Which has the Highest Dipole Moment and Gives the Order CH3Cl, CH2Cl2, CHCl3 or CCl4

Answer: Dipole moment tells about the polarity of the bond. It is a vector quantity that tells about both magnitude and direction. In CCl₄ the dipole moment is zero because this molecule possesses perfect symmetry. Hybridization of this molecule is sp³. The more perfect the molecule is, the more is the non-polarity of the molecule. The highest dipole moment of the molecule is CH₃Cl. In this molecule, only one C-Cl bond is present to reduce the dipole of the 3 C-H bond. The order of the dipole moment is CH₃Cl > CH₂Cl₂ > CHCl₃ > CCl₄