Which of the given reactions is not an example of disproportionation reaction? 2 2 2 2 2 2 3 2 + – 2 2 + 4– 2 2 2 (A) 2H O → 2H O + O 2NO + H O → HNO + HNO (B) MnO + 4H + 3e → MnO + 2H O 3MnO (C) + 4H

Question

Which of the given reactions is not an example of disproportionation reaction? 2 2 2 2 2 2 3 2 + – 2 2 + 4– 2 2 2

(A) 2H O  → 2H O + O 2NO  + H O → HNO  + HNO
(B) MnO  + 4H  + 3e  → MnO  + 2H O 3MnO
(C) + 4H  → 2MnO
(D) + MnO  + 2H O

Prashant Kotian · Accepted Answer

Correct answer: B) MNO  + 4H  + 3E  → MNO  + 2H O 3MNO. The above reaction involves the reduction of MnO to MnO Rest all given reactions are disproportionation reactions.

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