Which one of the following is an example of disproportionation reaction? 42– + 4– 2 2 4– + – 2 2 – 4– + 2+ 2 2 4– 2 32– 2 2 42– – (A) 3MnO + 4H → 2MnO + MnO + 2H O (B) MnO + 4H + 4e → MnO + 2H O 10I +

Question

Which one of the following is an example of disproportionation reaction? 42– + 4– 2 2 4– + – 2 2 – 4– + 2+ 2 2 4– 2 32– 2 2 42– –

(A) 3MnO + 4H  → 2MnO + MnO  + 2H O
(B) MnO + 4H  + 4e  → MnO  + 2H O 10I  + 2MnO
(C) + 16H  → 2Mn + 8H O + 5I 8MnO
(D) + 3S O + H O → 8MnO  + 6SO + 2OH

Prashant Kotian · Accepted Answer

Correct answer: A) 3MNO + 4H  → 2MNO + MNO  + 2H O. Oxidation state of Mn is increasing from +6 to +7 and decreasing from +6 to +4 Hence, it is a disproportionation reaction

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