In mildly alkaline medium, thiosulphate ion is oxidized by

Question:

In mildly alkaline medium, thiosulphate ion is oxidized by $\mathrm{MnO}_{4}^{-}$to "A". The oxidation state of sulphur in "A" is

Solution:

(6)

$\mathrm{S}_{2} \mathrm{O}_{3}^{2-}+\mathrm{MnO}_{4}^{-} \frac{\text { Alkaliue }}{\text { Melium }} \mathrm{A}$

$A \rightarrow S O_{4}^{-2}$

$\therefore$ Oxidation no. of 'S' $=+6$ Ans.

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