Applications of dipole moment are : (i) To decide polarity of the molecule : Molecules having zero dipole moment are said to be non-polar molecules and those having $\mu_R$ ≠ 0 are polar in nature. (ii) To determine percentage of ionic character : Percentage of ionic character = × 100 (iii) To determine geometry of molecules: The values of dipole moments provide valuable information about the structures of molecules. (a) $\mathrm{CO}_2, \mathrm{CS}_2$ are linear as values of their dipole moments are zero. (b) $\mathrm{H_2O}$ is non-linear as it has a net dipole moment.