Q. Which of the following is a pair of functional isomers?
A) $CH_{3}COCH_{3},CH_{3}CHO$
B) $C_{2}H_{5}CO_{2}H,\ CH_{3}CO_{2}CH_{3}$
C) $C_{2}H_{5}CO_{2}H,\ CHCO_{2}C_{2}H_{5}$
D) $CH_{3}CO_{2}H,\ CH_{3}CHO$
Explanation
(b)
Carboxylic acid and esters show functional group isomerism. When two compounds have same molecular formula but different functional groups, then functional isomerism arises.
e.g.,
$C_{2}H_{5}COOH\$and$\ CH_{3}COOCH_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.