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Question

When an aqueous solution of sodium sulphate is electrolysed, on cathode we get: 



A

Na

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B

H2

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C

SO2

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D

SO3

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Solution

The correct option is C

H2


During electrolysis of aqueous sodium sulphate, water gets reduced at the cathode liberating hydrogen gas and oxygen gets liberated at the anode due to oxidation.
At cathode:
2H2O + 2eH2 + 2OHAt anode:
2H2O  O2 + 4H+ +4e
 


Chemistry

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