The process involved in the given digram is Distillation. Distillation, process involving the conversion of a liquid into vapour that is subsequently condensed back to liquid form. The above diagram is representing distillation of salt solution to get distilled water. A mixture of two or more components with different boiling points is separated by this process.

Distillation, process involving the conversion of a liquid into vapour that is subsequently condensed back to liquid form. The above diagram is representing distillation of salt solution to get distilled water. A mixture of two or more components with different boiling points is separated by this process. In this process, common salt solution is taken in round bottom flask. Water converts into water vapour by heating. This on passing through the condenser liquifies to form water. Therefore, A is solution of common salt in water and B is water vapour.