Question

Which of the following is not correct about Molecular Orbital theory?

• A. The atomic orbitals of comparable energies and proper symmetry combine to form molecular orbitals.
• B. The bonding molecular orbital has lower energy and hence greater stability than the corresponding anti-bonding molecular orbital.
• C. The molecular orbitals are not filled in accordance with the aufbau principle.
• D. An atomic orbital is mono-centric while a molecular orbital is polycentric.

Answer 1

The correct option is C

The molecular orbitals are not filled in accordance with the aufbau principle.

Here the options (a), (b) and (d) are correct. Now, while filling the energy level diagram of molecular orbitals, we have to follow all the rules which are followed when we fill or write the electronic configuration of the elements, i.e., Aufbau principle, Pauli's exclusion principle and Hund's rule.

Hence option (c) is incorrect and thus the correct answer.

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