Question

Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is (are) :

• A. Impure $Cu$ strip is used as cathode
• B. Acidified aqueous $CuSO_4$ is used as electrolyte
• C. Pure $Cu$ deposits at cathode
• D. Impurities settle as anode mud

Answer 1

Answer: (D)

Impurities settle as anode mud

Answer 2

(i) Due to acidified aqueous $CuSO_4$, conduction is increased
(ii) Cathode is made by pure Cu
(iii) Anode is made by Impure Cu
(iv) Ag and Au are settle down as a anode mud