SO2 readily decolourises acidified KMnO4.
KMn+7O4+S+4O2→ColourlessMnSO4+H2SO4+K2SO4
Potassium permagnate gives the colouless solution with sulphurdioxide.
NEET UG 2017 — Chemistry Inorganic Chemistry
Name the gas that can readily decolourise acidified KMnO4 solution.
Held on 30 Apr 2017 · Verified 9 Jul 2026.
CO2
SO2
NO2
P2O5
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