Compare dipole moment in BF3 and BF4-
Dear Student,
BF3 has triagonal planar shape while BF4- has a tetrahedral shape. BF3 being symmetrical in shape and all the bonds are identical, so it will have zero dipole moment i.e. it will be non polar. BF4- also has a symmetrical shape also all the bonds are identical and the vector sum of all the bond moment equals zero, so the net dipole moment will also be zero.
Therefore, both the compounds are non polar.
BF3 has triagonal planar shape while BF4- has a tetrahedral shape. BF3 being symmetrical in shape and all the bonds are identical, so it will have zero dipole moment i.e. it will be non polar. BF4- also has a symmetrical shape also all the bonds are identical and the vector sum of all the bond moment equals zero, so the net dipole moment will also be zero.
Therefore, both the compounds are non polar.