Which of the following order of energies of molecular orbitals of $\mathrm{N}_{2}$ is correct?\

Question

Professor PC Thomas Classes · Answer

(a): For molecules such as $\mathrm{B}_{2}, \mathrm{C}_{2}, \mathrm{~N}_{2}$ etc. the increasing order of energies of various molecular orbitals is $\sigma 1 s<\sigma^{*} 1 s<\sigma 2 s<\sigma^{*} 2 s<\left(\pi 2 p_{x}=\pi 2 p_{y}\right)<\sigma 2 p_{z}<$ 
$ \left(\pi^{*} 2 p_{x}=\pi^{*} 2 p_{y}\right)<\sigma^{*} 2 p_{z} $