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

Which process of purification is represented by the following scheme?
$\text{Ti}_{\text{impure}} + 2I_2$ $\xrightarrow{250^{\circ}C} TiI_4$ $\xrightarrow{1400^{\circ}C} \text{Ti}_{\text{pure}} + 2I_2$

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

Explain chromatographic methods to refine the elements.

Refining using the liquation method is the most suitable for metals with:

Match the List-$I$ and List-$II$.

List-$I$	List-$II$
$A$. Van Arkel method	$P$. Purification of titanium
$B$. Solvay process	$Q$. Manufacture of $Na_2CO_3$
$C$. Bessemerisation	$R$. Reduction of copper
$D$. Hall-$H$éroult process	$S$. Extraction of aluminium