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Chemistry · May / June 2025 · Paper 12 · Question 27

5070Reactivity series

Which statement explains why objects manufactured from aluminium corrode very slowly?

  1. AAluminium is above hydrogen in the reactivity series.
  2. BAluminium is below hydrogen in the reactivity series.
  3. CThe objects become coated with a protective layer of aluminium nitride.
  4. DThe objects become coated with a protective layer of aluminium oxide.

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Correct answer: D. The objects become coated with a protective layer of aluminium oxide.

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