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Question

Which of the below given options are correct for the electrolysis of aqueous copper sulphate solution with platinum electrode?



A

Copper is oxidized.

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B

oxygen is evolved at cathode

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C

Platinum is deposited

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D

oxygen is evolved at anode

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Solution

The correct option is D

oxygen is evolved at anode


The ions present in the solution are Cu2+,H+,SO42 and OH, during the electrolysis of aqueous copper sulphate solution with platinum  electrode,below are the reactions happening at cathode and anode.

At Cathode:Cu2++2e Cu

At anode:OH OH+e

                4OH 2H2O+O2

Here the oxygen is evolved at anode.


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