Answer :

(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.


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