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Question: Answered & Verified by Expert
$\mathrm{KMnO}_4$ oxidises $\mathrm{C}_2 \mathrm{H}_2 \mathrm{O}_4$ to form $\mathrm{CO}_2$. In which of the following, the reaction will be faster?
Chemistryd and f Block ElementsTS EAMCETTS EAMCET 2020 (10 Sep Shift 1)
Options:
  • A Aq. HCl solution
  • B Aq. $\mathrm{NaOH}$ solution
  • C Aq. $\mathrm{NaCl}$ solution
  • D Aq. $\mathrm{NaHCO}_3$ solution
Solution:
2973 Upvotes Verified Answer
The correct answer is: Aq. HCl solution
The reaction will faster in aqueous $\mathrm{HCl}$ because chlorine ion present in $\mathrm{HCl}$ get oxidised into chlorine gas by $\mathrm{KMnO}_4$, so the amount of $\mathrm{KMnO}_4$ will be more as it oxidises both oxalic acid and chlorine ion when $\mathrm{HCl}$ is present.

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