Corrosion

(a) Define corrosion, what is the nature given to corrosion of iron ? (b) Name the colour of coating formed on silver and copper when exposed to air. (c ) List two damages caused by corrosion and suggest, how these can be prevented.

(a) Explain the term "corrosion" with an example. Wriite a chemical equation to show the peocess of correcsion of iron. (b) What special name is given to the corrosion of iron ? (c ) What type of chemical reaction is involved in the corrosion of iron ? (d) Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.

The formula of corrosive sublimate is