Q. A carboxylic acid can best be converted into acid chloride by using
Aldehydes Ketones and Carboxylic Acids
Solution:
Use of $SOCl _2$ and $ClCOCOCl$ forms gaseous byproducts which can be easily removed, giving better yield of $RCOCl$. Further, oxalyl chloride is particularly easy to use becasue any excess of it can be easily evaporated due to its low b.p. $\left(62^{\circ} C \right)$
