JEE Main 2022 Chemistry question

Which one of the following is an example of disproportionation reaction?

(1)Correct
(2)
(3)
(4)8MnO_{4}^{-} + 3S_{2}O_{3}^{2-} + H_{2}O \to 8MnO_{2} + 6SO_{4}^{2-} + 2OH^{-}

Answer: (1)

Solution

In reaction (A) manganese in (+6) is converted to (+7) and (+4): the same species is simultaneously

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Question ID VK-025231