Essential Chemistry for IGCSE - Air And Water (Section 5 - No. 20)
Which statement correctly describes how zinc protects iron from rusting?
Zinc prevents oxygen from reaching the iron.
Zinc acts as a sacrificial metal, corroding first.
Zinc enhances the reactivity of iron.
Zinc provides a decorative coating.
Explanation
Zinc corrodes first, protecting the iron sacrificially.
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