11 mark
Zinc is extracted from zinc oxide by reduction.
Which element acts a reducing agent during this process?
Hydrogen
Oxygen
Carbon
Zinc
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4.1 Reactivity of Metals
21 mark
A displacement reaction occurs between magnesium and copper(II) sulfate.
What is the correct ionic equation for this reaction?
Mg (s) + Cu2+ (aq) → Mg2+ (aq) + Cu (s)
Mg (s) + Cu2+ (aq) + SO42- (aq) → Mg2+ (aq) + Cu (s) + SO42- (aq)
Mg2+ (aq) + Cu (s) → Mg (s) + Cu2+ (aq)
Mg (aq) + Cu2+ (aq) → Mg2+ (aq) + Cu (aq)
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31 mark
A student observed the reaction between copper(II) sulfate solution and zinc.
Which observations are correct for this reaction?
| Observation 1 | Observation 2 | |
| A | solution colour stays the same | pale grey crystals forming |
| B | solution turns darker blue | grey residue on the metal |
| C | solution turns orange/brown | blue crystals form on the metal |
| D | solution turns paler blue | orange/ brown residue on the metal |
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41 mark
Zinc reacts with hydrochloric acid.
Which statement is not true for this reaction?
A burning splint gives a squeaky pop sound
It is a redox reaction
The reaction is less vigorous than that of iron and hydrochloric acid
A salt is formed
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51 mark
A reaction took place between iron sulfate and magnesium.
iron(II) sulfate + magnesium → magnesium sulfate + iron
Which species has been oxidised?
Iron
Magnesium
Sulfur
None of the above
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61 mark
Which of the following metals can not be extracted from its ore by reduction?
Iron
Zinc
Copper
Lithium
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71 mark
A student was investigating the reactivity of different metals in hydrochloric acid.
What must the student keep constant in this investigation to make it a fair experiment?
| Control variable 1 | Control variable 2 | |
| A | mass of metal | concentration of acid |
| B | volume of acid | length of metal |
| C | size of metal | temperature of acid |
| D | temperature of the room | type of acid |
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81 mark
Some metals are unreactive and exist on their own in the earth.
What are these metals known as?
Transition Metals
Native metals
Alkali Metals
Alkaline earth metals
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