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When CuSO4 is electrolysed using platinum electrodes,

1. Copper is liberated at cathode, sulphur at anode
2. Copper is liberated at cathode, oxygen at anode
3. Sulphur is liberated at cathode, oxygen at anode
4. Oxygen is liberated at cathode, copper at anode

Correct answer: Copper is liberated at cathode, oxygen at anode

Solution

During the electrolysis of CuSO4 with platinum electrodes, Cu²⁺ ions are reduced to copper at the cathode, and water is oxidized to release oxygen gas at the anode.

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