In which of the following processess is nitrogen oxidised ?

Options

A. `NH_(4)^(o+)rarrN_(2)`
B. `NO_(3)^(ө)rarrNO`
C. `NO_(2)rarrNO_(2)^(ө)`
D. `NO_(3)^(ө)rarrNH_(4)^(ө)`

Answer

A

Explanation

`NH_(4)^(o+)rarrN_(2)`
Oxidation state of `N = -3` Oxidation state of `N=0`
In the other reaction, the oxidation state of `N` decreases.