Question

If B–Cl bond has a dipole moment, explain why $BCl_{3}$ molecule has zero dipole moment?

Answer 1

B-Cl has a dipole due to the difference in the elctronegativity of boron and chlorine atom. The overall dipole of a molecule also depends on the geometry. The geometry of BCl3 is planar with a bond angle of 120 degree. The resultant dipole of two B-Cl bonds cancels the third one, resulting in net zero dipole

please mark me as brainliest

Answer 2

The bond between B and Cl in BCl compound is polar in nature because of the difference between electronegativity of the two element in the compound.

Though ${ BCl }_{ 3 }$ is a non-polar molecule because the shape of ${ BCl }_{ 3 }$ is trigonal planar.

It is a symmetrical molecule. Hence, the "dipole moments" of the "B-Cl" bond "cancel each other" which causes zero dipole moment.