Question

Which has the least bond angle

• A. $NH_{3}$
• B. $BeF_{2}$
• C. $H_{2}O$
• D. $CH_{4}$

Answer 1

Answer: (C)

$H_{2}O$

Answer 2

Due to $lp - lp$ repulsions, bond angle in $H_{2}O$ is lower $(104^{o}.5^{o})$ than that in $NH_{3}(107^{o})$ and $CH_{4}(109^{o}28^{'})$. $BeF_{2}$ on the other hand, has sp-hybridization and hence has a bond angle of $180^{o}$.