Question

explain how,painting of iron gate prevents it from rusting?

Answer 1

Painting of an iron gate prevents it from rusting because it cut the direct contact of iron from the environment and therefore there is no further exposure of iron to oxygen in moisture which is the causes for rusting.

Answer 2

Hello Friend
Here is your answer---
It is known that for rusting the presence of oxygen and moisture is essential. Painting prevents the iron gate from coming in contact with oxygen and moisture. Thus it prevents it from rusting.