Essential Chemistry for IGCSE - Air And Water (Section 6 - No. 12)
Why is zinc considered a sacrificial metal in the context of rust prevention?
Because it is more resistant to corrosion than iron.
Because it corrodes in preference to the iron.
Because it forms a protective layer on the iron.
Because it slows down the rate of rusting in iron.
Explanation
Zinc corrodes preferentially, protecting the iron.
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