Question

Determine the product formed when phosphine gas is mixed with chlorine gas

• A. The mixture only cools down
• B. $PH _{3} \cdot Cl _{2}$ adduct is formed with warming up
• C. $PCl _{5}$ and $HCl$ are formed and the mixture cools down
• D. $PCl _{3}$ and $HCl$ are formed and the mixture warms up

Answer 1

Answer: (C)

The reaction of phosphine gas with chlorine gas is given as,
$PH _{3}+4 Cl _{2} \rightarrow PCl _{5}+3 HCl$
Therefore, the products formed when phosphine gas is mixed with chlorine gas are $PCl _{5}$ and $HCl$.
The mixture will cool down later.