Question

Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid $[ A ]$ and $[ B ]$ are respectively

• A. $P _4 O _6$ and $H _3 PO _3$
• B. $PCl _5$ and $H _3 PO _4$
• C. $PCl _3$ and $H _3 PO _3$
• D. $POCl _3$ and $H _3 PO _4$

Answer 1

The Correct Option is C

$P_4+8SOC{l}_2\to \underset{[A]}{4PC{l}_3}+4S{O}_2+2S_{2}C{l}_2$
$PC{l}_3+3H_{2}O\to \underset{[B]}{H_{3}P{O}_3}+3HCl$