Doc Brown's KS3 Chemistry Quiz Reactivity series of metals predictions methods extraction for AQA KS3 science courses practice questions Edexcel OCR KS3 science courses US grade 6 7 8 science

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 dry 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, formed when sodium reacts with water, 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 electricity
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 have no mobile electrons
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 towards water or oxygen
4. they are poor conductors of electricity because they have no mobile electrons
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 potassium and water containing universal indicator? [9f-45]
1. the products are potassium 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 lithium and water containing universal indicator? [9f-46]
1. the products are lithium oxide and hydrogen
2. the reaction is slow 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 sodium and water containing universal indicator? [9f-47]
1. the products are sodium 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 with water or acids? [9f-57]
1. Gold
2. Sodium
3. Iron
4. Aluminium
Which metal is more reactive than magnesium with water or acids? [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 sulphate 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 sulphate 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 sulphate 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 sulphate 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 might be found in the ground as the free metal itself? [9f-66]
1. copper
2. zinc
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. sulfur
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. boron
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. Iron
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. copper
2. aluminium
3. zinc
4. iron
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 displacement 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 displacement 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 displacement 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 displacement 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 displacement reactions is possible? [9f-82]
1. lead + copper oxide ==> lead oxide + copper
2. copper + hydrochloric acid ==> copper chloride + hydrogen
3. iron + zinc sulfate ==> iron sulphate + zinc
4. lead + tin sulfate ==> lead sulphate + tin
Which of these displacement reactions is possible? [9f-83]
1. lead + zinc oxide ==> lead oxide + zinc
2. zinc + hydrochloric acid ==> zinc chloride + hydrogen
3. tin + zinc sulfate ==> tin sulphate + zinc
4. lead + tin sulfate ==> lead sulphate + tin
Which of these displacement reactions is possible? [9f-84]
1. lead + zinc oxide ==> zinc oxide + copper
2. platinum + sulfuric acid ==> platinum sulphate + hydrogen
3. zinc + iron sulfate ==> zinc sulphate + iron
4. gold + tin chloride ==> gold chloride + tin
Which of these displacement reactions is possible? [9f-85]
1. silver + copper oxide ==> silver oxide + copper
2. copper + sulfuric acid ==> copper sulphate + hydrogen
3. iron + zinc chloride ==> iron chloride + zinc
4. tin + gold sulfate ==> tin sulphate + 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 sulphate solution of another metal
Which will displace iron from iron oxide if metal - iron oxide mixture is heated to a high temperature? [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 iron is used outside, corrosion occurs when the metal is attacked by? [9f-89]
1. oxygen and water
2. hydrogen and water
3. nitrogen and oxygen
4. carbon dioxide and water
When scrap iron is added to blue copper sulphate 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 sulphate 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 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 chemically free 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. sulfur
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 free metal itself and not combined with other elements like oxygen? [9f-112]
1. tin
2. aluminium
3. lead
4. silver
Copper is low enough in the reactivity series to be extracted by heating a copper ore with carbon.
The simplified equation is: 2CuO + C ==> 2Cu + CO₂
[9f-113] Which of the following is oxidised
1. copper
2. carbon
3. copper oxide
4. carbon dioxide
Copper is low enough in the reactivity series to be extracted by heating a copper ore with carbon.
The simplified equation is: 2CuO + C ==> 2Cu + CO₂
[9f-114] Which of the following is reduced
1. copper
2. carbon
3. copper oxide
4. carbon dioxide
Zinc is low enough in the reactivity series to be extracted by heating a zinc ore with carbon.
The simplified equation is: 2ZnO + C ==> 2Zn + CO₂
[9f-115] Which of the following is oxidised
1. zinc
2. carbon
3. zinc oxide
4. carbon dioxide
Zinc is low enough in the reactivity series to be extracted by heating a zinc ore with carbon.
The simplified equation is: 2ZnO + C ==> 2Zn + CO₂
[9f-116] Which of the following is reduced
1. zinc
2. carbon
3. zinc oxide
4. carbon dioxide
[9f-117] If you heat black copper oxide with grey zinc metal powder a white powder is formed on cooling the reaction mixture. The displacement reaction can be expressed as:
CuO + Zn ===> Cu + ZnO
Which of the following is reduced?
1. copper oxide
2. zinc
3. copper
4. zinc oxide
[9f-118] If you heat black copper oxide with grey zinc metal powder a white powder is formed on cooling the reaction mixture. The displacement reaction can be expressed as:
CuO + Zn ===> Cu + ZnO
Which of the following is oxidised?
1. copper oxide
2. zinc
3. copper
4. zinc oxide
Given the following metal extraction equations based on the carbon reduction method,
[9f-119] Which equation is NOT correctly balanced?
1. 2Fe₂O₃ + 2C ==> 4Fe + 2CO₂
2. Fe₃O₄ + 4CO ==> 3Fe + 4CO₂
3. Fe₃O₄ + 2C ==> 3Fe + 2CO₂
4. 2ZnO + C ==> 2Zn + CO₂
Given the following metal extraction equations based on the carbon reduction method,
[9f-120] Which equation is NOT correctly balanced?
1. 2Fe₂O₃ + 3C ==> 4Fe + 3CO₂
2. Fe₃O₄ + 3CO ==> 3Fe + 3CO₂
3. Fe₃O₄ + 2C ==> 3Fe + 2CO₂
4. 2CuO + C ==> 2Cu + CO₂
Given the following metal extraction equations based on the carbon reduction method,
[9f-121] Which equation is NOT correctly balanced?
1. 2Fe₂O₃ + 3C ==> 4Fe + 3CO₂
2. Fe₃O₄ + 4CO ==> 3Fe + 4CO₂
3. Fe₃O₄ + 3C ==> 3Fe + 3CO₂
4. 2ZnO + C ==> 2Zn + CO₂
Given the following metal extraction equations based on the carbon reduction method,
[9f-122] Which equation is NOT correctly balanced?
1. 2Fe₂O₃ + 3C ==> 4Fe + 3CO₂
2. Fe₃O₄ + 4CO ==> 3Fe + 4CO₂
3. Fe₃O₄ + 2C ==> 3Fe + 2CO₂
4. 2ZnO + 2C ==> 2Zn + 2CO₂
Given the following metal extraction equations based on the carbon reduction method,
[9f-123] Which equation is NOT correctly balanced?
1. 2Fe₂O₃ + 3C ==> 4Fe + 3CO₂
2. Fe₃O₄ + 4CO ==> 3Fe + 4CO₂
3. Fe₃O₄ + 2C ==> 3Fe + 2CO₂
4. 2CuO + 2C ==> 2Cu + 2CO₂
[9f-124] Which of the following statements about metals and their extraction is NOT true?
1. The more reactive a metal, the easier it is to extract it from its ore.
2. Most metals are found combined with other elements like oxygen and sulfur.
3. Carbon displaces less reactive metals from their ores.
4. Electrolysis is used to extract more reactive metals from their ores.
[9f-125] Which of the following statements about metals and their extraction is NOT true?
1. The more reactive a metal, the more difficult it is to extract it from its ore.
2. Metals are always found combined with other elements like oxygen and sulfur.
3. Carbon displaces less reactive metals from their ores.
4. Electrolysis is used to extract more reactive metals from their ores.
[9f-126] Which of the following statements about metals and their extraction is NOT true?
1. The more reactive a metal, the more difficult it is to extract it from its ore.
2. Most metals are found combined with other elements like oxygen and sulfur.
3. Carbon displaces the majority of metals from their ores.
4. Electrolysis is used to extract more reactive metals from their ores.
[9f-127] Which of the following statements about metals and their extraction is NOT true?
1. The more reactive a metal, the more difficult it is to extract it from its ore.
2. Most metals are found combined with other elements like oxygen and sulfur.
3. Carbon displaces less reactive metals from their ores.
4. Electrolysis is too expensive to be used to extract many metals on a large scale from their ores.
[9f-128] What number ratios a : b : c : d are needed to correctly balance the equation:
aFe₂O₃ + bC ==> cFe + dCO₂ ?
(Note that if the ratio number is 1, it is assumed and not written in the symbol equation)
1. 2 : 3 : 4 : 3
2. 1 : 3 : 2 : 3
3. 1 : 3 : 4 : 3
4. 2 : 3 : 2 : 3
[9f-129] What number ratios a : b : c : d are needed to correctly balance the equation:
aFe₃O₄ + bCO ==> cFe + dCO₂ ?
(Note that if the ratio number is 1, it is assumed and not written in the symbol equation)
1. 2 : 4 : 6 : 4
2. 1 : 4 : 3 : 4
3. 1 : 2 : 3 : 2
4. 2 : 4 : 3 : 2
[9f-130] What number ratios a : b : c : d are needed to correctly balance the equation:
aFe₃O₄ + bC ==> cFe + dCO₂ ?
(Note that if the ratio number is 1, it is assumed and not written in the symbol equation)
1. 2 : 2 : 6 : 2
2. 1 : 4 : 3 : 4
3. 1 : 2 : 3 : 2
4. 2 : 4 : 3 : 2
Which is likely to be the most exothermic in releasing heat energy reaction? (produces the biggest temperature rise) [9f-131]
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 in releasing heat energy? (produces the smallest temperature rise) [9f-132]
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 in releasing heat energy? (produces the largest temperature rise) [9f-133]
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 in releasing heat energy? (produces the smallest temperature rise) [9f-134]
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
[9f-135] Which is the correct equation for the rusting of iron?
1. iron + oxygen + water ==> hydrated iron oxide
2. iron + water ==> iron oxide
3. iron + water ==> iron hydroxide + hydrogen
4. iron + oxygen ==> iron oxide
[9f-136] Which is the correct equation for the extraction of iron in a blast furnace?
1. iron + water ==> iron oxide + hydrogen
2. iron oxide + carbon ==> iron + carbon dioxide
3. iron hydroxide + carbon ==> iron + carbon monoxide
4. iron hydroxide + carbon monoxide ==> iron + carbon dioxide
[9f-137] A shiny iron nail is dipped into a copper sulfate solution. What might be observed, if anything, and why?
1. a grey deposit on the nail surface because copper is more reactive than iron
2. nothing happens because copper is such an unreactive metal
3. a brown deposit on the nail surface because iron is more reactive than copper
4. bubbles of hydrogen form on the surface of the iron
[9f-187] A shiny piece of copper is dipped into an iron sulfate solution. What might be observed, if anything, and why?
1. a grey deposit on the nail surface because copper is more reactive than iron
2. nothing happens because copper is less reactive than iron
3. a grey deposit on the copper surface because iron is more reactive than copper
4. bubbles of hydrogen form on the surface of the copper

KS3 Chemistry Quiz: Reactivity series of metals and extraction