Verified Solution • 2025–26 Session
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QNEET-2017-Ch-946: NEET 2017 Chemistry - Class 12 NEET-2017-Ch-946 Solution: Name the gas that can readily decolourise acidified \(KMnO_4\)…
Name the gas that can readily decolourise acidified solution.
Multiple Choice Options
- A SO 2
- B NO 2
- C P 2 O 5
- D CO 2
Step-by-Step Verified Solution
Acidified KMnO 4 is a strong oxidizing agent
thus, among the given option which readily
undergoes oxidation with KMnO 4 will decolourise
it. CO 2 , NO 2 and P 2 O 5 are already in their highest
oxidation state while SO 2 can further oxidize with
KMnO 4 to give sulphate ions.
2MnO 4 � + 5SO 2 + 2H 2 O _ 2Mn 2+ + 5SO 4 2� + 4H +