Which of the options can be $^{'} X^{'}$ in the following reaction?
$M n O_{4}^{-} + H^{+} + X ⟶ No reaction$

S_{2} O_{3}^{2 -}

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S O_{2}

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S O_{4}^{2 -}

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S O_{3}^{- 2}

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Solution

The correct option is C $S O_{4}^{2 -}$
$M n O_{4}^{-}$ is an odixiding agent in an acidic medium.
$S O_{4}^{2 -}$ cannot be oxidised because $S$ is in its highest oxidation state i.e. + 6.

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