In which of the following reaction, H2O2 acts neither as an oxidizer nor as a reducer?
A
MnO−4+H++H2O3→
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B
PbS+H2O2→
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C
Na2CO3+H2O2→
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D
SO2+H2O2→
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Solution
The correct option is DNa2CO3+H2O2→ Hydrogen peroxide reacts with Na2CO3 in an acid-base reaction as follows:
Na2CO3+H2O2→Na2O2+H2O+CO2. On reaction with H2O2, MnO−4 is reduced in acidic medium to give Mn2+ salt, PbS is oxidized to PbSO4 and SO4 is oxidized to H2SO4.