When the sampleofcopperwith zinc impurity is to be purified by electrolysis, the appropriate electrodes are

Options

A. `{:("Cathode","Anode"),("pure zine","pure copper"):}`
B. `{:("Cathode","Anode"),("impure sample","pure copper"):}`
C. `{:("Cathode","Anode"),("impure zine","impure sample"):}`
D. `{:("Cathode","Anode"),("pure copper","impure sample"):}`

Answer

D

Explanation

Pure metal always deposits at cathode.