Answer :

(a) The corrosion of iron is called rusting.

(b) Air and Water are necessary for the rusting of iron.

(c) The process of depositing a thin layer of zinc on iron articles is called galvanization.

(d) Tiffin boxes are electroplated with tin but car bumpers are electroplated with chromium to protect them from rusting.

(e) The corrosion of copper produces a green coating of basic copper carbonate on its surface.

(f) Brass is an alloy of copper and zinc.

(g) Bronze is an alloy of copper and tin.

(h) The non-metal present in steel is tin.

(i) The alloy in which one of the metals is mercury is called an amalgam.

(j) The electrical conductivity and melting point of an alloy is less than that of pure metals.

(k) The rocky material found with ores is called gangue.

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