WAEC - Chemistry (2010 - No. 27)
Which of the following statements about the electrolysis of CuSO4(aq) using copper cathode and platinum anode is not correct?
Copper is deposited at the cathode
Oxygen is liberated at the anode
it is used for the purification of copper
The solution becomes acidic
Paliwanag
For purifying impure copper, the anode electrode is impure copper while the cathode electrode is pure copper, but for this question, two different electrodes were used, hence option C is the correct option to this question.