Question

what is meant by rusting of iron?

Answer 1

Rusting of iron means the oxidation of iron 
oxidation of iron is the process of iron getting converted into iron oxide (rust) 
4Fe+302=2Fe203 
in the presence of moisture (the oxygen comes from the moisture) 
basically rusting is just when iron becomes rust :P 
in case you didn't know rust is that reddish-brown powdery like substance chipping off from the iron railings of your house when left exposed 
all metals except gold and platinum 'rust' but it is generally called corrosion

Answer 2

Answer: Rusting is a slow process of oxidation of iron in the presence of air and maisture to from reddish brown hydrated iron third (oxide)

on the surface of iron. 4Fe+302+2xH20_2Fe2O3,xH2O.

Explanation: