Which one of the following should be done to prevent a machine from rusting?

Painting the machine

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Washing the machine with water

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Cleaning the machine with a paper

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Clean it with hydrochloric acid

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Solution

The correct option is A Painting the machine
Iron rusts when it comes in contact with water or the moisture in the air. Paint prevents the water molecules from reaching the surface of the metal and acts as a barrier between the metal and the moisture in the environment and thus prevents rust.

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