Question

What are the conditions necessary required for rusting?

Answer 1

Rusting:

When an iron object is left in damp air (or water) for a considerable time, it gets covered with a red-brown flaky substance called rust.

Conditions Necessary For Rusting:

The two conditions necessary for the rusting of iron to take place are:

(I) Presence of oxygen (of air), and

(ii) Presence of water or water vapour (called moisture).