Which of the following reactions of KMnO$_4$ occurs in acidic medium?
Show Hint
- Oxidation of thiosulphate to sulphate
- Precipitation of sulphur from H$_2$S
- Oxidation of iodide to iodate
- Oxidation of manganous salt to MnO$_2$
The Correct Option is B
Solution and Explanation
Potassium Permanganate Reaction in Acidic Medium
In acidic medium, \( \text{KMnO}_4 \) acts as an oxidizing agent. The reaction of \( \text{KMnO}_4 \) with \( \text{H}_2\text{S} \) leads to the precipitation of sulphur. This reaction occurs in acidic medium, where \( \text{KMnO}_4 \) oxidizes \( \text{H}_2\text{S} \) to sulphur. The other reactions do not occur in acidic medium or are not typical reactions for \( \text{KMnO}_4 \).
Conclusion:
Therefore, the correct answer is Precipitation of sulphur from \( \text{H}_2\text{S} \).
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