Which is the correct IUPAC name of the carboxylic acid that contains four carbon atoms?
A) butanoic acid
B) isobutyric acid
C) 2-butanoic acid
D) butyric acid

Question

Quizplus · Accepted Answer

Butanoic acid is the correct IUPAC name for the carboxylic acid with four carbon atoms, as it follows the IUPAC naming rule that prefixes the carbon chain with the number of carbon atoms (but-) followed by the suffix -anoic acid. Choice B, isobutyric acid, contains only three carbon atoms, while choice C, 2-butanoic acid, is the name of the same compound as butanoic acid but with a specific position of the carboxyl group indicated by the "2-". Choice D, butyric acid, is the name for the carboxylic acid with only two carbon atoms.

Which Is the Correct IUPAC Name of the Carboxylic Acid