Which metal is usefull for protection of iron by corrosion?

Aluminium

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Sodium

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Zinc

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Copper

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Solution

The correct option is C Zinc
A thin layer of zinc coats other metals such as iron. It protects the iron from corrosion. Also since zinc is a more reactive metal it acts as a sacrificial metal. The oxygen in the air reacts with zinc to form zinc oxide, thus protecting the iron.

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