Chapter 10, Problem 10.13QP

Interpretation Introduction

Interpretation:

The term dipole moment with its units and symbol has to be defined.

Concept Introduction:

The polar molecules possess dipole moment due the charge separation in it. There is no charge separation in the non-polar molecules.  So, non-polar molecules do not possess dipole moment in them.

For example:

The diatomic molecule $\text{HCl}$ possess dipole moment due to the charge separation in it as shown here:

The crossed arrow represents the direction of the shift of electrons towards the highly electronegative chlorine atom form the least electronegative hydrogen atom.