Chemistry · Oct / Nov 2023 · Paper 12 · Question 28
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.
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Correct answer: A. If the coating is damaged, zinc corrodes instead of iron.
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