Copper is purified by electrolytic refining of bliter copper .The current stetement about this process is (are):
(i) impure `Cu`strip is used as cathode
(ii)acidified aqueous` CuSO_(4)` is used as electrolyte
(iii) pure `Cu` deposits at eathode
(iv) impurities settle as anode -mud

Options

A. impure Cu strip is used as cathode
B. acidified aqueous `CuSO_4` is used as electrolyte
C. pure Cu deposite at cathode
D. impurities settle as anode-mud

Answer

B, C, D

Explanation

Impure copper on heating with `Cu_2 S` give Cu. Pure metal metal is made cathode. So, statement (a) is incorrect and (b,c,d) are correct.