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How does applying oil to iron reduce rusting?

Answer and explanation

Correct answer: The oil layer prevents iron from contacting air and moisture.

Rusting requires iron to be in contact with oxygen and water/moisture. A layer of oil forms a protective barrier on the iron surface and prevents air and moisture from reaching it, so rusting is reduced. In contrast, option B suggests increasing reaction with water, which would not reduce rusting.

Related tags

ScienceClass 10Chemical ReactionsRustingCorrosionPrevention

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