Which functional group is present in CH₃CH₂COOH?
CH₃CH₂COOH (propanoic acid) contains the -COOH group, characteristic of carboxylic acids.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance