Is Matter Around Us Pure ? — Science STD 9 — Question

Distillation is a process employed to obtain pure liquid from its solution. It can be defined as the conversion of impure liquid into vapours by evaporation and then condensation of the vapours to get pure liquid. This method is generally used for the separation of components of a mixture containing two miscible liquids that boil without decomposition and their boiling points are quite different (more than 25 - 30°C).
For example: if you heat salt water the water in the solution will boil before the salt.