Question

The `BCl_3` is a polar molecule whereas `NCl_3` is pyramidal because
A. `N-Cl` bond is more covalent than `B-Cl` bond
B. `B-Cl` bond is more polar than `N-Cl` bond
C. Nitrogen atom is smaller than boron
D. `BCl_3` has no lone pair but `NCl_3` has a lone pair of electron.

Answer 1

Correct Answer - D
`BCl_3` is `sp^3` hybridised hence planar whereas `NCl_3` is `sp^3` hybridised with one `1p`, hence is pyramidal.