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The p-Block Elements
Question
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In which of the following compounds, sulphur show maximum oxidation number?

  • H2SO4

  • SO3

  • H2S2O7

  • All have same oxidation number for sulphur

Answer

D.

All have same oxidation number for sulphur

All have same oxidation number for sulphate i.e + 6

(i) oxidation number of S is 

H2SO4 = +2 +x -8 = 0

Therefore, x = +6

(ii) Oxidation number of S is SO3 = x - 6 = 0
Therefore, x = 6

(iii) Oxidation number of S  in H2S2O7

 = 2 + 2x - 14 = 0
2x = + 12
x = +6

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