In electrorefining of metals,the anode and cathode are taken as a thick slab of impure metal and a strip of pure metal,respectively,while the electrolyte is a solution of a complex metal salt. This method cannot be applied for the refining of:

$A$ low boiling point metal contains a high boiling point metal as an impurity. The correct refining method is:

Given below are two statements.
Statement $I:$ During electrolytic refining,blister copper deposits precious metals.
Statement $II:$ In the process of obtaining pure copper by electrolysis method,blister copper is used to make the anode.
In the light of the above statements,choose the most appropriate answer from the options given below.

Explain the zone refining process or explain refining by fractional crystallization.

In the purification of impure nickel by Mond's process,metal is purified by

The zone refining method is used for the purification of which of the following?