Give —

(a) the principle involved in separation of the mixture

(b) the technique of separation

for pure water from impure water.

(a) Principle involved: Based on the distillation of the liquid component in a soluble solid-liquid mixture.

(b) Technique of separation: The soluble impurity can be separated from its liquid component or pure water from impure water by placing the mixture, i.e., impure water in the distillation flask. On heating the distillation flask, the solid or solid impurities in water remains behind in the distillation flask. The liquid or water vaporizes, condenses in the Leibig's condenser and is collected in the receiver.