Question

The bond angle in $AsH _{3}$ is greater than that in

• A. $NH_3$
• B. $H_2O$
• C. $BCl_3$
• D. None of these

Answer 1

Answer: (D)

None of these

Answer 2

$BCl _{3}$ has bond angle equal to $120^{\circ}$ (trigonal planar).
$NH _{3}$ and $H _{2} O$ have $s p^{3}$ hybridisation but due to the presence of lone pair of electrons, they have bond angle less than $109^{\circ} 28^{\prime}$ $\left( NH _{3}-107^{\circ}, H _{2} O -104.5^{\circ}\right), AsH _{3} \left(s p^{3}\right.$ hybridised) has smaller bond angle than $NH _{3}$ which is 91.8o due to less electronegativity of As than $N$.

So, the correct answer is (D): None of these