Q. The bond angles of $NH_{3},NH_{4}^{+}and\ NH_{2}^{-}$are in the order
A) ${NH}_{2}^{-} > NH_{3} > NH_{4}^{+}$
B) $NH_{4}^{+} > NH_{3} > NH_{2}^{-}$
C) $NH_{3} > NH_{2}^{-} > NH_{4}^{+}$
D) $NH > {NH}_{4}^{+} > NH_{2}^{-}$
Explanation
(b)
As the number of lone pairs of electrons increases, bond angle decreases. Thus, the order of bond angle is
$NH_{4}^{+} > NH_{3} > NH_{2}^{-}$
$(no\ lp)$ ($1\ lp)$ ($2lp$)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.