Which of the following order of energies of
moleuclar orbitals of `N_(2)` is correct ?

Options

A. `(pi 2p_y) lt (sigma 2p_z) lt (pi^(**) 2p_x) ~~ (pi^** 2p_y)`
B. `(pi 2p_y) gt (sigma 2p_z) gt (pi^** 2p_x) ~~ (pi^** 2p_y)`
C. `(pi 2p_y) lt (sigma 2p_z) gt (pi^** 2p_x) ~~ (pi^** 2p_y)`
D. `(pi 2p_y) gt (sigma 2p_z) lt (pi^** 2p_x) ~~ (pi^** 2p_y)`

Answer

A

Explanation

The correct increasing order of energies of molecular orbitals of `N_2` is given below.
`sigma1s lt sigma^** 1s lt sigma 2s lt sigma^** 2s lt (pi 2p_x ~~pi 2p_y) lt sigma 2p_z lt (pi^** 2p_x ~~pi^** 2p_y) lt sigma^** 2p_z`.