Comprehension Nitrogen forms the largest number of oxides as it is capable of forming stable mul...
0Comprehension
Nitrogen forms the largest number of oxides as it is capable of forming stable multiple bonds with oxygen. They range from \( \mathrm{N}_{2} \mathrm{O}(\mathrm{O} . \mathrm{S} \) of nitrogen +1\( ) \) through \( \mathrm{NO}, \mathrm{N}_{2} \mathrm{O}_{3}, \mathrm{NO}_{2}, \mathrm{~N}_{2} \mathrm{O}_{4} \) to \( \mathrm{N}_{2} \mathrm{O}_{5}(\mathrm{O} . \mathrm{S} \) of nitrogen +5\( ) \). Following points are important regarding the study of oxides of nitrogen.
(a) All oxides of nitrogen except \( \mathrm{N}_{2} \mathrm{O}_{5} \) are endothermic as a large amount of energy is required to dissociate the stable molecule of oxygen and nitrogen.
(b) The small electronegativity difference between oxygen and nitrogen make \( \mathrm{N}-\mathrm{O} \) bond easily breakble to give oxygen and hence oxides of nitrogen are said to be better oxidising agents.
(c) Except \( \mathrm{N}_{2} \mathrm{O}_{5} \), all are gases at ordinary temperature. \( \mathrm{N}_{2} \mathrm{O}_{3} \) is stable only at lower temperature \( (253 \mathrm{~K}) \).
(d) Except \( \mathrm{N}_{2} \mathrm{O} \) and \( \mathrm{NO} \) which are neutral oxides, all are acidic oxides which dissolve in water forming orresponding oxy acids.
(e) They are also good example for illustrating the concept of resonance.
The gas which is acidic in nature is:
(a) \( \mathrm{NO} \)
(b) \( \mathrm{N}_{2} \mathrm{O} \)
(c) \( \mathrm{NO}_{2} \)
(d) Both \( (a) \) and (c)
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