Question

A translucent white waxy solid 'A' reacts with excess of chlorine to give a yellowish white powder 'B'. 'B' reacts with organic compounds containing $-OH$ group converting them into chloro derivatives. 'B' on hydrolysis gives 'C' and is finally converted to phosphoric acid. 'A', 'B' and 'C' are

• A. $P_4,PC{l}_3,H_{3}P{O}_4$
• B. $P_4,PC{l}_5,H_{3}P{O}_3$
• C. $P_4,PC{l}_5,POC{l}_3$
• D. $P_4,PC{l}_3,POC{l}_3$

Answer 1

Answer: (C)

$\underset{\left(A\right)}{P_4}+10C{l}_2\to \underset{\left(B\right)}{4PC{l}_5}$
$PC{l}_5+C_2{H}_{5}OH\to C_2{H}_{5}Cl+POC{l}_3+HCl$
$PC{l}_5+H_{2}O\to \underset{\left(C\right)}{POC{l}_3}+2HCl$
$POC{l}_3+3H_{2}O\to H_{3}P{O}_4+3HCl$