Question

why is the net dipole moment of BF3 zero..??

Answer 1

Boron trifluoride is has zero dipole moment although it has three polar B—F bonds. This is because BF3 has sp2 hybridisation and regular trigonal planal geometry. And hence the individual dipole moments of polar bonds get cancelled and overall dipole moment is zero.

Answer 2

Answer:

The net dipole moment of BeF3 is zero because the two equal bonds dipoles are in opposite directions and cancle each other