Question

What is the IUPAC name of the compound \( \text{CH}_3\text{CH}_2\text{COOH} \)?

• A. Ethanoic acid
• B. Propanoic acid
• C. Butanoic acid
• D. Acetic acid

Hint:

The IUPAC name of a carboxylic acid is based on the longest carbon chain, with the suffix "-oic acid".

Answer 1

The Correct Option is B

Step 1: Analyze the compound The given compound is \( \text{CH}_3\text{CH}_2\text{COOH} \). This is a carboxylic acid with a three-carbon chain. - The functional group is \( \text{COOH} \), which is the carboxyl group. - The parent chain contains 3 carbon atoms. Step 2: Name the compound The IUPAC name of a carboxylic acid is based on the number of carbon atoms in the longest chain containing the carboxyl group: - A three-carbon chain is named "propane". - Since the compound contains a carboxyl group, the suffix is "-oic acid". Thus, the IUPAC name of the compound is "propanoic acid". Answer: Therefore, the IUPAC name of the compound \( \text{CH}_3\text{CH}_2\text{COOH} \) is propanoic acid. So, the correct answer is option (2).