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Question

Explain the term "corrosion" with an example.Write a chemical equation to show the process of corrosion of iron.


Solution

Corrosion is the process in which metals are eaten up gradually by the action of air,moisture or a chemical (such as an acid) on their surface. Rusting of iron metal is the most common form of corrosion.

During the corrosion of iron, iron metal is oxidised by the oxygen of an air in the presence of water (moisture) to form hydrated iron oxide called rust.

$$4Fe+3O_2+2xH_2O \rightarrow 2Fe_2O_3.x H_2O$$

Chemistry

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