Arrange the following species in increasing order of their bond lengths: . — Chemical Bonding Chemistry Question
Question
Arrange the following species in increasing order of their $N-O$ bond lengths: $NO^+, NO_2, NO_2^-, NO_3^-$.
Answer: A
💡 Solution & Explanation
Calculate bond orders: $NO^+$ ($N \equiv O$ BO=3), $NO_2$ (odd electron BO=2.5), $NO_2^-$ (resonance BO=1.5), $NO_3^-$ (resonance BO=1.33). Since bond length $\propto 1/\text{Bond Order}$, the order is $NO^+ < NO_2 < NO_2^- < NO_3^-$.
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