The metal purified by Mond process is $\underline{X}$ and metal purified by van Arkel method is $\underline{Y}$. $X$ and $Y$ respectively are

The metal for which its property of formation of a volatile complex is taken into account for its extraction 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 purification of Zirconium and Titanium metals.

Identify the appropriate electrodes for the electrolytic refining of a copper sample containing zinc as an impurity.

The zone refining method is based on which principle?