Name a suitable technique of the components from a mixture of calcium sulphate and comphor.

Explanation

A mixture of `CaSO_4` and camphor can be separated by the following two methods :
(i) Camphor is sublimable while `CuSO_4` is not sublimable. Hence, the mixture can be sublimed to get camphor.
(ii) Camphor is soluble in organic solvents such as `"CC"I_4, CHCI_3`, etc., while `CaSO_4` is not soluble. Therefore, when the mixture is shaken with a solvent, camphor goes into the solution while `CaSO_4` remains as residue. It is filtered and evaporation of the filtrate gives camphor.