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Q.

Average oxidation number of sulphur in $S_{2} O_{3}^{2 -}$ is

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a

-2

b

+ 6

c

+ 2

d

0

answer is C.

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Detailed Solution

${\overset{*}{S}}_{2} O_{3}^{2 -}$

$2 x + 3 (- 2) = - 2; x = + 2$ .

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