Question

Which of the following order of energies of molecular or bitals of $N_{2}$is correct?

• A. $(\pi 2p_{y}) < (\sigma 2p_{z}) < (\pi*2p_{x}) \approx (\pi*2p_{y})$
• B. $(\pi 2p_{y}) > (\sigma 2p_{z}) > (\pi*2p_{x}) \approx (\pi*2P_{y})$
• C. $(\pi 2P_{y}) < (\sigma 2P_{z}) > (\pi*2p_{x}) \approx (\pi*2P_{y})$
• D. $(\pi 2p_{y}) > (\sigma 2P_{z}) < (\pi*2p_{x}) \approx (\pi*2P_{y})$

Answer 1

Answer: (A)

$(\pi 2p_{y}) < (\sigma 2p_{z}) < (\pi*2p_{x}) \approx (\pi*2p_{y})$

Answer 2

: For molecules such as $B_{2},C_{2}N_{2}$etc. The increasing order of energies of various molecular orbitals is

$\sigma 1s < \sigma*1s < \sigma 2s < \sigma*2s < (\pi 2p_{x} = \pi 2py) < \sigma 2p_{z} < \sigma*2p_{z}$