Mercury is purified by:

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.

Metal $X$ obtained from sphalerite ore can be purified by which of the following methods?

Zone refining is a technique used primarily for which one of the following processes?

In the Hoope's process for refining of aluminium,the fused materials form three different layers and they remain separated during electrolysis. This is because:

Identify the process of refining to obtain pig tin.