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Question
Write the observation, and balanced equation for the following reaction:
A paper dipped in potassium permanganate solution is placed at the mouth of a test tube, containing sulphur dioxide gas.
Solution
Pink colour of KMnO4 is discharged.
\[\ce{2KMnO4 + 3H2SO4 -> K2SO4 + 2MnSO4 + 5O + 3H2O}{\text{...(1)}}\]
\[\ce{SO2 + H2O + O -> H2SO4 x 5}{\text{...(2)}}\]
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\[\ce{2KMnO4 + 5SO2 + 2H2O -> K2SO4 + 2MnSO4 + 2H2SO4}\]
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