Question

 State the principle of refining of metal by the following methods :
(a) Zone refining
(b) Electrolytic refining
(c) Vapour phase refining

Answer 1

[Hint :(a) The impurities are more soluble in the melt than in the solid state of the metal.

(b) Impure metal is made to act as anode, while the strip of same metal in pure form as cathode.]