Assertion : In $\mathrm{NH}_{3}, \mathrm{~N}$ is $s p^{3}$ hybridised but bond angle is $107^{\circ}

Question

Assertion : In $\mathrm{NH}_{3}, \mathrm{~N}$ is $s p^{3}$ hybridised but bond angle is $107^{\circ}$.\ Reason : Shape of $\mathrm{NH}_{3}$ molecule is trigonal pyramidal.

Professor PC Thomas Classes · Answer

(b) : $\mathrm{NH}_{3}$ molecule has three bond pairs and one lone pair of electrons.\ Lone pair-bond pair repulsions are greater than bond pairbond pair repulsions and hence result in deviation from ideal tetrahedral angle $109.5^{\circ}$.