When the sample of copper with zinc impurityn is to be purified by electrolysis, the appropriate electrode are .

Options

A. `{:("Cathode",,"Anode"),("Pure iron",,"Pure copper"):}`
B. `{:("Cathode",,"Anode"),("Impure sample",,"Pure copper"):}`
C. `{:("Cathode",,"Anode"),("Impure Iron",,"Impure sample"):}`
D. `{:("Cathode",,"Anode"),("Pure copper",,"Impure sample"):}`

Answer

D

Explanation

Pure copper is taken as cathode and impure copper is taken as anode in electrolytic refining.