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Why does the likelihood of rusting increase when the zinc coating in galvanisation is removed?

Answer and explanation

Correct answer: Iron comes into direct contact with air and moisture

In galvanisation, the zinc coating prevents iron from coming into direct contact with oxygen in air and moisture. When the coating is removed, iron is exposed and can be oxidised in the presence of oxygen and water, causing rusting. Therefore, option A is correct. Option B is incorrect because a removed zinc coating does not reform on its own.

Related tags

Class 10 ScienceChemical ReactionsGalvanisationRustingCorrosionOxidation

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