Which of the following will not be oxidized by ozone?

K I

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F e S O_{4}

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K M n O_{4}

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K_{2} M n O_{4}

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Solution

The correct option is C $K M n O_{4}$
$K M n O_{4}$ cannot be further oxidized by $O_{3}$ . It has the highest +7 oxidation state of $M n$ in it.

Alkaline $K I$ is oxidised to potassium iodate and periodate.
$K I + 3 O_{3} \to K I O_{3} Pot. iodate + 3 O_{2}$

$K I + 4 O_{3} \to K I O_{4} Pot. periodate + 4 O_{2}$

It oxidises manganate to permanganate:
$2 K_{2} M n O_{4} + H_{2} O + O_{3} \to 2 K M n O_{4} + 2 K O H + O_{2}$

Acidified ferrous sulphate is oxidised to ferric sulphate
$2 F e S O_{4} + H_{2} S O_{4} + O_{3} \to F e_{2} (S O_{4})_{3} + H_{2} O + O_{2}$

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