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How many of the following is not oxidise...

How many of the following is not oxidised by `O_(3) ? KI, FeSO_(4), KMnO_(4), K_(2)MnO_(4)`

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The correct Answer is:
1
Ozone does nto oxidizes `KMnO_(4)`. But it oxidizes `K_(2)MnO_(4)`.
`2KI+H_(2)O+O_(3) to 2KOH+I_(2)+O_(2). 2FeSO_(4)+H_(2)SO_(3) +O_(3) to Fe(SO_(4))_(3)+H_(2)O+O_(2)`
`2K_(2)MnO_(4)+H_(2)O+O_(3) to 2KMnO_(4)+2KOH+O_(2), KMnO_(4)+O_(3) to` no reaction.
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