Question

Which of the following molecule does not produce $HCl$ as one of the hydrolysed product?

• A. $NC{l}_3$
• B. $PC{l}_3$
• C. $AsC{l}_3$
• D. $SbC{l}_3$

Answer 1

The correct option is A $NC{l}_3$

$\to NC{l}_3+3H_{2}O\to N{H}_3+HOCl$
$\to PC{l}_3+3H_{2}O\to H_{3}P{O}_3+3HCl$
$\to AsC{l}_3+H_{2}O\to As(OH{)}_3+3HCl$
$\to SbC{l}_3+H_{2}O\to SbOCl+2HCl$

In the case of $NC{l}_3$, the water attacks the vacant $d$ orbitals of $Cl$ whereas in the others, attack occurs at the central atom. Hence in those cases it forms $HCl$.