Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The correct option is C.

Both molecules have a trigonal pyramidal shape and sp³ hybridization, ruling out options A and D.

In NH₃, the N–H bond dipoles point towards nitrogen, reinforcing the lone pair's dipole moment.

In NF₃, the highly electronegative fluorine atoms pull electron density away, opposing the lone pair dipole.

This cancellation effect makes the net dipole moment of NF₃ ($0.8\times 10^{-30}Cm$) much smaller than that of NH₃ ($4.90\times 10^{-30}Cm$).