Which of the following is not correctly matched?

Which of the following elements is extracted using $I_2$ as the reactant?

In the electrolytic refining of metals,the electrolysis of an aqueous solution of its complex salt is performed using an impure metal as the anode and a strip of pure metal as the cathode. This method cannot be used for the refining of which of the following metals?

Match the elements in Column-$I$ with methods of purification in Column-$II$.

Column-$I$	Column-$II$
$(a)$ Boron	$(i)$ Van Arkel method
$(b)$ Tin	$(ii)$ Mond's process
$(c)$ Zirconium	$(iii)$ Liquation
$(d)$ Nickel	$(iv)$ Zone refining

The metal for which its property of formation of a volatile complex is taken into account for its extraction is:

Impure aluminium is purified by