Which of the following reactions are disproportionation reactions?

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Solution

Q.
Which of the following reactions are disproportionation reactions

(A) ${Cu}^{+} \to {Cu}^{2 +} + Cu$

(B) $3 {MnO}_{4}^{2 -} + 4 H^{+} \to 2 {MnO}_{4}^{-} + {MnO}_{2} + 2 H_{2} O$

(C) $2 {KMnO}_{4} \to K_{2} {MnO}_{4} + {MnO}_{2} + O_{2}$

(D) $2 {MnO}_{4}^{-} + 3 {Mn}^{2 +} + 2 H_{2} O \to 5 {MnO}_{2} + 4 H^{+}$

Choose the correct answer from the options given below: [2024]

1 (A), (B)

2 (B), (C), (D)

3 (A), (B), (C)

4 (A), (D)

Ans.
(1)

In a disproportionation reaction an element in one oxidation state is simultaneously oxidised and reduced. (A) and (B) are disproportionation redox reactions.

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