Outline the principles of refining of metals by the following methods

1.	Outline the principles of refining of metals by the following methods : (i) Zone refining. (ii) Electrolytic refining. (iii) Vapour phase refining
Answer» (i) Zone refining:The impurities are more soluble in the molten sate then in the solid state of the metal. (ii) Electrolytic refining: Tendency of pure metal to deposit on the cathode by passing electricity. (iii) Vapour phase refining: Impure metal forms volatile compound which easily decomposes to pure metal on further heating.

Outline the principles of refining of metals by the following methods : (i) Zone refining. (ii) Electrolytic refining. (iii) Vapour phase refining

Answer»

(i) Zone refining:The impurities are more soluble in the molten sate then in the solid state of the metal.

(ii) Electrolytic refining: Tendency of pure metal to deposit on the cathode by passing electricity.

(iii) Vapour phase refining: Impure metal forms volatile compound which easily decomposes to pure metal on further heating.