UPSC NDA I 2019 General Ability Solved Paper

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Question : 139 of 150

Marks: +1, -0

Dinitrogen (N‌2) and dioxygen (O‌2 ) are the main constituents of air but they do not react with each other to form oxides of nitrogen because

[NDA I 2019]

the reaction requires initiation by a catalyst
oxides of nitrogen are unstable
the reaction is endothermic and requires very high temperature
the stoichiometry of N‌2 and O‌2 in air is not ideal for the reaction to take place

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