Nitric oxide acts as a reducing agent in which of the following reaction ?

Options

A. `4NH_(2) + 5O_(2) to 2NO + 6H_(2)O`
B. `2NO + 3I_(2) + 4H_(2)O to 2NO_(3)^(-) + 6I^(-) + 8H^(+)`
C. `2NO + H_(2)SO_(3) to N_(2)O + H_(2)SO_(4)`
D. `2NO + H_(2)S to N_(2)O + S + H_(2)O`

Answer

B

Explanation

`2 overset(+2) (NO) + 3I_(2) + 4H_(2)O to 2 overset(+5)(N)O_(3)^(-) + 6I^(-) + 8H^(+)`
Hence, no acts as a reducing agent and reduces `I_(2)` to `I^(-)` since, the oxidation number of nitrogen changes from `+2` in `NO^(-)` to `+5` in `NO_(3)^(-)`