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The number of moles of KMnO(4) that will...

The number of moles of `KMnO_(4)` that will be needed to react with one mole of `S_(2)O_(3)^(2-)` in alkaline medium as, `MnO_(4)^(-)+S_(2)O_(3)^(2-)rarr MnO_(2)+SO_(4)^(2-)` is
`(3)/(8)`
`(8)/(3)`
`(4)/(5)`
`(5)/(4)`

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