Explain how, painting of an Iron gate prevents it from rusting.

(a) How does the painting of an iron object prevent its rusting? (b) How does the electrical conductivity of copper alloys, brass ad bronze, differ from that of pure copperr? (c) What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.

In which process is a protective zinc coating applied on iron to prevent it from rusting?

Metals can be prevented from rusting by .

Rusting of iron is

A man painted his main gate made up of iron , to (i) prevent it from rusting . (ii) Protect it from sun . (iii) make it look beautiful . (iv) make it dust free . Which of the above statement (s) is are correct ?