# 8.3 Justify that the following reactions are redox reaction(e) $4NH_{3}_{(g)}+5O_{2}_{(g)}\rightarrow4NO_{(g)}+6H_{2}O_{(g)}$

here $N (-3)\rightarrow N(+2)$ oxidation reaction
and $O(0)\rightarrow O(-2)$ reduction reaction (oxidation state of oxygen is zero at molecular state )