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An Intiative by Sri Chaitanya
a
The oxidation number of S in (NH4)2 S2O8 is +6.
b
The oxidation number of Os in OsO4 is +8.
c
The oxidation number of S in H2SO5 is +8.
d
The oxidation number of O in KO2 is -1/2.
answer is C.
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