Identify disproportionation reaction :

Options

A. `CH_(4)+2O_(2)toCO_(2)+2H_(2)O`
B. `CH_(4)+4Cl_(2)toC Cl_(4)+4HCl`
C. `2F_(2)+2OH^(-)to2F^(-)+OF_(2)+H_(2)O`
D. `2NO_(2)+2OH^(-)toNO_(2)^(-)+NO_(3)^(-)+H_(2)O`

Answer

D

Explanation

`2NO_(2)+2OH^(-)toNO_(2)^(-)+NO_(3)^(-)+H_(2)O` is a disproportion reaction because N is both oxidised as well as reduced.O.N increases from `+4` (in `NO_(2))` to +3 (in `NO_(2)^(-))`.