Which of the following is not oxidised by $O_{3}$ ?

K I

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K M n O_{4}

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K_{2} M n O_{4}

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F e S O_{4}

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Solution

The correct option is B $K M n O_{4}$
Mn in $K M n O_{4}$ is in highest oxidation state can not be oxidised.

$I^{-}, M n O_{4}^{2 -}$ and $F e^{2 +}$ can be oxidised to $I_{2}, M n O_{4}^{-}$ and $F e^{3 +}$ respectively by $O_{3}$ .

Hence ,option B is correct.

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