Question

Topic : Mololecular orbital theory

The correct order of the energy of molecular orbitals in a molecules having four electrons
Options are :
1) sigma 2s > sigma 2pz > pi 2px
2) sigma 2s < pi 2p < sigma 2pz
3) sigma 2s< sigma 2pz = pi 2px
4) sigma 2pz < sigma 2s < pi 2px
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Answer 1

2. sigma 2s < pi 2p < sigma 2pz