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Q.

In which of the following reactions, H2O2  acts as a reducing agent?

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a

PbO2(s)+H2O2(aq)→PbO(s)+H2O(1)+O2(g)

b

Na2SO3(aq)+H2O2(aq)→Na2SO4(aq)+H2O(l)

c

2KI(aq)+H2O2(aq)→2KOH(aq)+I2(s)

d

KNO2(aq)+H2O2(aq)→KNO3(aq)+H2O(l)

answer is A.

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Detailed Solution

PbO2→PbO    (change in O.S. is +4 to +2 hence reduction) Follow Q 19.
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