Which one of the following does not decolourize an acidified $K M n O_{4}$ solution.

SO₂

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FeCl₃

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H₂O₂

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FeSO₄

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Solution

The correct option is B
FeCl₃

$F e^{+ 3}$ ion cannot be further oxidized, so it cannot decolorize $K M n O_{4}$ solution

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