Q11 / 90 · JEE Main 2022 (28 Jul Shift 2) · Chemistry

Dinitrogen and dioxygen the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because

  • A
    N2 is unreactive in the condition of atmosphere.
  • B
    Oxides of nitrogen are unstable.
  • C
    Reaction between them can occur in the presence of a catalyst.
  • Correct answer
    D
    The reaction is endothermic and require very high temperature.

Solution

Dinitrogen and dioxygen are the major constituents of air. These gases do not react with each other to form oxides of nitrogen because the reaction is endothermic and requires very high temperature. The dissociation energy of N2 is very high due to the presence of triple bond and it is very stable.

N2+O2⇄1483-2000 K2NO

Hence, the correct answer is option: 'D'.

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