O-LevelChemistryMetals & Reactivity5070/12 · May/June 2023 · Q311 Mark

Pieces of magnesium can be attached to the steel hull of a ship to prevent rusting. This is sacrificial protection. Which statements about sacrificial protection are correct? 1 Iron atoms gain electrons and form hydrated iron(III) oxide. 2 Magnesium atoms gain electrons to form magnesium ions. 3 Magnesium is oxidised.

A1 and 2

B1 and 3

C2 and 3

D3 only

✓ Correct answer

D: 3 only

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Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 31.

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