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Which of the given reactions is not an example of disproportionation reaction? (A) 2H2O2 → 2H2O + O2

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Which of the given reactions is not an example of disproportionation reaction?

(A) 2H2O2 → 2H2O + O2

(B) 2NO2 + H2O → HNO3 + HNO2

(C) MnO4– + 4H+ + 3e– → MnO2 + 2H2O

(D) 3MnO42– + 4H+ → 2MnO4– + MnO2 + 2H2O

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Correct option is (C) MnO4– + 4H+ + 3e– → MnO2 + 2H2O

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