A mixture of camphor and CaSO4 can be separated as:
(a) Camphor is sublimable but CaSO4 is not, therefore, sublimation of the mixture gives camphor on the sides of the funnel while CaSO4 is left in the china dish.
(b) Camphor is soluble in organic solvents like CHCl3, CCl4 etc. while CaSO4 is not. Therefore, when the mixture is shaken with the solvent, camphor goes into the solution while CaSO4 *** as residue. It is filtered and evaporation of the solvent gives camphor.
