Question:
Which of the following statement is not correct from the viewpoint of molecular
orbital theory?
(i) Be2 is not a stable molecule.
(ii) He2 is not stable but He2+
is expected to exist.
(iii) Bond strength of N2 is maximum amongst the homonuclear diatomic
molecules belonging to the second period.
(iv) The order of energies of molecular orbitals in N2
molecule is
σ2s < σ*2s < σ2pz< (π2px = π2py ) < (π*2px= π*2py) < σ*2pz
Solution:
Option (iv) is the answer.
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