Question

Which of the following produces $PC{l}_3$ ?

• A. By treating white phosphorus in an aqueous solution containing dissolved $C{l}_2$
• B. When white phosphorus is treated with a jet of dry Chlorine gas
• C. By hydrolysis of $PC{l}_5$
• D. By hydrolysis of $P{H}_3$

Answer 1

The correct option is B When white phosphorus is treated with a jet of dry Chlorine gas

When white Phosphorus reacts with Chlorine gas,

$P_4+6C{l}_2\to 4PC{l}_3$White phosphorus does not seem to yield the same product in an aqueous solution containing dissolved $C{l}_2$.Note that $PC{l}_3$ is very highly toxic and corrosive. Its production is regulated and controlled according to the chemical weapons convention.