(i) The impurities are evaporated from volatile metals to obtain the pure metal as distillate.
(ii) This method is based on the on the principle that the impurities ate more soluble in the molten state than in the solid state of the metal.
(iii) The impure metal is made to act as anode.A strip of the same metal in pure form is used as cathode. They are put in a suitable electrolytic bath containing soluble salt of the same metal.
The more basic metal remains in the solution and the less basic ones go to the anode mud.
