Question

Which of the following reactions are disproportionation reaction ?
A. `2Cu^(+)toCu^(2+)+Cu^(0)`
B. `3KMnO_(4)^(2-)4H^(+)to2MnO_(4)^(-)+MnO_(2)+2H_(2)O`
C. `2KMnO_(4)overset(triangle)toK_(2)MnO_(4)+MnO_(2)+O_(2)`
D. `2MnO_(4)^(-)+3Mn^(2+)+2H_(2)Oto5MnO_(2)+4H^(+)`

Answer 1

Correct Answer - B
Disproportionation reaction: The reaction in which same element/compound get oxidized and reduced simultaneously.
(a). `2Cu^(+)toCu^(2+)+Cu^(0)`
(b). `3MnO_(4)^(2-)4H^(+)to2MnO_(4)^(-)+MnO_(2)+2H_(2)O`
(d). Option belongs to comproportionation reactioin.