Question

State True or False.

Dipole moment if o-dichloro benzene is smaller than the theoretical value, while in case of o-nitrophenol, value is larger than the theoretical value.

• A. True
• B. False

Answer 1

The correct option is A True

Dipole moment of o-dichloro benzene is smaller than the theoretical value, while in case of o-nitrophenol, value is larger than the theoretical value.
In case of ortho dichloro benzene, there is lone pair lone pair repulsion between two chlorine atoms. due to this, $\theta$ increases and $\mu$ decreases.
In case of o-nitro phenol, due to intramolecular H bonding (attraction),$\theta$ decreases and $\mu$ increases.