First slide
Types of redox reactions
Question

Which of the following reactions are disproportionation reactions?

(i) 2Cu+Cu2++Cu0

(ii) 3MnO42-+4H+2MnO4-+MnO2+2H2O

(iii) 2KMnO4ΔK2MnO4+MnO2+O2

(iv) 2MnO4-+3Mn2++2H2O5MnO2+4H+

Easy
Solution

Disproportionation reactions are those in which the same element gets oxidized and reduced simultaneously.

2Cu+Cu2++Cu0 3M+6nO42-+4H+2M+7nO4-+M+4nO2+2H2O

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