• # question_answer (a) How bond energy varies from $N_{2}^{-}$ to $N_{2}^{+}$ and why? (b) On the basis of molecular orbital theory what is similarity between (i) ${{F}_{2}},\,O_{2}^{--}$        (ii) $CO,\,{{N}_{2}},\,N{{O}^{+}}$?

(a) Bond energy of $N_{2}^{+}=$ Bond energy of $N_{2}^{-}$. This is because they have the same bond order. (Strictly speaking, $N_{2}^{-}$ is slightly less stable and hence has less bond energy than $N_{2}^{+}$ due to presence of greater number of electrons in the anti bonding molecular orbitals) (b) (i) Same bond order and bond length, (ii) Same bond order and bond length.