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Dinitrogen ( N ₂ ) and dioxygen ( O ₂ ) are the main constituents of air but they do not react with each other to form oxides of nitrogen because

Options

  1. Athe reaction requires initiation by a catalyst
  2. Boxides of nitrogen are unstable
  3. Cthe reaction is endothermic and requires very high temperature
  4. Dthe stoichiometry of N ₂ and O ₂ in air is not ideal for the reaction to take place

Correct answer

C. the reaction is endothermic and requires very high temperature

Step-by-step solution

It is because: (i) the reaction is endothermic and requires very high temperature. (ii) the reaction can be initiated only in presence of a catalyst. (iii) oxides of nitrogen are unstable. (iv) N ₂ and O ₂ are unreactive.

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