Ncert Exercises & Solutions

Which of the following reactions are disproportionation reactions?

$\left(\right. i \left.\right) C u^{+} \rightarrow C u^{2 +} + C u$
$\left(\right. i i \left.\right) 3 M n O_{4}^{-} + 4 H^{+} \rightarrow 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O$
$\left(\right. i i i \left.\right) 2 K M n O_{4} \rightarrow K_{2} M n O_{4} + M n O_{2} + O_{2}$
$\left(\right. i v \left.\right) 2 M n O_{4}^{-} + 3 M n^{2 +} + 2 H_{2} O \rightarrow 5 M n O_{2} + 4 H^{+}$

1. (i)

2. (i) , (ii) and (iii)

3. (ii) , (iii) and (iv)

4. (i) and (iv)

NEETprep Answer:

The reaction in which oxidation as well as reduction, occur upon same atom simultaneously is known as disproportionation reaction.

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