Question

BCl₃ is a planar molecule whereas NCl₃ is pyramidal because 

(a) BCl₃ has no lone pair of electrons but NCl3 has a lone pair of electrons 

(b) B—Cl bond is more polar than N—Cl bond

(c) Nitrogen atom is smaller than boron atom 

(d) N—Cl bond is more covalent than B—Cl bond

Answer 1

Correct option: (a) BCl₃ has no lone pair of electrons but NCl₃ has a lone pair of electrons

Explanation:

In BCl₃ there is sp² hybridisation (planar) in NCl₃ hybridisation is sp³ hence shape is pyramidal