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

S O_{2}

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F e C l_{3}

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H_{2} O_{2}

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F e S O_{4}

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Solution

The correct option is B $F e C l_{3}$
$F e^{+ 3}$ ion cannot be further oxidized, so it cannot decolorize KMnO4 solution

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