Which of the following oxo-acids of sulphur has more than one oxidation state of oxygen?
A
H2S2O3
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B
H2S2O4
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C
H2S2O6
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D
H2S2O8
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Solution
The correct option is CH2S2O8 Oxygen in H2S2O8 has more than one oxidation state, for peroxy linkage oxygen has -1 oxidation state. while other oxygen atoms have -2 oxidation state.