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. $P_4$, $PCl_3$, $H_3PO_4$
• B. $P_4$, $PCl_5$, $H_3PO_3$
• C. $P_4$, $PCl_5$, $POCl_3$
• D. $P_4$, $PCl_3$, $POCl_3$

Answer 1

Answer: (C)

$P_4$, $PCl_5$, $POCl_3$

Answer 2

$\underset{\text{(A)}}{ {P4}} +$ ${10Cl_2 ->}$ $\underset{\text{(B)}}{ {4PCl5}}$ ${PCl_5 +C2H5OH -> C2H5Cl +POCl3 +HCl}$ ${PCl5 +H2O ->}$ $\underset{\text{(C)}}{ {POCl3}}+ {2HCl}$ ${POCl3 + 3H2O -> H3PO4 +3HCl}$