Answer:
[tex]\huge\boxed{\textbf{Reduction}}[/tex]
Explanation:
Reduction:
- decrease in oxidation state.
Oxidation:
- increase in oxidation state.
In the reaction:
[tex]N^{+5} \longrightarrow N^{+2}[/tex]
The oxidation state decreases from +5 to +2, which means there is a decrease in oxidation state. So, reduction has taken place.
[tex]\rule[226]{226}{2}[/tex]
