O-LevelChemistryMetals & Reactivity5070/12 · Oct/Nov 2023 · Q281 Mark

The rusting of iron can be prevented by coating the iron with another material. Which statement explains why coating with zinc is more effective than painting?

AIf the coating is damaged, zinc corrodes instead of iron.

BIron is above zinc in the reactivity series.

CZinc does not react with air or with water.

DZinc forms an unreactive alloy coating with iron.

✓ Correct answer

A: If the coating is damaged, zinc corrodes instead of iron.

Oracle Prep sorts past-paper questions by topic, so you can drill Metals & Reactivity and see which topics are most likely to come up next.

Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2023 Paper 1 Variant 2, question 28.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content