Lesson 4.10.3.1

4.10.3.1 Corrosion and its prevention Quiz: AQA Chemistry, Unit 10

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.10.3.1, Corrosion and its prevention: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 10: Using resources, written with Revision Ninja.

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The 20 questions

  1. What term describes the destruction of materials by chemical reactions with the environment?

    • Reduction
    • Corrosion
    • Electroplating
    • Galvanising

  2. Which everyday example of corrosion is given?

    • Crystallisation
    • Distillation
    • Filtration
    • Rusting

  3. Which two environmental substances are both necessary for iron to rust?

    • Nitrogen and oil
    • Air and water
    • Carbon and heat
    • Hydrogen and salt

  4. What protects aluminium from further corrosion?

    • A layer of gold
    • A layer of sugar
    • An oxide coating
    • Plastic wrapping only

  5. Galvanising uses zinc to coat which metal?

    • Carbon
    • Gold
    • Iron
    • Sodium

  6. Which process forms a protective barrier coating on metal?

    • Smelting
    • Oxidation
    • Electroplating
    • Reduction

  7. What type of metal is used in sacrificial protection coatings?

    • Less reactive
    • Radioactive isotope
    • Unreactive noble
    • More reactive

  8. Why does zinc protect iron when a galvanised coating is scratched?

    • Zinc is a noble metal
    • Zinc is more reactive
    • Zinc forms an alloy
    • Zinc is less reactive

  9. Which two substances are both necessary for iron to rust?

    • Water and carbon
    • Air and nitrogen
    • Oxygen and argon
    • Air and water

  10. What is the main mechanism of greasing a bicycle chain to prevent rust?

    • Barrier coating
    • Reduction reaction
    • Sacrificial protection
    • Electroplating

  11. Why does aluminium resist corrosion despite being a reactive metal?

    • Protective oxide coating
    • Low electrical charge
    • Sacrificial zinc layer
    • Grease barrier layer

  12. Which metal would give sacrificial protection to iron?

    • Copper
    • Gold
    • Zinc
    • Silver

  13. Why does a copper coating fail as sacrificial protection on scratched iron?

    • Copper is more reactive
    • Copper reacts with water
    • Copper is less reactive
    • Copper is too soft

  14. Which conditions will successfully prevent an iron nail from rusting?

    • Dry air
    • Pure water
    • Damp air
    • Salt water

  15. What is the main purpose of electroplating a metal object?

    • Alloy formation
    • Thermal insulation
    • Sacrificial anode
    • Barrier coating

  16. Which coated iron object resists rusting best when scratched?

    • Tin-plated iron
    • Painted iron
    • Galvanised iron
    • Greased iron

  17. A control for the rusting experiment would contain iron in which conditions?

    • Water only
    • Dry air only
    • Air and water
    • Salt water

  18. An iron object coated with tin is scratched. What happens at the scratch?

    • Tin forms an oxide
    • Iron corrodes faster
    • Tin corrodes faster
    • Iron remains protected

  19. Which pair are both barrier coatings?

    • Sodium and chlorine
    • Greasing and painting
    • Zinc and iron
    • Air and water

  20. A galvanised bucket has a scratch through its zinc layer. What occurs?

    • Zinc corrodes first
    • Neither metal corrodes
    • Iron corrodes first
    • Zinc remains untouched

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