Q. $BCl_{3}$ is a planar molecule, while $NCl_{3}$ is pyramidal, because
A) N – Cl bond is more covalent than B – Cl bond
B) Nitrogen atom is smaller than boron atom
C) B – Cl bond is more polar than N – Cl bond
D) $BCl_{3}$ has no lone pair of electrons but $NCl_{3}$ has a lone pair of electrons
Explanation
(d)
$BCl_{3}$ has trigonal planar structure due to 3 bond pairs in the valence shell of boron whereas $NCl_{3}$ has distorted tetrahearal structure due to one lone pair and three bond pair in the valence shell of nitrogen.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.