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(i) Define corrosion . (ii) What is co...

(i) Define corrosion .
(ii) What is corrosion of iron called?
(iii) How will you recognise the corrosion of silver?
(iv) Why corrosion of iron is a serious problem ?

Text Solution

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(i) Corrosion is a process in which metals are deteriorated by action of air, moisture, chemicals, etc.
(ii) Corrosion of iron is called Rusting.
(iii) Silver turns black as it reacts with `H_(2)S` present in air and forms a layer of `Ag_(2)S`.
(iv) Corrosion of iron is a serious problem beause it leads to wastage of tonnes of iron every year and lot of money is spent to repair or replace it .
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