Question

Which of the following will have the least bond angle?

• A. $C{H}_4$
• B. ${NH}_3$
• C. $P{H}_3$
• D. $H_{2}O$

Answer 1

The correct option is C

$P{H}_3$

$P{H}_3$ is a trigonal pyramidal molecule. The length of the $P-H$ bond is 1.42 Å and the $H-P-H$ bond angles are 93.5°, which is the least among the given compounds.