One of the following metals forms a volatile compound and this property is taken advantage of for its extraction. This metal is

Zone refining process is used for which of the following?

Match the refining methods (Column $I$) with metals (Column $II$).

Column $I$ (Refining methods)	Column $II$ (Metals)
$(I)$ Liquation	$(a)$ $Zr$
$(II)$ Zone refining	$(b)$ $Ni$
$(III)$ Mond process	$(c)$ $Sn$
$(IV)$ Van Arkel Method	$(d)$ $Ga$

Bessemer converter is used in the refining of

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:

Which of the following metals is extracted using the cupellation process?