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Reactivity with Halogens (Group 1)

Iodine oxidiz...

Question

Iodine oxidizes $S_{2} O_{3}^{2 -}$ ion to:

S O_{3}^{2 -}

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S O_{4}^{2 -}

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S_{4} O_{6}^{2 -}

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S^{2 -}

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Solution

The correct option is C $S_{4} O_{6}^{2 -}$
The complete reaction that oxidises $S_{2} O_{3}^{2 -}$ by using Iodine is
$2 S_{2} O_{3}^{- 2} + I_{2} ⟶ S_{4} O_{6}^{- 2} + 2 N a I$
$(+ 2)$ $(+ 2.5)$
As the oxidation number of sulphur increases, so it is oxidised.
Ans :- Option C.

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