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Which of the following nitrogen oxides contain one or more N–N bonds? (i) N2O (ii) N2O3 (iii) N2O4 (iv) N2O5

1. (i) and (ii)
2. (ii), (iii) and (iv)
3. (iii) and (iv)
4. (i), (ii) and (iii)

Correct answer: (i), (ii) and (iii)

Solution

N2O, N2O3, and N2O4 all contain N–N bonds due to their molecular structures, where nitrogen atoms are bonded to each other. In contrast, N2O5 does not have an N–N bond, as it consists of nitrogen and oxygen without direct nitrogen-to-nitrogen connections.

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