Define.

(a) Melting point

(b) Boiling point

(c) Distillation.

(a) Melting Point:- The temperature at which the state of a substance changes from solid to liquid is called a melting point of the substance.

For example:- The melting point of ice is 0℃ while that of iron is 1535°C.

(b) Boiling Point:- The temperature at which the liquid boils is called the boiling point of the substance.

For example:- The boiling point of water is 100℃ and that of iron is 2750°C.

(c) Distillation:- It is a process in which a liquid is first heated up to its boiling point and then, it's vapor is cooled to obtain the liquid again.