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A dilute aqueous solution of CuSo4 is el...

A dilute aqueous solution of `CuSo_4` is electrolysed using platinum electrods. The products at the anode and cathode are:

A

Copper is liberated at cathode, sulphur at anode

B

Copper is liberated at cathode, oxygen at anode

C

Sulphur is liberated at cathode, oxygen at anode

D

Oxygen is liberated at cathode, copper at anode.

Text Solution

Verified by Experts

The correct Answer is:
B
During electrolyses, copper is deposited at the cathode while oxygen is liberated at anode. The following reactions occur at the electrodes.
At anode `2H_(2)O to 4H^(+) + O_(2) + 4e^(-)`(Oxidation)
At cathode `Cu^(2+) + 2e^(-) to Cu(s)` (Reduction)
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