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Question

The order of increasing oxidation number ofS in S8,S2O−28,S2O−23,S4O−26 is given below :

A
S8<S2O28<S2O23<S4O26
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B
S2O28<S2O23<S4O26<S8
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C
S2O28<S8<S4O26<S2O23
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D
S8<S2O23<S4O26<S2O28
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Solution

The correct option is D S8<S2O23<S4O26<S2O28
In S8 oxidation number of sulphur will be O in S2O28 oxidation number of sulphur will be
2x16=2
2x14x=7 (which is not possible) sulphur 6 which is mix oxidation number of oxidation state will be + 6.
In S2O23
2x6=2
x=+2
In S4O62
4x12=2
x=2.5
S8<S2O23<S4O26<S2O28
So the order of increasing oxidation number of S is S8<S2O23<S4O26<S2O28
Hence option D is correct.

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