Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium? 2 2 3 + – 2 2 2 4 2 4– 2 2 2 2 2 – 2+ 2 2 4+ – 4– 2 +2 (A) HOCl + H O H O + Cl + O PbS + 4H O

Question

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium? 2 2 3 + – 2 2 2 4 2 4– 2 2 2 2 2 – 2+ 2 2 4+ – 4– 2 +2

(A) HOCl + H O H O  + Cl  + O PbS + 4H O
(B) PbSO  + 4H O 2MnO + 3H O
(C) 2MnO  + 3O  + 2H O + 2OH Mn + H O
(D) Mn + 2OH

Prashant Kotian · Accepted Answer

Correct answer: C) 2MNO  + 3O  + 2H O + 2OH MN + H O. In basic medium, MnO ion is reduced to MnO , whereas in acidic medium it is reduced to Mn .

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