AP EAPCET 06-Jul-2022 Shift 2 Paper

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 NF3 and NH3 The dipole moment of NH3 is larger than NF3 because in NH3, the dipole moment vector of the bond and the lone pairs are in the same direction, while in NF3, molecule, the dipole moment vector of the lone pair and the bond pairs are opposite in direction. Dipole moment of H2O and NH3 They both have dipole moment because they do not have regular geometries. Dipole moment of H2O is more than NH3 because O is more electronegative than N. Dipole moment of BF3 It is zero because it has symmetrical (triangular planar) structure.Therefore, the correct order of dipole moments of molecules is