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Question: Answered & Verified by Expert
Name the gas that can readily decolourise acidified KMnO4 solution
Chemistryd and f Block ElementsNEET
Options:
  • A SO2
  • B NO2
  • C P2O5
  • D CO2
Solution:
2609 Upvotes Verified Answer
The correct answer is: SO2
SO2 being a reducing agent can reduce and decolourise KMnO4 into Mn2+ as follows
2KMnO4Purple/Violet+5SO2+2H2OK2SO4+2MnSO4Colourless+2H2SO4

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