Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

${\mathrm{PCl}}_5$ on reaction with alcohol and carboxylic acid, replace $-\mathrm{OH}$ group with $-\mathrm{Cl}$. $$\begin{array}{rl}\mathrm{ROH}+{\mathrm{PCl}}_5⟶\mathrm{RCl}& +{\mathrm{POCl}}_3+\mathrm{HCl}\\ \mathrm{RCOOH}+{\mathrm{PCl}}_5⟶& {\mathrm{RCOCl}}^2\\ +& {\mathrm{POCl}}_3+\mathrm{HCl}\end{array}$$ Related Theory ${\mathrm{PCl}}_5$ is used as a chlorinating agent and dehydrating agent for the synthesis of pesticides, phosphite antioxidants, plasticizers and stabilizers for plastic and elastomers etc