Oxidation number of sulphur in H2SO5 is

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+ 2

+ 4

+ 8

+ 6

answer is D.

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Detailed Solution

+2+x-10=0 ; x=+8, it is not possible to have O.State of sulphur to be greater than +6.Thus the molecule has a peroxy bond. In peroxo bond, O.S of oxygen is -1.Thus two oxygens have -1 state and three oxygens have -2 state.2 × + 1 + x + 3 × -2 + 2 × -1 for H for S for O for O - O ⇒ 2 + x - 6 -2 = 0 ⇒ x = 6

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