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Question: Answered & Verified by Expert
Chlorine is used to purify drinking water. Excess of chlorine is harmful. The excess of chlorine is removed by treating with sulphur dioxide. Present a balanced equation for this redox change taking place in water.
ChemistryRedox ReactionsNEET
Options:
  • A $\mathrm{Cl}_2(g)+\mathrm{SO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HCl}(a q)+\mathrm{H}_2 \mathrm{SO}_4(a q)$
  • B $\mathrm{Cl}_2(g)+2 \mathrm{SO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HCl}(a q)+\mathrm{H}_2 \mathrm{SO}_4(a q)$
  • C $\mathrm{Cl}_2(g)+\mathrm{SO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HCl}(a q)+\mathrm{H}_2 \mathrm{SO}_3(a q)$
  • D $\mathrm{Cl}_2(g)+2 \mathrm{SO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HCl}(a q)+\mathrm{H}_2 \mathrm{SO}_3(a q)$
Solution:
2026 Upvotes Verified Answer
The correct answer is: $\mathrm{Cl}_2(g)+\mathrm{SO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HCl}(a q)+\mathrm{H}_2 \mathrm{SO}_4(a q)$
Correct Option is : (A)
$\mathrm{Cl}_2(g)+\mathrm{SO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \rightarrow 2 \mathrm{HCl}(a q)+\mathrm{H}_2 \mathrm{SO}_4(a q)$

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