$(a)$ Define corrosion.
$(b)$ What is corrosion of iron called?
$(c)$ How will you recognise the corrosion of silver?

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(N/A) Corrosion: The process in which metals are eaten away gradually by the action of air,moisture,or a chemical on their surface.
$(b)$ The corrosion of iron is called rusting.
$(c)$ Corrosion of silver is recognised by the development of a black coating on the surface of the metal.

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