In which of the following reaction hydrogen peroxide acts as reducing agent?
Na2SO3+H2O2→Na2SO4+H2O
PbS+4H2O2→PbSO4+4H2O
Ag2O(moist)+H2O2→2Ag+H2O+O2
2KI+H2O2+H2SO4→K2SO4+I2+H2O2
A
PbS+4H2O2→PbSO4+4H2O
B
Na2SO3+H2O2→Na2SO4+H2O
C
Ag2O(moist)+H2O2→2Ag+H2O+O2
D
2KI+H2O2+H2SO4→K2SO4+I2+H2O2
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Solution
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In (C) option, it reduces Ag from +2 to 0. While in rest all it is acting as oxidising agent. (A) oxidises S from −2 to +6 (B) oxidises S from +4 to +6 (D) oxidises I from −1 to 0.
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