Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because _______.

the reaction can be initiated only in presence of a catalyst.

the reaction is endothermic and requires very high temperature.

oxides of nitrogen are unstable.

\[{{N}_{2}}\] and \[{{O}_{2}}\] are unreactive.

Dinitrogen and dioxygen are main constituents of air but these do not

1.	Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because _______.
A.	the reaction is endothermic and requires very high temperature.
B.	the reaction can be initiated only in presence of a catalyst.
C.	oxides of nitrogen are unstable.
D.	\[{{N}_{2}}\] and \[{{O}_{2}}\] are unreactive.
Answer» B. the reaction can be initiated only in presence of a catalyst.