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What is the similarity between galvanisation and painting?

Answer and explanation

Correct answer: Both prevent rusting by protecting the iron surface from contact with air and moisture.

Rusting requires iron to come into contact with oxygen and moisture in air. In galvanisation, iron is coated with zinc, whereas in painting it is coated with paint. Both coatings act as barriers between the iron surface and air and moisture, thereby preventing rusting. Option B is incorrect because paint is not a coating of a reactive metal.

Related tags

ScienceClass10Chemical ReactionsRustingCorrosionGalvanisationPainting

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