Question

Which of the following sets of species have the same bond order?

• A. $N_2,O_2^{2+},N{O}^{+},C{N}^{-}$
• B. $N_2^{2-},O_2,N{O}^{-},N{O}_2^{+}$
  
• C. $NO,N_2^{-},O_2^{+},N{O}^{2+}$
• D. All are correct

Answer 1

The correct option is D All are correct

M.O configuration upto $14e^{-}$
$\sigma 1s^2<{\sigma }^{\ast }1s^2<\sigma 2s^2<{\sigma }^{\ast }2s^2<\pi 2p{x}^2=\pi 2p{y}^2<\sigma 2p_{<}^2{\pi }^{\ast }2p_x^0={\pi }^{\ast }2p_y^0$
Example : B.O for $N_2,C{N}^{-}$
$N_2$, B.O =3.0, $N_2^{-},$ B.O =2.5
$C{N}^{-}$, B.O=3.0 ; $N_2^{2-}$, B.O =2.0
M.O configuration for more than $14e^{-}$
$\sigma 1s^2<{\sigma }^{\ast }1s^2<\sigma 2s^2<{\sigma }^{\ast }2s^2<\sigma 2p{z}^2<(\pi 2p{x}^2=\pi 2p{y}^2)<({\pi }^{\ast }2p{x}^2={\pi }^{\ast }2p{x}^2={\pi }^{\ast }2p{y}^2)<\sigma 2p{z}^2$
For:-
$O_2,NO$
$O_2,B.O=2.0N{O}^{+},B.O=3.0$
$O_2^{+},B.O=2.5N{O}^{–},B.O=2.0$
$O_2^{2+},B.O=3.0N{O}^{2+},B.O=2.5$