Among the following the molecule with the highest dipole moment is

Step-by-step solution

For polar molecule dipole moment, μ depends upon geometry. Symmetrical molecule is non-polar even through it contains polar bonds. Bond dipole moment of C − H and C − Cl bond reinforce on one another. In CHCl 3 the resultant C − H and C − Cl dipoles oppose the resultant of two C − Cl dipoles, while in CH 2 Cl 2 the resultant of C − H dipoles add to resultant of two C − Cl . In case of CH 3 Cl the resultant of two C − H dipoles add to the resultant of C − H and C − Cl dipoles. Thus dipole moment of CH 3 Cl is highes