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NDA 1 2025 GAT, question 82

Topic: Chemistry

Q82

Which one of the following nitrogen oxides may dimerize?

  1. (a) N2ON_{2}O
  2. (b) NO2NO_{2}Correct answer
  3. (c) N2O3N_{2}O_{3}
  4. (d) N2O5N_{2}O_{5}

Solution.

Answer: (b) NO2NO_{2}

  1. Nitrogen dioxide has an unpaired electron and can combine with another molecule to form dinitrogen tetroxide: 2NO2⇌N2O42NO_{2} \rightleftharpoons N_{2}O_{4}.
  2. This association of two identical molecules is dimerisation.