Q. The $–OH$ group of an alcohol or the $–COOH$ group of a carboxylic acid can be replaced by $–CI$ using
A) Phosphorus pentachloride
B) Hypochlorus acid
C) Chlorine
D) Hydrochloric acid
Explanation
(a)
The –OH group of alcohol or the –COOH group of a carboxylic acid is replaced by –Cl using phosphorus pentachloride $(i.e.,PCl_{5})$
$ROH + PCl_{5} \rightarrow RCl + POCl_{3} + HCl$
alcohol
$RCOOH + PCl_{5} \rightarrow RCOCl + {POCl}_{3} + HCl$
acid
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.