The correct order of dipole moment of the molecules NH ₃ (I), BF ₃ (II), H ₂ O (III), NF ₃ (IV) is

Step-by-step solution

Dipole moment is a vector quantity. It is defined as the product of the magnitude of the charge and the distance between the centres of the positive and negative charges. Dipole moment of NF ₃ and NH ₃ The dipole moment of NH ₃ is larger than NF ₃ because in NH ₃ , the dipole moment vector of the bond and the lone pairs are in the same direction, while in NF ₃ , molecule, the dipole moment vector of the lone pair and the bond pairs are opposite in direction. Dipole moment of H ₂ O and NH ₃ They both have dipole mom