${\mathrm{N}}_{2\left(\mathrm{g}\right)}+{\mathrm{O}}_2\to 2{\mathrm{NO}}_{\left(\mathrm{g}\right)}- \mathrm{Energy}$ In the above reaction the condition for the higher production of NO is

The reaction ${\mathrm{N}}_{2\left(\mathrm{g}\right)}+{\mathrm{O}}_2\to 2{\mathrm{NO}}_{\left(\mathrm{g}\right)}- \mathrm{Energy}$is an endothermic reaction that will favors high temperature.