Question

what happens if metals are exposed to air??

Answer 1

hey bro here is your answer....
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if metals are exposed to air than they come in contact with moisture that is present in the air and due to which a red coloured layer of rust is being formed.
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hope it helped you!!!

Answer 2

If metals are exposed to air they get corroded.

Corrosion can be prevented by greasing, oiling, and painting the surface of metal so that air cannot come in direct contact with its surface.

Hope it helps :-)