JEE MAIN - Chemistry (2022 - 28th July Evening Shift - No. 6)
Dinitrogen and dioxygen, the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because :
$$\mathrm{N}_{2}$$ is unreactive in the condition of atmosphere.
Oxides of nitrogen are unstable.
Reaction between them can occur in the presence of a catalyst.
The reaction is endothermic and require very high temperature.
Explanation
$\mathrm{N}_{2}$ is unreactive, its reaction with oxides is endothermic and require very high temperature.
$$ \mathrm{N}_2+\mathrm{O}_2 \overset{{(1483-2000 \mathrm{~K})}}\leftrightharpoons 2 \mathrm{NO} $$
(Endothermic and feasible at high temperature)
$$ \mathrm{N}_2+\mathrm{O}_2 \overset{{(1483-2000 \mathrm{~K})}}\leftrightharpoons 2 \mathrm{NO} $$
(Endothermic and feasible at high temperature)
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