Select the correct statement about the following reactions.
`NH_(4) + NO_(2)^(-) to N_(2) + 2H_(2)O`

Options

A. Oxidation number of N in `NH_(4)^(-)` changed from `-2` to `+2`
B. Oxidation number of N in `NH_(4)^(+)` changed from `-3` to 0 and that in `NO_(2)^(-)` changed from `+3` to 0
C. Oxidation number of N in `NH_(4)^(+)` changd from `+1` to 0 and than in `NO_(2)^(-)` changed from `-1` to 0
D. No change in oxidation number

Answer

B

Explanation