Question:
Which of the following reactions are disproportionation reactions?
(a) Cu+ → Cu2+ + Cu
(b) 3MnO4– + 4H+ → 2MnO4– + MnO2 + 2H2O
(c) 2KMnO4 → K2MnO4 + MnO2 + O2
(d) 2MnO4– + 3Mn2+ + 2H2O → 5MnO2 + 4H+
(i) a, b
(ii) a, b, c
(iii) b, c, d
(iv) a, d
Solution:
Option (i) (i) a, b is the answer.