Lesson 4.4.1.3

4.4.1.3 Extraction of metals and reduction Quiz: AQA Chemistry, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.4.1.3, Extraction of metals and reduction: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 4: Chemical changes, written with Revision Ninja.

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The 20 questions

  1. Why is uncombined gold found naturally in the Earth's crust?

    • It is magnetic
    • It is abundant
    • It is dense
    • It is unreactive

  2. How are metals less reactive than carbon extracted from their metal oxides?

    • Reduction with carbon
    • Oxidation with oxygen
    • Thermal decomposition
    • Electrolysis of solution

  3. What happens to a metal oxide during carbon reduction?

    • It gains oxygen
    • It forms a salt
    • It gains hydrogen
    • It loses oxygen

  4. In the reaction of carbon with iron oxide, which substance is oxidised?

    • Carbon
    • Iron oxide
    • Iron
    • Oxygen

  5. In ZnO + C -> Zn + CO, which substance is oxidised?

    • Zinc oxide
    • Carbon
    • Oxygen
    • Zinc

  6. Why can carbon not be used to extract aluminium from its oxide?

    • Carbon is a liquid
    • Aluminium contains no oxygen
    • Aluminium is less reactive
    • Aluminium is more reactive

  7. If carbon reduction extracts a metal from its oxide, is it more or less reactive than carbon?

    • More reactive
    • Equally reactive
    • Unreactive like gold
    • Less reactive

  8. What does reduction involve in terms of oxygen?

    • Loss of oxygen
    • Loss of carbon
    • Gain of water
    • Gain of oxygen

  9. How are most metals found in the Earth's crust?

    • As compounds
    • As dissolved gases
    • As pure elements
    • As pure liquids

  10. An oxide is reduced by carbon. Which species is reduced in this process?

    • The metal oxide
    • Carbon dioxide
    • Oxygen
    • Carbon

  11. Iron(III) oxide is heated with carbon: Fe2O3 + 3C -> 2Fe + 3CO. Which statement is correct?

    • No species changes
    • Iron is oxidised
    • Carbon is oxidised
    • Carbon is reduced

  12. What happens to carbon during the carbon reduction of a metal oxide?

    • It forms a salt
    • It is oxidised
    • It is reduced
    • It remains unchanged

  13. Which detail is excluded from GCSE specifications for metal extraction?

    • Industrial process details
    • Loss of oxygen
    • Reactivity of metals
    • Reduction with carbon

  14. CuO + C -> Cu + CO. What mass of copper forms from 79.5 g of CuO? (CuO = 79.5, Cu = 63.5)

    • 16 g
    • 143 g
    • 79.5 g
    • 63.5 g

  15. Which gas is produced when metal oxides are reduced using carbon?

    • Carbon dioxide
    • Hydrogen
    • Oxygen
    • Chlorine

  16. Which metal is most likely to be found as a native element rather than in a compound?

    • Potassium
    • Sodium
    • Platinum
    • Calcium

  17. Which metal cannot be extracted from its oxide by reduction with carbon?

    • Zinc
    • Magnesium
    • Iron
    • Copper

  18. Which process removes oxygen from a metal oxide?

    • Filtration
    • Reduction
    • Dissolution
    • Oxidation

  19. Which type of chemical reaction is used to extract metals less reactive than carbon?

    • Oxidation with carbon
    • Reduction with carbon
    • Electrolysis only
    • Thermal decomposition alone

  20. What happens to a metal oxide during reduction with carbon?

    • It loses electrons
    • It gains mass
    • It gains oxygen
    • It loses oxygen

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