What is the common name of CH₃CH₂CH₂COOH ?
CH₃CH₂CH₂COOH, a four-carbon carboxylic acid, is commonly known as butyric acid. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.