Which of the following statement is not correct from the view point of molecular orbital theory?

Q. Which of the following statement is not correct from the view point of molecular orbital theory?

  1. Be2 is not a stable molecule
  2. He2 is not a stable but He2+ is expected to exist
  3. Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period

D. The order of energies of molecular orbitals in N2 molecule is 2s < *2s <  2pz < (  2px=          2py) < (  *2px=  *2py) <             *2pz     

Answer: The order of energies of molecular orbitals in N2 molecule is 2s <  *2s <  2pz < ( 2px=  2py) < (  *2px=  *2py)*2pz

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