Differentiate between simple distillation and fractional distillation.

Explanation

(a) In fractional distillation, a fractionating column is used while no such column is needed in simple distillation.
(b) Simple distillation can be used to separate two miscible liquids differing in their boiling points by more than `25^(@)C`. In case, the difference is less than this, fractional distillation is used.