Question

When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes are
A. `{:("Cathode","Anode"),("Pure zinc","Pure copper"):}`
B. `{:("Cathode","Anode"),("Impure zinc","Pure copper"):}`
C. `{:("Cathode","Anode"),("Impure zinc","Impure sample"):}`
D. `{:("Cathode","Anode"),("Pure copper","Impure sample"):}`

Answer 1

Correct Answer - D
Impure sample is made of the anode and pure copper acts as the cathode.