(s) + b HCl_(aq) ==> c AlCl_3(aq) + d H₂O_(l) ? [ab-39]
1. 2 6 2 3
2. 1 6 2 6
3. 1 3 1 3
4. 2 3 2 3
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Fe₂O_3(s) + b HCl_(aq) ==> c FeCl_3(aq) + d H₂O_(l) ? [ab-40]
1. 2 6 2 3
2. 1 6 2 6
3. 1 3 1 3
4. 1 6 2 3
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a MgO_(s) + b HCl_(aq) ==> c MgCl_2(aq) + d H₂O_(l) ? [ab-41]
1. 1 2 1 1
2. 1 1 1 1
3. 2 2 1 2
4. 1 4 1 2
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Mg(OH)_2(s) + b H₂SO_4(aq) ==> c MgSO_4(aq) + d H₂O_(l) ? [ab-42]
1. 1 2 1 1
2. 1 1 1 2
3. 2 2 1 2
4. 1 4 1 2
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a Li₂O_(s) + b HCl_(aq) ==> c LiCl_(aq) + d H₂O_(l) ? [ab-43]
1. 1 2 1 1
2. 1 1 1 1
3. 1 2 2 1
4. 1 2 1 2
Which quantities a, b, c and d are required to balance the equation ... (note that '1's would not be shown in the equation)
a KOH_(aq) + b H₂SO_4(aq) ==> c K₂SO_4(aq) + d H₂O_(l) ? [ab-44]
1. 1 2 1 1
2. 1 1 1 1
3. 2 2 1 2
4. 2 1 1 2
Which ions do acids always produce in water? [ab-45]
1. H⁺
2. OH^-
3. H₂⁺
4. O^2-
Which ions do alkalis always produce in water? [ab-46]
1. H⁺
2. OH^-
3. H₂⁺
4. O^2-
Which is the correct ionic equation for the neutralisation of an acid and an alkali? [ab-47]
1. 2H⁺_(aq) + O^2-_(aq) ==> 2H₂O_(l)
2. H^-_(aq) + OH⁺_(aq) ==> H₂O_(l)
3. H⁺_(aq) + OH^-_(aq) ==> H₂O_(l)
4. 4H⁺_(aq) + O^2-_(aq) ==> 2H₂O_(l)
When hydrochloric acid is neutralised with sodium hydroxide, which two ions have the highest concentrations in the resulting mixture? [ab-48]
1. H⁺ and OH^-
2. Na⁺ and OH^-
3. H⁺ and Cl^-
4. Na⁺ and Cl^-
Complete the symbol equation:
NH₃ + HCl ==> ...???... [ab-93]
1. NH₄Cl
2. NH₃HCl
3. NH₃Cl
4. NH₃
Complete the symbol equation:
NH₃ + HNO₃ ==> ...???... [ab-94]
1. NH₃HNO₃
2. NH₄NO₃
3. NH₃NO₃
4. NH₄HNO₃
Complete the symbol equation:
2NH₃ + H₂SO₄ ==> ...???... [ab-95]
1. (NH₃)₂HSO₄
2. NH₄₂SO₄
3. (NH₄)₂SO₄
4. NH₄HSO₄
Given the symbol equation:
MgO + 2HCl ==> ???? + H₂O
What is the missing ???? [ab-96]
1. MgCl
2. Mg₂Cl
3. 2MgCl
4. MgCl₂
Given the symbol equation:
Ca(OH)₂ + H₂SO₄ ==> CaSO₄ + ????
What is the missing ???? [ab-97]
1. 2H₂O
2. H₂O
3. 2H₂
4. H₂O₂
Given the symbol equation:
???? + 2HNO₃ ==> Zn(NO₃)₂ + H₂O + CO₂
What is the missing ???? [ab-98]
1. Zn(OH)₂
2. ZnCO₃
3. ZnHCO₃
4. ZnCO₂
Given the symbol equation:
Fe + H₂SO₄ ==> FeSO₄ + ????
What is the missing ???? [ab-99]
1. H₂O
2. HO₂
3. H₂
4. 2H₂
Given the symbol equation:
Na₂CO₃ + 2HCl ==> ???? + H₂O + CO₂
What is the missing ???? [ab-100]
1. NaCl
2. Na₂Cl₂
3. NaCl
4. 2NaCl
The equation shows the formation of sodium sulfate when sodium hydroxide neutralises sulfuric acid ....
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
An acid salt called sodium hydrogensulfate can also be made ...
H2SO4 + NaOH ==> NaHSO4 + H2O
50 cm3 of a sulfuric acid solution was neutralised by 20 cm3 of a sodium hydroxide solution to make sodium sulfate. What volume of sodium hydroxide solution is needed to form sodium hydrogensulfate from the 50cm3 of sulfuric acid? [ab-115]
1. 10 cm3
2. 15 cm3
3. 20 cm3
4. 25 cm3
The equation shows the formation of sodium sulfate when sodium hydroxide neutralises sulfuric acid ....
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
An acid salt called sodium hydrogensulfate can also be made ...
H2SO4 + NaOH ==> NaHSO4 + H2O
100 cm3 of a sulfuric acid solution was neutralised by 40 cm3 of a sodium hydroxide solution to make sodium sulfate. What volume of sodium hydroxide solution is needed to form sodium hydrogensulfate from the 100cm3 of sulfuric acid? [ab-116]
1. 10 cm3
2. 20 cm3
3. 50 cm3
4. 200 cm3
The equation shows the formation of sodium sulfate when sodium hydroxide neutralises sulfuric acid ....
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
An acid salt called sodium hydrogensulfate can also be made ...
H2SO4 + NaOH ==> NaHSO4 + H2O
70 cm3 of a sulfuric acid solution was neutralised by 15 cm3 of a sodium hydroxide solution to make sodium hydrogensulfate. What volume of sodium hydroxide solution is needed to form sodium sulfate from the 70cm3 of sulfuric acid? [ab-117]
1. 35 cm3
2. 20 cm3
3. 30 cm3
4. 40 cm3
The equation shows the formation of sodium sulfate when sodium hydroxide neutralises sulfuric acid ....
H2SO4 + 2NaOH ==> Na2SO4 + 2H2O
An acid salt called sodium hydrogensulfate can also be made ...
H2SO4 + NaOH ==> NaHSO4 + H2O
80 cm3 of a sulfuric acid solution was neutralised by 25 cm3 of a sodium hydroxide solution to make sodium hydrogensulfate. What volume of sodium hydroxide solution is needed to form sodium sulfate from the 80cm3 of sulfuric acid? [ab-118]
1. 40 cm3
2. 20 cm3
3. 25 cm3
4. 50 cm3
Method 1 (left)
Method 2 (above)
The diagrams show two ways of making a salt. Method 1 cannot be used for making transition metal salts because transition metal oxides or hydroxides are ..?.. [ab-119]
1. insoluble in water
2. too coloured to follow the reaction
3. unreactive with acids
4. not bases
Which of the following statements about acids and alkalis is TRUE? [ab-120]
1. hydrogen ions make sodium hydroxide solution alkaline
2. ammonium hydroxide is alkaline due to the presence of OH- ions
3. sulfuric acid is acid because it contains H- ions
4. hydrochloric acid solution is acidic because it contains hydroxide ions
Which of the following statements about acids and alkalis is TRUE? [ab-121]
1. hydrogen ions make sodium hydroxide solution alkaline
2. ammonium hydroxide is alkaline due to the presence of OH+ ions
3. sulfuric acid is acid because it contains H+ ions
4. hydrochloric acid solution is acidic because it contains hydroxide ions
Which of the following statements about acids and alkalis is TRUE? [ab-122]
1. the presence of oxide ions make sodium hydroxide solution alkaline
2. ammonium hydroxide is alkaline due to the presence of OH+ ions
3. sulfuric acid is acid because it contains H- ions
4. hydrochloric acid solution is acidic because it contains hydrogen ions
Which of the following statements about acids and alkalis is TRUE? [ab-123]
1. hydroxide ions make sodium hydroxide solution alkaline
2. ammonium hydroxide is alkaline due to the presence of OH+ ions
3. sulfuric acid is acid because it contains H- ions
4. hydrochloric acid solution is acidic because it contains hydride ions
What word specifically means 'a soluble base'? [ab-124]
1. acid
2. alkali
3. salt
4. dissolves
A molecule of hydrobromic acid (HBr) has one hydrogen that can be replaced by a metal to form a salt. Some acids have two hydrogens that can be replaced. If both hydrogens are replaced the 'normal' salt is formed. If one hydrogen only is replaced, an 'acid' salt is formed. Which of the following can form an acid salt? [ab-125]
1. nitric acid, HNO3
2. hydrochloric acid, HCl
3. carbonic acid, H2CO3
4. hydroiodic acid, HI
A molecule of hydrobromic acid (HBr) has one hydrogen that can be replaced by a metal to form a salt. Some acids have two hydrogens that can be replaced. If both hydrogens are replaced the 'normal' salt is formed. If one hydrogen only is replaced, an 'acid' salt is formed. Which of the following can form an acid salt? [ab-126]
1. nitric acid, HNO3
2. hydrochloric acid, HCl
3. hydriodic acid, HI
4. sulfuric acid, H2SO4
When hydrochloric acid is neutralised with sodium hydroxide, which two ions have the lowest concentrations in the resulting mixture? [ab-127]
1. H⁺ and OH^-
2. Na⁺ and OH^-
3. H⁺ and Cl^-
4. Na⁺ and Cl^-
For reactions to occur, the particles of the reactants must collide. The fewer the collisions that take place, the slower the rate of a reaction. Which DECREASES the frequency of collision between reactant particles? [rr-1]
1. For reactions involving gaseous reactants, decrease the pressure of the gases
2. For reactions involving solutions, raise the concentration of the solution
3. If a solid is reacting with a liquid, break the solid into smaller pieces
4. Raise the temperature of the reaction mixture
For reactions to occur, the particles of the reactants must collide. The fewer the collisions that take place, the slower the rate of reaction. Which DECREASES the frequency of collision between reactant particles? [rr-2]
1. For reactions involving gaseous reactants, increase the pressure of the gases
2. For reactions involving solutions, decrease the concentration of the solution
3. If a solid is reacting with a liquid, break the solid into smaller pieces
4. Raise the temperature of the reaction mixture
For reactions to occur, the particles of the reactants must collide. The fewer the collisions that take place, the slower the rate of reaction. Which INCREASES the frequency of collision between reactant particles? [rr-3]
1. For reactions involving gaseous reactants, decrease the pressure of the gases
2. For reactions involving solutions, decrease the concentration of the solution
3. If a solid is reacting with a liquid, break the solid into smaller pieces
4. Lower the temperature of the reaction mixture
For reactions to occur, the particles of the reactants must collide. The fewer the collisions that take place, the slower the rate of reaction. Which INCREASES the frequency of collision between reactant particles? [rr-4]
1. For reactions involving gaseous reactants, decrease the pressure of the gases
2. For reactions involving solutions, decrease the concentration of the solution
3. If a solid is reacting with a liquid, use large pieces of the solid
4. Increase the temperature of the reaction mixture
Calcium carbonate in the form of limestone dissolves in hydrochloric acid and giving off carbon dioxide gas. Which conditions would produce the fastest reaction? [rr-5]
1. temperature of 40°C and 10cm³ of dilute acid
2. temperature of 20°C and 10cm³ of dilute acid
3. temperature of 40°C and 5cm³ of dilute acid and 5cm³ of water
4. temperature of 20°C and 5cm³ of dilute acid and 5cm³ of water
Calcium carbonate in the form of limestone dissolves in hydrochloric acid and giving off carbon dioxide gas. Which conditions would produce the slowest reaction? [rr-6]
1. temperature of 40°C and 10cm³ of dilute acid
2. temperature of 20°C and 10cm³ of dilute acid
3. temperature of 40°C and 5cm³ of dilute acid and 5cm³ of water
4. temperature of 20°C and 5cm³ of dilute acid and 5cm³ of water
Iron reacts with hydrochloric acid to form iron(II) chloride and hydrogen gas. 2g of iron is added to 100cm³ of dilute hydrochloric acid. Which conditions produces the fastest reaction? [rr-7]
1. iron pieces at 25°C
2. iron pieces at 50°C
3. iron powder at 25°C
4. iron powder at 50°C
Iron reacts with hydrochloric acid to form iron(II) chloride and hydrogen gas. 2g of iron is added to 100cm³ of dilute hydrochloric acid. Which conditions produces the slowest reaction? [rr-8]
1. iron pieces at 25°C
2. iron pieces at 50°C
3. iron powder at 25°C
4. iron powder at 50°C
A group of students carried out an experiment in which they added manganese dioxide to rapidly decompose a solution of hydrogen peroxide. To show that the manganese dioxide was acting as a catalyst, what must they do before and after the experiment? [rr-9]
1. BEFORE: weigh the hydrogen peroxide solution and manganese dioxide in separate containers before mixing
  AFTER: weigh both of the containers again
2. BEFORE: weigh the hydrogen peroxide solution in a beaker and then add the manganese dioxide to the beaker
  AFTER: weigh the beaker and its contents
3. BEFORE: weigh the manganese dioxide and then add the hydrogen peroxide solution to the beaker
  AFTER: weigh the beaker and its contents
4. BEFORE: weigh the manganese dioxide and a dry filter paper
  AFTER: filter the solution, dry the filter paper and the solid residue, weigh the filter paper
When marble chips dissolve in acid, the reaction can be speeded up by? [rr-10]
1. grinding the marble chips
2. lowering the temperature
3. using a larger flask
4. using more dilute acid
When marble chips dissolve in acid, the reaction can be slowed down by? [rr-11]
1. grinding the marble chips
2. lowering the temperature
3. using a larger flask
4. using more dilute acid
Copper(II) oxide catalyses the decomposition of hydrogen peroxide to form oxygen.
In acting as a catalyst the copper(II) oxide? [rr-12]
1. causes the decomposition to begin
2. increases the total amount of oxygen formed
3. increases the rate at which oxygen is formed
4. prevents the decomposition of the oxygen formed
Which mixture will enable the fastest reaction to take place between solid calcium carbonate (marble chips) and dilute hydrochloric acid? [rr-13]
1. large chips, concentrated acid, low temperature
2. low temperature, small chips, dilute acid
3. concentrated acid, high temperature, small chips
4. high temperature, small chips, dilute acid
Which mixture will produce the slowest reaction to take place between solid calcium carbonate (marble chips) and dilute hydrochloric acid? [rr-14]
1. large chips, concentrated acid, low temperature
2. low temperature, large chips, dilute acid
3. concentrated acid, high temperature, small chips
4. high temperature, small chips, dilute acid
Platinum catalyses the reaction between sulfur dioxide SO₂ and oxygen O₂ to form sulfur trioxide SO₃. Which of the statements 1, 2 or 3 is/are correct? [rr-15]
1. more sulfur trioxide is formed when more catalyst is used
2. the catalyst increases the rate of reaction between sulfur dioxide and oxygen
3. when the reaction is complete the platinum catalyst has not lost any mass
1. 1 and 2
2. 1 and 3
3. 2 and 3
4. 1, 2 and 3
Platinum catalyses the reaction between sulfur dioxide SO₂ and oxygen O₂ to form sulfur trioxide SO₃. Which statement(s) 1, 2 or 3 is NOT correct? [rr-16]
1. less sulfur trioxide is formed when more catalyst is used
2. the catalyst decreases the rate of reaction between sulfur dioxide and oxygen
3. when the reaction is complete the platinum catalyst has gained mass
1. only 1
2. only 1 and 3
3. only 2 and 3
4. 1, 2 and 3
The rate of reaction between acid and marble chips can be decreased by? [rr-17]
1. warming
2. stirring
3. using larger chips
4. using more acid
A small quantity of marble chips is added to a large excess acid. Carbon dioxide gas is formed. Which will double the amount of carbon dioxide formed? [rr-18]
1. mass of acid
2. mass of marble chips
3. mass of water
4. volume of acid
Limestone reacts with hydrochloric acid to produce carbon dioxide. A student set up four experiments A to D. Which experiment would you expect to go the fastest? [rr-19]
1. limestone powder, dilute acid at 20°C
2. limestone lumps, dilute acid at 40°C
3. limestone lumps, concentrated acid at 20°C
4. limestone powder, concentrated acid at 40°C
Limestone reacts with hydrochloric acid to produce carbon dioxide. A student set up four experiments A to D. Which experiment would you expect to go the slowest? [rr-20]
1. limestone powder, dilute acid at 20°C
2. limestone lumps, dilute acid at 20°C
3. limestone lumps, concentrated acid at 40°C
4. limestone powder, concentrated acid at 40°C
A small quantity of calcium carbonate is added to a large excess acid. Carbon dioxide gas is formed. Which of the following will halve the amount of carbon dioxide formed? [rr-21]
1. doubling the temperature of the acid
2. doubling the volume of acid
3. halving the mass of the acid
4. halving the mass of the calcium carbonate
Sodium thiosulfate solution reacts with hydrochloric acid to form sodium chloride, sulfur dioxide, sulfur and water. The reaction can be followed by measuring the time it takes for enough of the sulfur precipitate to form to obscure a black cross marked on white paper. Which will decrease the time it takes for the black cross to disappear? [rr-22]
1. increase the concentration of the hydrochloric acid
2. decrease the concentration of the sodium thiosulfate
3. cool the mixture
4. add more water to the mixture
Sodium thiosulfate solution reacts with hydrochloric acid to form sodium chloride, sulfur dioxide, sulfur and water. The reaction can be followed by measuring the time it takes for enough of the sulfur precipitate to form to obscure a black cross marked on white paper. Which will decrease the time it takes for the black cross to disappear? [rr-23]
1. decrease the concentration of the hydrochloric acid
2. increase the concentration of the sodium thiosulfate
3. cool the mixture
4. add more water to the mixture
Sodium thiosulfate solution reacts with hydrochloric acid to form sodium chloride, sulfur dioxide, sulfur and water. The reaction can be followed by measuring the time it takes for enough of the sulfur precipitate to form to obscure a black cross marked on white paper. Which will decrease the time it takes for the black cross to disappear? [rr-24]
1. decrease the concentration of the hydrochloric acid
2. decrease the concentration of the sodium thiosulfate
3. heat the mixture
4. add more water to the mixture
An experiment was carried out at a temperature of 25^oC by dissolving 0.2g of small limestone granules into 30cm³ of hydrochloric acid. The acid concentration was 1.0 mol/dm³ and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using 0.2g of limestone lumps. Which of the graphs W, X, Y or Z might you expect for the results? [rr-25]
1. graph line W
2. graph line X
3. graph line Y
4. graph line Z
An experiment was carried out at a temperature of 25^oC by dissolving 0.2g of small limestone granules into 30cm³ of hydrochloric acid. The acid concentration was 1.0 mol/dm³ and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using 0.4g of the same limestone granules. Which of the graphs W, X, Y or Z might you expect for the results? [rr-26]
1. graph line W
2. graph line X
3. graph line Y
4. graph line Z
An experiment was carried out at a temperature of 25^oC by dissolving 0.2g of small limestone granules into 30cm³ of hydrochloric acid. The acid concentration was 1.0 mol/dm³ and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using acid of 2.0mol/dm³ concentration. Which of the graphs W, X, Y or Z might you expect for the results? [rr-27]
1. graph line W
2. graph line X
3. graph line Y
4. graph line Z
An experiment was carried out at a temperature of 25^oC by dissolving 0.2g of small limestone granules into 30cm³ of hydrochloric acid. The acid concentration was 1.0 mol/dm³ and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using 0.1g of the same limestone granules. Which of the graphs W, X, Y or Z might you expect for the results? [rr-28]
1. graph line W
2. graph line X
3. graph line Y
4. graph line Z
An experiment was carried out at a temperature of 25^oC by dissolving 0.2g of small limestone granules into 30cm³ of hydrochloric acid. The acid concentration was 1.0 mol/dm³ and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but at a temperature of 50^oC. Which of the graphs W, X, Y or Z might you expect for the results? [rr-29]
1. graph line W
2. graph line X
3. graph line Y
4. graph line Z
An experiment was carried out at a temperature of 25^oC by dissolving 0.2g of small limestone granules into 30cm³ of hydrochloric acid. The acid concentration was 1.0 mol/dm³ and in excess so all the limestone dissolved. The reaction was followed by measuring the volume of carbon dioxide given off over a period of 6 minutes. A 2nd experiment was done in an identical manner but using acid of 0.5mol/dm³ concentration. Which of the graphs W, X, Y or Z might you expect for the results? [rr-30]
1. graph line W
2. graph line X
3. graph line Y
4. graph line Z
Which will react the fastest with hydrochloric acid? [rr-31]
1. marble chips at 40^oC
2. marble chips at 25^oC
3. powdered marble at 40^oC
4. powdered marble at 25^oC
Which will react the slowest with hydrochloric acid? [rr-32]
1. marble chips at 40^oC
2. marble chips at 25^oC
3. powdered marble at 40^oC
4. powdered marble at 25^oC
An acid reacts with some tablets. The rate of reaction is decreased by? [rr-33]
1. cooling the tablets and the acid
2. crushing the tablets before adding the acid
3. stirring the tablets in the acid
4. using a more concentrated acid
A catalyst can increase the rate of a chemical reaction.
Which of the following is also TRUE about catalysts? [rr-34]
1. their appearance is unchanged at the end of the reaction
2. they have to be a metal
3. they have to be a solid
4. they are chemically the same at the end of the reaction
A large amount of calcium carbonate (excess) is added to a small amount of dilute hydrochloric acid. Which will double the volume of carbon dioxide finally formed? [rr-35]
1. doubling the mass of calcium carbonate
2. doubling the volume of the hydrochloric acid
3. halving the mass of the hydrochloric acid
4. doubling the temperature
A large amount of calcium carbonate (excess) is added to a small amount of dilute hydrochloric acid. Which will double the volume of carbon dioxide finally formed? [rr-36]
1. doubling the mass of calcium carbonate
2. halving the volume of the hydrochloric acid
3. doubling the temperature
4. doubling the concentration of the acid
A large amount of calcium carbonate (excess) is added to a small amount of dilute hydrochloric acid. Which will halve the volume of carbon dioxide finally formed? [rr-37]
1. halving the mass of calcium carbonate
2. halving the volume of the hydrochloric acid
3. halving the temperature
4. doubling the concentration of the acid
A large amount of calcium carbonate (excess) is added to a small amount of dilute hydrochloric acid. Which will halve the volume of carbon dioxide finally formed? [rr-38]
1. doubling the mass of calcium carbonate
2. doubling the volume of the hydrochloric acid
3. halving the temperature
4. halving the concentration of the acid
Potatoes cook more quickly in boiling vegetable oil than in boiling water. This is because oil? [rr-39]
1. boils at a higher temperature than water
2. catalyses the cooking process
3. contains water
4. replaces the water in the potatoes
In a rates experiment the following carbon dioxide gas volumes were recorded by a student resulting from an acid-limestone reaction. The gas volume of CO₂ formed at 1.5 min was omitted by accident.
time (min) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Vol (cm³) 0 8 15 ? 26 30 33 36 38 39 40 40 40
What is the most likely value of the missing reading in cm³ of carbon dioxide? [rr-40]
1. 18
2. 21
3. 23
4. 24
In a rates experiment the following carbon dioxide gas volumes were recorded by a student resulting from an acid-limestone reaction.
time (min) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Vol (cm³) 0 8 15 21 26 30 33 36 38 39 40 40 40
At what time did the reaction stop? [rr-41]
1. 4.5 min
2. 6.0 min
3. 5.0 min
4. 5.5 min
In a rates experiment the following carbon dioxide gas volumes were recorded by a student resulting from an acid-limestone reaction.
time (min) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Vol (cm³) 0 8 15 21 26 30 33 36 38 39 40 40 40
At what approximate time is the speed of the reaction 8cm³gas/min? [rr-42]
1. 2.0 to 2.5 min
2. 0.0 t0 0.5 min
3. 1.0 to 1.5 min
4. 5.0 to 5.5 min
A gas was produced in a chemical reaction. The total volume of gas formed was measured at regular time intervals. Which graph would you expect the results to be like? [rr-43]
1. graph Q
2. graph W
3. graph Y
4. graph Z
Which is a chemical test for the gas hydrogen? [rr-44]
1. pops with lit splint
2. turns limewater cloudy
3. relights a glowing splint
4. bleaches damp litmus paper
Which is a chemical test for the gas carbon dioxide? [rr-45]
1. pops with a lit splint
2. turns limewater cloudy
3. relights a glowing splint
4. bleaches damp litmus paper
Which is a chemical test for the gas oxygen? [rr-46]
1. pops with a lit splint
2. turns limewater cloudy
3. relights a glowing splint
4. bleaches damp litmus paper
Which is a chemical test for the gas chlorine? [rr-47]
1. pops with a lit splint
2. turns limewater cloudy
3. relights a glowing splint
4. bleaches damp litmus paper
Which of the following gases is formed when a metal reacts with an acid? [rr-48]
1. hydrogen
2. carbon dioxide
3. oxygen
4. chlorine
Which of the following gases is formed when an acid reacts with a carbonate? [rr-49]
1. hydrogen
2. carbon dioxide
3. oxygen
4. chlorine
Which of the following is formed when a metal reacts with an acid? [rr-50]
1. O₂
2. Cl₂
3. H₂
4. CO₂
Which of the following is formed when a carbonate reacts with an acid? [rr-51]
1. O₂
2. Cl₂
3. H₂
4. CO₂
A solid was produced in a chemical reaction. The total mass of solid formed was measured at regular time intervals. Which graph would you expect the results to be like? [rr-52]
1. graph Y
2. graph W
3. graph Q
4. graph Z
A solid and a liquid reacted to produce a solution. The mass of the solid reactant was measured at regular time intervals. Which graph would you expect the results to be like? [rr-53]
1. graph W
2. graph Q
3. graph Y
4. graph Z
Two solids were heated and reacted to form another solid. The total mass of the solids was measured at regular time intervals. Which graph would you expect the results to be like? [rr-54]
1. graph W
2. graph Q
3. graph Y
4. graph Z
On mixing two reacting solutions a solid precipitate was formed. The mass of the solid precipitate was measured at regular time intervals. Which graph would you expect the results to be like? [rr-55]
1. graph W
2. graph Q
3. graph Y
4. graph Z
Limestone chips were reacted with acid in a beaker placed on a one pan electric balance. The mass of the reacting mixture was measured at regular time intervals. Which graph would you expect the results to be like? [rr-56]
1. graph W
2. graph Q
3. graph Y
4. graph Z
An experiment was carried out to dissolve small limestone granules into hydrochloric acid. Carbon dioxide gas is formed and was collected in a gas syringe. The initial results are marked as the 'original experiment'. The experiment was repeated after varying the reaction conditions (ie mass of limestone, size of limestone pieces, temperature or acid concentration). The speed of the reaction can be given in cm³/min, ie the speed at which carbon dioxide is formed. Which experiment is going at an approximate average speed of 30 cm³/min in the first half minute of the reaction? [rr-57]
1. graph line for experiment W
2. graph line for experiment X
3. graph line for experiment Y
4. graph line for experiment Z
An experiment was carried out to dissolve small limestone granules into hydrochloric acid. Carbon dioxide gas is formed and was collected in a gas syringe. The initial results are marked as the 'original experiment'. The experiment was repeated after varying the reaction conditions (ie mass of limestone, size of limestone pieces, temperature or acid concentration). The speed of the reaction can be given in cm³/min, ie the speed at which carbon dioxide is formed. Which experiment is going at an approximate average speed of 22 cm³/min in the first half minute of the reaction? [rr-58]
1. graph line for experiment W
2. graph line for experiment X
3. graph line for experiment Y
4. graph line for experiment Z
An experiment was carried out to dissolve small limestone granules into hydrochloric acid. Carbon dioxide gas is formed and was collected in a gas syringe. The initial results are marked as the 'original experiment'. The experiment was repeated after varying the reaction conditions (ie mass of limestone, size of limestone pieces, temperature or acid concentration). The speed of the reaction can be given in cm³/min, ie the speed at which carbon dioxide is formed. Which experiment is going at an approximate average speed of 6 cm³/min in the first minute of the reaction? [rr-59]
1. graph line for experiment W
2. graph line for experiment X
3. graph line for experiment Y
4. graph line for experiment Z
An experiment was carried out to dissolve small limestone granules into hydrochloric acid. Carbon dioxide gas is formed and was collected in a gas syringe. The initial results are marked as the 'original experiment'. The experiment was repeated after varying the reaction conditions (ie mass of limestone, size of limestone pieces, temperature or acid concentration). The speed of the reaction can be given in cm³/min, ie the speed at which carbon dioxide is formed. Which experiment is going at an approximate average speed of 3 cm³/min in the first minute of the reaction? [rr-60]
1. graph line for experiment W
2. graph line for experiment X
3. graph line for experiment Y
4. graph line for experiment Z
What would you increase, to increase the kinetic energy of particles involved in a chemical reaction? [rsa-1]
What would you decrease, to decrease the kinetic energy of particles involved in a chemical reaction? [rsa-2]
What must particles do with each other before they can react? [rsa-3]
What do you increase to make two gases react together faster at the same temperature? [rsa-4]
What do you decrease to make two gases react together more slowly at the same temperature? [rsa-5]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). Which of 1 to 5 is seen as the 'fizzing'? [rsa-6]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). Which of 1 to 5 is the 'salt' in the reaction? [rsa-7]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). Which of 1 to 5 has the formula HCl? [rsa-8]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). Which of 1 to 5 has the formula CaCO₃? [rsa-9]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). Which of 1 to 5 has the formula CaCl₂? [rsa-10]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). In what form would you add the marble to speed up the reaction? [rsa-11]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). In what form would you add the marble to slow down the reaction? [rsa-12]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). What could you reduce for the acid to slow the reaction down at the same temperature? [rsa-13]
Limestone or marble chips are made of the chemical calcium carbonate (1). They both dissolve in hydrochloric acid (2), to produce a solution of calcium chloride (3), water (4) and carbon dioxide (5). What could you increase for the acid to speed up the reaction at the same temperature? [rsa-14]
Calcium carbonate (limestone) were dissolved in hydrochloric acid under five different experimental conditions.

The carbon dioxide gas formed was collected in a gas syringe and the total volume of gas was recorded for the first six minutes.

The speed or 'rate of reaction' can be expressed as the rate of formation of carbon dioxide in cm³/min.

What is the average speed of the reaction in experiment W between 1 and 2 minutes in cm³/min? [rsa-15]
Calcium carbonate (limestone) were dissolved in hydrochloric acid under five different experimental conditions.

The carbon dioxide gas formed was collected in a gas syringe and the total volume of gas was recorded for the first six minutes.

The speed or 'rate of reaction' can be expressed as the rate of formation of carbon dioxide in cm³/min.

What is the average speed of the reaction in experiment X in the first half minute in cm³/min? [rsa-16]
This means a chemical reaction is? [am-1]
1. reversible
2. exothermic
3. endothermic
4. decomposition
A reaction which gives out heat to the surroundings is described as? [am-2]
1. reversible
2. exothermic
3. endothermic
4. decomposition
A reaction which takes in heat from the surroundings is described as? [am-3]
1. reversible
2. exothermic
3. endothermic
4. decomposition
For a chemical reaction, the word 'reversible' means? [am-4]
1. heat is alternately given out and taken in as the reaction proceeds
2. reactants can only be converted to products
3. the products and reactants of a reaction are in a state of balance
4. products can be readily converted back to reactants
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-5]
1. from left to right is called the forward reaction
2. from right to left is called the equilibrium reaction
3. if left to right is exothermic, from right to left is also exothermic
4. if left to right is endothermic, from right to left is also endothermic
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-6]
1. from left to right is called the reversible reaction
2. from right to left is called the backward reaction
3. if left to right is exothermic, from right to left is also exothermic
4. if left to right is endothermic, from right to left is also endothermic
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-7]
1. from left to right is called the reversible reaction
2. from right to left is called the equilibrium reaction
3. if left to right is exothermic, from right to left is endothermic
4. if left to right is endothermic, from right to left is also endothermic
A + B C + D
For the type of reaction shown above, which statement is TRUE? [am-7]
1. from left to right is called the reversible reaction
2. from right to left is called the equilibrium reaction
3. if left to right is exothermic, from right to left is also exothermic
4. if left to right is endothermic, from right to left is exothermic
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-9]
1. the gases formed are colourless
2. the formation of the solid is endothermic
3. ammonium gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-10]
1. the gases formed are colourless and green
2. the formation of the solid is exothermic
3. ammonium gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-11]
1. the gases formed are colourless and green
2. the formation of the solid is endothermic
3. ammonia gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-12]
1. the gases formed are colourless and green
2. the formation of the solid is endothermic
3. ammonium gas is formed
4. hydrogen chloride gas is formed
The equation shows the effect of heat on the salt ammonium chloride. Which statement is TRUE about this reversible reaction? [am-13]
1. the gases are formed by an endothermic reaction
2. the formation of the solid is a decomposition reaction
3. ammonium gas is formed
4. chloride gas is formed
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-14]
1. the forward reaction (L to R) is exothermic
2. on heating, the hydrated solid changes colour from blue to white
3. the heating effect can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-15]
1. the forward reaction (L to R) is exothermic
2. on heating, the hydrated solid changes colour from white to blue
3. the reverse reaction can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-16]
1. the forward reaction (L to R) is exothermic
2. on heating, the hydrated solid changes colour from white to blue
3. the heating effect can be used as a test for water
4. the reaction is reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-17]
1. the forward reaction (L to R) is endothermic
2. on cooling the heated solid and adding water, it changes colour from blue to white
3. the heating effect can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-18]
1. the reverse reaction (R to L) is endothermic
2. on cooling the heated solid and adding water, it changes colour from white to blue
3. the heating effect can be used as a test for water
4. the reaction is not reversible
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-19]
1. the forward reaction (L to R) is exothermic
2. on cooling the heated solid and adding water, it changes colour from blue to white
3. the reverse reaction (R to L) is exothermic
4. the heating effect can be used as a test for water
The equation shows the effect of heat on the salt hydrated copper(II) sulfate. Which statement is TRUE about this reversible reaction? [am-20]
1. the forward reaction (L to R) is exothermic
2. on cooling the heated solid and adding water, it changes colour from blue to white
3. the reverse reaction (R to L) is endothermic
4. the heating effect can be used to make anhydrous copper(II) sulfate
If J is nitrogen, what is raw material E? [am-21]
1. air
2. water
3. methane
4. nitrogen monoxide
If E is air, gas J is? [am-22]
1. oxygen
2. nitrogen
3. methane
4. nitrogen monoxide
If G is methane and water, gas L is? [am-23]
1. oxygen
2. nitrogen
3. hydrogen
4. nitrogen monoxide
If L is hydrogen, raw materials G are? [am-24]
1. water and carbon dioxide
2. nitrogen and hydrogen
3. methane and oxygen
4. water and methane (natural gas)
Catalyst M is? [am-25]
1. iron
2. platinum
3. manganese dioxide
4. Devarda's alloy
Gas Q is? [am-26]
1. carbon monoxide
2. nitrogen monoxide
3. hydrogen
4. nitrogen
Acid R is? [am-27]
1. hydrochloric acid
2. ethanoic acid
3. nitric acid
4. sulfuric acid
Acid W is? [am-28]
1. hydrochloric acid
2. ethanoic acid
3. nitric acid
4. sulfuric acid
Salt T is? [am-29]
1. ammonium nitrate
2. sodium nitrate
3. ammonium chloride
4. sodium amide
After the gases are cooled and compressed, the ammonia separates by? [am-30]
1. crystallisation
2. condensation
3. distillation
4. filtration
Which is used as an artificial fertiliser? [am-31]
1. nitric acid
2. sodium sulfate
3. ammonium sulfate
4. ammonium hydroxide
Which is used as an artificial fertiliser? [am-32]
1. nitric acid
2. sodium sulfate
3. ammonium hydroxide
4. ammonium nitrate
Which of the following is nitrogen gas? [am-33]
Which of the following is ammonia gas? [am-34]
Which of the following is methane gas? [am-35]
Which of the following is a nitrogen oxide? [am-36]
Which of the following is nitric acid? [am-37]
Which of the following is ammonium sulfate? [am-38]
Which of the following is ammonium nitrate? [am-39]
Which of the following is sulfuric acid? [am-40]
How many different elements make ammonium nitrate? [am-41]
1. 3
2. 9
3. 4
4. 6
How many atoms make up the formula of ammonium nitrate? [am-42]
1. 3
2. 9
3. 4
4. 6
How many different elements make up ammonium sulfate? [am-43]
1. 3
2. 5
3. 4
4. 6
How many atoms make up the formula of ammonium sulfate? [am-44]
1. 4
2. 7
3. 11
4. 15
Which is the most important element plants require from an artificial fertiliser like ammonium sulfate? [am-45]
1. N
2. H
3. S
4. O
Approximately what % of air is nitrogen? [am-46]
1. 20%
2. 80%
3. 50%
4. 30%
The name of the industrial method to make ammonia is known as the? [am-47]
1. Contact Process
2. Bosch Synthesis
3. Haber Synthesis
4. Cracking Process
Which of these is a good reason for adding artificial fertiliser to soil? [am-48]
1. helping reduce water pollution
2. neutralising acid soil
3. helping reduce crop disease
4. increasing soil fertility
Which of these is a good reason for adding artificial fertiliser to soil? [am-49]
1. increasing the nitrogen content of soil
2. increasing the alkalinity of soil
3. helping reduce crop disease
4. helping reduce water pollution
Which of these is a problem caused by the over-use of artificial fertilisers like ammonium nitrate on fields of crops? [am-50]
1. too acidic rainwater run-off into rivers
2. pollution of domestic water supply
3. increase in insect attacks on crops
4. increase in crop disease
Which of these is a problem caused by the over-use of artificial fertilisers like ammonium nitrate on fields of crops? [am-51]
1. too acidic rainwater run-off into rivers
2. increase in insect attacks on crops
3. overgrowth of algae in streams and rivers
4. increase in crop disease
Which set of data is typical of the reaction in industry used to make ammonia in terms of temperature and pressure? [am-52]
1. 50^oC, 200 atmospheres
2. 150^oC, 20 atmospheres
3. 900^oC, 2000 atmospheres
4. 450^oC, 200 atmospheres
Which chemical change involves an oxidation of a nitrogen compound? [am-53]
1. ammonia + oxygen ==> nitrogen monoxide + water
2. ammonia + nitric acid ==> ammonium nitrate
3. methane + water ==> carbon monoxide + hydrogen
4. ammonium chloride ==> ammonia + hydrogen chloride
Which chemical change is a neutralisation reaction? [am-54]
1. ammonia + oxygen ==> nitrogen monoxide + water
2. ammonia + nitric acid ==> ammonium nitrate
3. methane + water ==> carbon monoxide + hydrogen
4. ammonium chloride ==> ammonia + hydrogen chloride
Which chemical change is a neutralisation reaction? [am-55]
1. ammonia + oxygen ==> nitrogen monoxide + water
2. methane + water ==> carbon monoxide + hydrogen
3. sulfuric acid + ammonia ==> ammonium sulfate
4. ammonium chloride ==> ammonia + hydrogen chloride
Which chemical change is a thermal decomposition reaction? [am-56]
1. ammonia + oxygen ==> nitrogen monoxide + water
2. ammonia + nitric acid ==> ammonium nitrate
3. methane + water ==> carbon monoxide + hydrogen
4. ammonium chloride ==> ammonia + hydrogen chloride
The in the equation means the reaction is? [am-57]
1. reversible
2. decomposable
3. combustible
4. unpredictable
In the synthesis of ammonia what happens to the unreacted nitrogen and hydrogen? [am-58]
1. purified and let out into the atmosphere without causing pollution
2. recycled through the reaction chamber immediately
3. collected and stored for later ammonia production
4. burned to preheat the gases coming into the hot reactor to stop it cooling down
Ammonia is converted into the useful chemical product? [am-59]
1. nitrogen monoxide
2. nitrogen
3. nitric acid
4. nitromethane
Ammonia is converted into the useful chemical product? [am-60]
1. nitrogen monoxide
2. nitrogen
3. sodium sulfate
4. ammonium sulfate
Ammonia is converted into the useful chemical product? [am-61]
1. ammonium nitrate
2. nitrogen
3. nitromethane
4. nitrogen monoxide
A simple test for ammonia is? [am-62]
1. gives a squeaky pop! with a lit splint
2. turns damp red litmus blue
3. re-ignites a glowing splint
4. turns limewater milky
Ammonia dissolved in water is best described as a? [am-63]
1. weak acid solution
2. neutral salt solution
3. weak alkali solution
4. strong acid solution
The reaction to convert ammonia into artificial fertiliser salts, is an example of? [am-64]
1. oxidation
2. decomposition
3. equilibrium
4. neutralisation
On the reaction profile diagrams above, which energy change corresponds to the uncatalysed activation energy for the endothermic thermal decomposition of ammonium chloride? [am-65]
1. profile 1, E1
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the overall heat absorbed by the catalysed endothermic thermal decomposition of ammonium chloride? [am-66]
1. profile 1, E1
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the activation energy for the iron catalysed exothermic formation of ammonia? [am-67]
1. profile 1, E1
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the overall energy change for the iron catalysed exothermic formation of ammonia? [am-68]
1. profile 1, E2
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the activation energy for the catalysed endothermic decomposition of ammonium chloride? [am-69]
1. profile 1, E2
2. profile 1, E3
3. profile 2, E5
4. profile 2, E6
On the reaction profile diagrams above, which energy change corresponds to the activation energy for the uncatalysed exothermic formation of ammonia? [am-70]
1. profile 1, E2
2. profile 2, E4
3. profile 1, E3
4. profile 2, E5
On the reaction profile diagrams above, which energy change corresponds to the overall energy change for the uncatalysed endothermic thermal decomposition ammonium chloride? [am-71]
1. profile 1, E2
2. profile 2, E4
3. profile 1, E3
4. profile 2, E5
On the reaction profile diagrams above, which energy change corresponds to the overall energy change for the uncatalysed exothermic formation of ammonia? [am-72]
1. profile 1, E2
2. profile 2, E4
3. profile 1, E3
4. profile 2, E6
[am-73] Which ratio numbers a, b and c are needed to balance the equation showing the formation of ammonia?
a N_2(g) + b H_2(g) ==> c NH_3(g)
1. 1, 3 and 2
2. 2, 3 and 2
3. 1, 6 and 2
4. 2, 3 and 6
[am-74] Which ratio numbers a, b, c and d are needed to balance the equation showing the oxidation of ammonia to nitrogen monoxide?
a NH_3(g) + b O_2(g) ==> c NO_(g) + d H₂O_(g)
1. 4, 5, 2 and 3
2. 4, 5, 4 and 6
3. 2, 3, 4 and 6
4. 2, 3, 2 and 3
[am-75] Which ratio numbers a, b, c and d are needed to balance the equation showing the overall conversion of nitrogen monoxide into nitric acid?
a NO_(g) + b H₂O_(l)+ c O_2(g) ==> d HNO_3(aq)
1. 2, 2, 3 and 4
2. 2, 4, 6 and 3
3. 4, 2, 3 and 4
4. 4, 4, 6 and 3
[am-76] Which ratio numbers a, b and c are needed to balance the equation showing the neutralisation of ammonia to form ammonium sulfate?
a NH_3(aq) + b H₂SO_4(aq) ==> c(NH₄)₂SO_4(aq)
1. 1, 1 and 2
2. 2, 2 and 1
3. 1, 2 and 2
4. 2, 1 and 1
[am-77] Which ratio numbers a, b and c are needed to balance the equation showing the neutralisation of ammonia to form ammonium nitrate?
a NH_3(aq) + b HNO_3(aq) ==> c NH₄NO_3(aq)
1. 1, 1 and 1
2. 2, 2 and 1
3. 1, 1 and 2
4. 2, 1 and 2
[am-78] Which ratio numbers a, b, c and d are needed to balance the equation showing the production of hydrogen from methane (natural gas) and steam?
a CH_4(g) + b H₂O_(g) ==> c CO_(g) + d H_2(g)
1. 2, 2, 2 and 3
2. 1, 1, 1 and 3
3. 1, 2, 2 and 6
4. 2, 1, 1, and 3
Which is TRUE about the industrial synthesis of ammonia? [am-79]
1. the reaction is exothermic, so there are little energy costs in running the chemical plant
2. it is difficult to separate the ammonia from unreacted hydrogen and nitrogen because they have similar boiling or condensation points
3. it is more economic to get a low % of nitrogen/hydrogen mixture conversion to ammonia fast, than a high % yield more slowly
4. it is a costly process because it is an equilibrium reaction and you cannot get 100% conversion to ammonia
Which is TRUE about the industrial synthesis of ammonia? [am-80]
1. the reaction is exothermic, so there are little energy costs in running the chemical plant
2. it is difficult to separate the ammonia from unreacted hydrogen and nitrogen because they have similar boiling or condensation points
3. it is less economic to get a low % of nitrogen/hydrogen mixture conversion to ammonia fast, than wait longer for a high % yield of ammonia
4. it is a reasonably economic process because although it is an equilibrium reaction, you can get a low % conversion to ammonia fast and recycle unreacted nitrogen and hydrogen
Which is needed to bring about the conversion of nitrogen monoxide into nitric acid? [am-81]
1. oxygen and water
2. oxygen and hot platinum catalyst
3. hot iron catalyst and high pressure
4. water and an acid
Which is needed to bring about the conversion of ammonia into nitrogen monoxide? [am-82]
1. oxygen and water
2. oxygen and hot platinum catalyst
3. hot iron catalyst and high pressure
4. water and an acid
Which is needed to bring about the conversion of nitrogen and hydrogen into ammonia? [am-83]
1. oxygen and water
2. oxygen and hot platinum catalyst
3. hot iron catalyst and high pressure
4. water and an acid
Which is needed to bring about the conversion of ammonia into fertiliser salts? [am-84]
1. oxygen and water
2. oxygen and hot platinum catalyst
3. hot iron catalyst and high pressure
4. water and an acid
Which is TRUE about reversible reactions and chemical equilibrium? [am-85]
1. increase in temperature favours an endothermic reaction
2. decrease in temperature favours the reaction absorbing heat
3. increase in pressure favours a reaction forming the most gas molecules
4. decrease in pressure favours a reaction that removes gas molecules
Which is TRUE about reversible reactions and chemical equilibrium? [am-86]
1. increase in temperature favours the heat releasing reaction
2. decrease in temperature favours an exothermic reaction
3. increase in pressure favours a reaction forming gas molecules
4. decrease in pressure favours the reaction forming the least gas molecules
Which is TRUE about reversible reactions and chemical equilibrium? [am-87]
1. increase in temperature favours the heat releasing reaction
2. decrease in temperature favours an endothermic reaction
3. increase in pressure favours the reaction forming the least gas molecules
4. decrease in pressure does not favour a reaction forming gas molecules
Which is TRUE about reversible reactions and chemical equilibrium? [am-88]
1. increase in temperature favours an exothermic reaction
2. decrease in temperature favours a heat absorbing reaction
3. increase in pressure favours a reaction forming gas molecules
4. decrease in pressure favours the reaction forming the most gas molecules
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-89]
1. increased pressure favours a larger % of ammonia in the equilibrium mixture
2. decrease in temperature does not favour a larger % of ammonia in the equilibrium mixture
3. using a catalyst increases the % of ammonia in the equilibrium mixture
4. increasing both pressure and temperature favour ammonia formation
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-90]
1. increased pressure does not favour a larger % of ammonia in the equilibrium mixture
2. decrease in temperature favours a larger % of ammonia in the equilibrium mixture
3. using a catalyst increases the % of ammonia in the equilibrium mixture
4. increasing both pressure and temperature favour ammonia formation
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-91]
1. decreased pressure favours a larger % of ammonia in the equilibrium mixture
2. increase in temperature favours a larger % of ammonia in the equilibrium mixture
3. using a catalyst does not affect the % of ammonia in the equilibrium mixture
4. decreasing both pressure and temperature favour ammonia formation
The equation shows the synthesis of ammonia in which 46 kJ heat energy is released (given out) per mole of ammonia formed. Which is TRUE about this reaction? [am-91]
1. decreased pressure favours a larger % of ammonia in the equilibrium mixture
2. increase in temperature favours a larger % of ammonia in the equilibrium mixture
3. using a catalyst increases the % of ammonia in the equilibrium mixture
4. increasing pressure and decreasing temperature both favour ammonia formation
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-93]
1. reactants are always changing into products
2. rate of forward reaction (L to R) is greater than the rate of the backward reaction (R to L)
3. the concentrations of reactants and products are constantly changing
4. using a catalyst increases the final amount of product formed
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-94]
1. products stop changing into reactants
2. rate of forward reaction (L to R) is equal to the rate of the backward reaction (R to L)
3. the concentrations of reactants and products are constantly changing
4. using a catalyst increases the final amount of product formed
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-95]
1. products stop changing into reactants
2. rate of forward reaction (L to R) is greater than the rate of the backward reaction (R to L)
3. the concentrations of reactants and products remain the same
4. using a catalyst increases the final amount of product formed
Which is TRUE about reversible reactions that have formed a chemical equilibrium? [am-96]
1. products stop changing into reactants
2. rate of forward reaction (L to R) is greater than the rate of the backward reaction (R to L)
3. the concentrations of reactants and products are constantly changing
4. using a catalyst does not increase the final amount of product formed
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-97]
1. decreasing the pressure favours a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature does not favour a bigger % of hydrogen in the equilibrium mixture
3. using a catalyst increases the final % of hydrogen in the equilibrium
4. increasing both pressure and temperature favours the formation of ammonia
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-98]
1. decreasing the pressure does not favour a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature favours a bigger % of hydrogen in the equilibrium mixture
3. using a catalyst increases the final % of hydrogen in the equilibrium
4. increasing both pressure and temperature favours the formation of ammonia
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-99]
1. decreasing the pressure does not favour a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature does not favour a bigger % of hydrogen in the equilibrium
3. using a catalyst does not increase the final % of hydrogen in the equilibrium
4. increasing both pressure and temperature favours the formation of ammonia
The equation above shows the making of hydrogen from methane (natural gas) and steam, for the manufacture of ammonia in the Haber Process. For every mole of methane reacted, 206 kJ of heat energy is absorbed (taken in) in forming the three moles of hydrogen. Which is TRUE about this reaction? [am-100]
1. decreasing the pressure does not favour a bigger % of hydrogen in the equilibrium mixture
2. increasing the temperature does not favour a bigger % of hydrogen in the equilibrium
3. using a catalyst increases the final % of hydrogen in the equilibrium
4. decreasing the pressure and increasing the temperature both favour the formation of ammonia
Which chemical change involves an oxidation of a hydrocarbon compound? [am-101]
1. methane + water ==> carbon monoxide + hydrogen
2. ammonia + nitric acid ==> ammonium nitrate
3. ammonia + oxygen ==> nitrogen monoxide + water
4. ammonium chloride ==> ammonia + hydrogen chloride

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time (min)	0.0	0.5	1.0	1.5	2.0	2.5	3.0	3.5	4.0	4.5	5.0	5.5	6.0
Vol (cm³)	0	8	15	?	26	30	33	36	38	39	40	40	40

OCR GCSE 9-1 21st Century Science Chemistry B QUIZ on Topic C6 "Making useful chemicals" (Higher Tier)

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