In which of the following reaction, H2O2 is acting as a reducing agent
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a
H2O2+SO2→H2SO4
b
2KI+H2O2→2KOH+I2
c
PbS+4H2O2→PbSO4+4H2O
d
Ag2O+H2O2→2Ag+H2O+O2
answer is D.
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Detailed Solution
SO2 changes to H2SO4 (O.N. changes from +4 to +6 oxidation) 2HI→I2 (O.S. changes from -1 to 0 oxidation)PbS→PbSO4 (O.S. changes from -2 to +6 oxidation)Ag2O→2Ag (O.S. changes from +1 to 0 reduction)