O-LevelChemistryMetals & Reactivity5070/11 · Oct/Nov 2023 · Q281 Mark

Which statement about corrosion of metals is correct?

Abarrier method is needed to prevent the corrosion of stainless steel.

BIron corrodes to produce hydrated iron(I) oxide.

CSacrificial protection uses a less reactive metal attached to the metal object that is being protected.

DWhen corrosion occurs, the metal loses electrons to become positive ions.

✓ Correct answer

D: When corrosion occurs, the metal loses electrons to become positive ions.

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Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2023 Paper 1 Variant 1, question 28.

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