In the liquation process used for tin $(Sn)$,the metal

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?

Bessemer converter is used in the refining of

If a metal has low oxygen affinity,then the purification of the metal may be carried out by:

Blister copper is refined by stirring molten impure metal with green logs of wood because such wood liberates hydrocarbon gases (like $CH_4$). This process $X$ is called . . . . . . . . . and the metal contains impurities of $Y$ is . . . . . . . . .

The Van-Arkel method of refining $Zr$ involves,