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Question: Answered & Verified by Expert
The product obtained at anode when $50 \%$ $\mathrm{H}_2 \mathrm{SO}_4$ aqueous solution is electrolysed using platinum electrodes is :
Chemistryp Block Elements (Group 15, 16, 17 & 18)AP EAMCETAP EAMCET 2003
Options:
  • A $\mathrm{H}_2 \mathrm{SO}_3$
  • B $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$
  • C $\mathrm{O}_2$
  • D $\mathrm{H}_2$
Solution:
1939 Upvotes Verified Answer
The correct answer is: $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$
$50 \% \mathrm{H}_2 \mathrm{SO}_4$ aqueous solution can be electrolysed by using Pt electrodes as $2 \mathrm{H}_2 \mathrm{SO}_4 2 \mathrm{HSO}_4^{-}+2 \mathrm{H}^{+}$
$2 \mathrm{HSO}_4^{-} \longrightarrow \mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8+2 e^{-}$(at anode)

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