In the zone-refining method,the molten zone:

Mercury is purified by:

The metal that can be purified economically by fractional distillation method is:

Explain the purification of metals in the vapour phase with an example.

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.

The element that can be refined by distillation is: