Question

Three test tubes are taken and labelled as $A,B$ and $C$. In test tube $A$ iron nail is dipped in water. In test tube $B$ iron nail is dipped in mixture of water and oil and in test tube $C$ iron is added with dry calcium chloride.
Name the test tube in which the iron nail will rust and why?

Answer 1

The iron nail will rust in test tube $A$ because it provides the condition required for rusting, both moisture as well as air is present in it.