Q. When propionic acid is treated with aqueous sodium bicarbonate, $CO_{2}$ is liberated. The $C$ from $CO_{2}$ comes from
A) Methyl group
B) Carboxylic acid group
C) Methylene group
D) Bicarbonate
Explanation
(d)
Carboxylic acids reacts with weaker bases such as bicarbonates producing$CO_{2}$. The $CO_{2}$ evolved comes from $NaHCO_{3}$, not from carboxylic group as shown below :
[image:12_image499.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.