Question

Which of the following compounds is a functional group isomer of $C_2{H}_{5}OH$?

• A. Ethanal, $C{H}_{3}CHO$
• B. Acetic acid, $C{H}_{3}COOH$
• C. Diethyl ether, $(C_2{H}_5{)}_{2}O$
• D. Dimethyl ether, $(C{H}_3{)}_{2}O$

Answer 1

The correct option is D Dimethyl ether, $(C{H}_3{)}_{2}O$

Alcohols with two or more carbon atoms can exhibit functional isomerism with ethers. Thus, ethers and alcohols have the same molecular formula but have different functional groups, hence they are called functional isomers.

$C{H}_3-C{H}_2-OH$ $C{H}_3-O-C{H}_3$

ETHANOL Dimethyl ether