Which of the following orderof energies of molecular orbitals of `N_(2)` is correct?

Options

A. `(pi 2p_(y)) lt (sigma 2p_(z)) lt (pi^(***)2p_(x))approx(pi^(***)2p_(y))`
B. `(pi2p_(y)) gt (sigma2p_(z)) gt (pi^(***)2p_(x)) approx(pi^(***)2p_(y))`
C. `(pi 2 p_(y)) lt (sigma2p_(z)) gt (pi^(***)2p_(x)) approx(pi^(***)2p_(y))`
D. `(pi 2p_(y)) gt (sigma2p_(z)) lt (pi^(***)2p_(x)) approx(pi^(***)2p_(y))`

Answer

A

Explanation

For molecules such as `B_(2), C_(2), N_(2) ` etc. the increasing order of energies of various molecular orbitals is
`sigma 1s lt sigma^(**) 1s lt sigma2s lt sigma^(**) 2s lt (pi 2p_(x) = pi 2p_(y)) lt sigma2p_(z) lt (pi^(**) 2p_(x) = pi^(**) 2p_(y)) lt sigma^(**) 2p_(z)`