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Uses of Metals

Direct curren...

Question

Direct current is passed through copper sulphate solution using platinum electrodes. The elements liberated at the electrodes are :

A

copper at anode and sulphur at cathode

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B

sulphur at anode and copper at cathode

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C

oxygen at anode and copper at cathode

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D

copper at anode and oxygen at cathode

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Solution

The correct option is D oxygen at anode and copper at cathode
Platinum are non reactive.
Therefore disulphide doesn't react with it . Hydroxide ions will get oxidise to give free oxygen at anode. At cathode copper will be deposited.

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