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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3cb158

Which of the following statements about molecular orbitals is/are correct?

  1. AA bonding MO has lower energy than the atomic orbitals from which it is formed
  2. BA antibonding MO has a nodal plane between the two nuclei
  3. CThe number of MOs formed equals the number of atomic orbitals combined
  4. DElectron density in an antibonding MO is concentrated between the two nuclei

Answer: A, B, C

(A), (B) and (C) are basic statements of the LCAO picture. (D) is false: in an antibonding MO the electron density is depleted between the nuclei, where there is a node.
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