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Chemistry Question on Chemical Reactions

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium?

A

HOCI+H2O2→H3O++CI–+O2HOCI + H_2O_2 → H_3O+ + CI^– + O_2

B

PbS+4H2O2→PbSO4+4H2OPbS + 4H_2O_2 → PbSO_4 + 4H_2O

C

2MnO4−,+3H2O2→2MnO2,+3O2,+2H2O+2OH−2MnO^-_4, +3H_2O_2 → 2MnO_2, +3O_2, +2H_2O + 2OH^-

D

MN2++H2O2→Mn4++2OH−MN^{2+} + H_2O_2 → Mn^{4+}+2OH^-

Answer

2MnO4−,+3H2O2→2MnO2,+3O2,+2H2O+2OH−2MnO^-_4, +3H_2O_2 → 2MnO_2, +3O_2, +2H_2O + 2OH^-

Explanation

Solution

In basic medium MnO4–MnO_4^– is reduced to MnO2MnO_2, whereas in acidic medium it is reduced to Mn+2Mn^{+2}.

So, the correct option is (C): 2MnO4−,+3H2O2→2MnO2,+3O2,+2H2O+2OH−2MnO^-_4, +3H_2O_2 → 2MnO_2, +3O_2, +2H_2O + 2OH^-