Chemistry - Complete d-block Question with Solution | TestHub

In the electrolytic refining of zinc, anode is made up of impure zinc while a strip of pure zinc acts as cathode. An acidified solution of zinc sulphate acts as electrolyte. When electricity is passed, following reactions occur.

At cathode
${\text{ Zn}}^{\text{2+}}{\text{+2e}}^{-}\to \underset{\text{(pure)}}{\text{Zn}}$

At anode
$\underset{\text{(impure)}}{\text{Zn}}\to {\text{ Zn}}^{\text{2+}}\text{+}{\text{2e}}^{-}$