Question

why the dipole moment of BF3 is 0?​

Answer 1

Answer:

In BF3, the three flourine atoms are arranged in such a way that they form 120° each with the central boron atom(Trigonal planar geometry).Due to this symmetry, the individual B-F dipole moment cancels out resulting in the 0 dipole moment of BF3.

Answer 2

Answer:

• 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.

Explanation:

The three fluorine atoms are so attached to the boron that the resultant of  two fluorine atoms cancel with the third one.