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Question

In which of the following reaction hydrogen peroxide acts as reducing agent?

A
PbS+4H2O2PbSO4+4H2O
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B
Na2SO3+H2O2Na2SO4+H2O
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C
Ag2O(moist)+H2O22Ag+H2O+O2
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D
2KI+H2O2+H2SO4K2SO4+I2+H2O2
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Solution

The correct option is C Ag2O(moist)+H2O22Ag+H2O+O2
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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