If B-Cl bond has a dipole moment, explain why B$C{{l}_{3}}$ molecule has zero dipole moment

cbse
p-blockelements

#1

(1) B$C{{l}{3}}$ molecule due to s${{p}^{2}}$ hybridization of boron is trigonal planar molecule and has a symmetrical shape.
(2) Individual B-Cl bond has dipole, the molecule B$C{{l}
{3}}$ has a zero dipole moment. This is due to the fact that individual dipole moments cancel out on account of the symmetry of the molecule
as shown below :