Question

How to prevent rusting of iron?
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Answer 1

Answer:

we can prevent rust by applying oil or paint coat over the surface. or we can use the process of galvanization .

Answer 2

when iron object are exposed to air and moisture (humid air),they are covered with a brown powdery layer called rust. the formation of rust on the surface of iron is called rusting of iron.

$iron \: objects \: \frac{air}{moisture} = \: rust$

here, the composition and properties of rust are different from those of iron. rust cannot be converted back into iron by simple physical method.