JEE MAIN - Chemistry (2025 - 22nd January Morning Shift - No. 1)
Which of the following electrolyte can be used to obtain $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$ by the process of electrolysis ?
Concentrated solution of sulphuric acid
Dilute solution of sodium sulphate.
Acidified dilute solution of sodium sulphate.
Dilute solution of sulphuric acid
Explanation
$\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$ is obtained by electrolysis of concentrated solution of sulphuric acid.
At anode :
$$ 2 \mathrm{HSO}_4^{-} \rightarrow \mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8+2 \mathrm{e}^{-} $$
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