The electronegaivity difference between `N` and `F` is greater than that between ` N` and `H` yet the dipole moment of `NH_3` ( 1 .5 D) is larger than that of ` NF_3 ( 0. 2 D)`. This is because :

Options

A. In `NH_3` the atomic dipole and bond dipole are in the same direction whereas in `NF_3`. They are in opposite directions.
B. in `NH_3` as well as `NF_3` the atomic dipole and bond dipole are in opposite direction .
C. in `NH_3` the atomic dipole and bond dipole are in the opposite directions whereas in `NF_3` these are in the same direction
D. in `NH_3` as well as in `NF_3` the atomic dipole and bond dipole are in the same direction.

Answer

A