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Question

Which of the following will not be oxidised by O3?

A
KI
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B
FeSO4
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C
KMnO4
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D
K2MnO4
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Solution

The correct option is C KMnO4
Oxidation is removal of electrons or increase in oxidation state of species.
In case of KMnO4, Mn is in it's highest oxidation state, hence it can't be oxidized further.

Hence, option C is correct.

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