Which one of the following is an example of disproportionation reaction? (JEE Main 2022)

Chemistry · JEE Main · NTA Exams — Redox Reactions and Electrochemistry

1. 3MnO₄^2– + 4H⁺ → 2MnO₄^– + MnO₂ + 2H₂O
2. MnO₄^– + 4H⁺ + 4e^– → MnO₂ + 2H₂O
3. 10I^– + 2MnO₄^– + 16H⁺ → 2Mn²⁺ + 8H₂O + 5I₂
4. 8MnO₄^– + 3S₂O₃^2– + H₂O → 8MnO₂ + 6SO₄^2– + 2OH^–

Answer

(A) 3MnO 4 2– + 4H + → 2MnO 4 – + MnO 2 + 2H 2 O

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