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  4. In mildly alkaline medium, thiosulphate ion is oxidized by MnO4- to A . The oxidation state of sulphur in A is.

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Q. In mildly alkaline medium, thiosulphate ion is oxidized by $MnO_{4}^{-}$ to $A$ . The oxidation state of sulphur in $A$ is________.

NTA AbhyasNTA Abhyas 2022

Solution:

$S_{2}O_{3}^{2 -}+MnO_{4}^{-} \rightarrow _{}^{Alkaline Medium}SO_{4}^{2 -}+MnO_{2}$
$A \rightarrow SO_{4}^{- 2}$
$\therefore $ Oxidation no. of $'S'=+6$ Ans.