Which of the following statement is not correct from the view point of molecular orbital theory?

Options

A. `Be_2` is not a stable molecule
B. `He_2` is not stable but `He_2^(+)` is expected to exist
C. Bond strength of `N_2` is maximum amongst the homonuclear diatomic molecules belonging to the second period
D. The order of energies of molecular orbitals in `N_2` molecule is `sigma 2s lt sigma^** 2s lt sigma 2p_z lt (pi 2p_x~~ pi 2p_y) lt (pi^** 2p_x~~ pi^** 2p_y) lt sigma^** 2p_z`

Answer

D

Explanation

The order of energies of molecular orbitals in `N_2` molecule is `sigma 2s lt sigma^** 2s lt sigma 2p_z lt (pi 2p_x~~ pi 2p_y) lt (pi^** 2p_x~~ pi^** 2p_y) lt sigma^** 2p_z`