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Question: Answered & Verified by Expert
In electrolysis of aqueous copper sulphate, the gas at anode and cathode is
ChemistryElectrochemistryJEE Main
Options:
  • A $\mathrm{O}_2$ and $\mathrm{H}_2$
  • B $\mathrm{SO}_2$ and $\mathrm{H}_2$
  • C $\mathrm{H}_2$ and $\mathrm{O}_2$
  • D $\mathrm{SO}_3$ and $\mathrm{O}_2$
Solution:
1559 Upvotes Verified Answer
The correct answer is: $\mathrm{O}_2$ and $\mathrm{H}_2$
Cathode: $2 \mathrm{H}_2 \mathrm{O}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_2+2 \mathrm{OH}^{-}$
Anode: $\mathrm{H}_2 \mathrm{O} \rightarrow 2 \mathrm{H}^{+}+\frac{1}{2} \mathrm{O}_2+2 \mathrm{e}^{-}$

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