Previous Year NEET Question- Chemical Bonds L-2

Question: Which one of the following statements is incorrect related to Molecular Orbital Theory?#

A) The $\pi^*$ antibonding molecular orbital has a node between the nuclei.

B) In the formation of bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other

C) Molecular orbitals obtained from $2 \mathrm{P}{\mathrm{x}}$ and $2 \mathrm{P}{\mathrm{y}}$ orbitals are not symmetrical around the bond axis.

D) A $\pi$-bonding molecular orbital has larger electron density above and below the internuclear axis.

Molecular orbitals obtained from $2 \mathrm{P}{\mathrm{x}}$ and $2 \mathrm{P}{\mathrm{y}}$ orbitals are not symmetrical around the bond axis.#

Solution:#

In the formation of $\mathrm{\sigma}$ MO, the two electron waves of the bonding atoms reinforce each other due to constructive interference. Molecular orbitals obtained from $2 \mathrm{P}{\mathrm{x}}$ and $2 \mathrm{P}{\mathrm{y}}$ orbitals are ‘symmetrical’ around bond axis.