The suffix -oic acid indicates which functional group?

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Study for the IMAT Chemistry Exam. Access flashcards and multiple choice questions; hints and explanations included for each question. Prepare effectively for your exam.

Multiple Choice

The suffix -oic acid indicates which functional group?

Explanation:
In IUPAC naming, the suffix tells you the main functional group present. The ending -oic acid is used for carboxylic acids, because they contain the carboxyl group -COOH. This is different from the endings for other common groups: -ol for alcohols, -al for aldehydes, and -one for ketones. So seeing -oic acid signals a carboxylic acid, as in ethanoic (acetic) acid, which has the -COOH group responsible for its acidic behavior.

In IUPAC naming, the suffix tells you the main functional group present. The ending -oic acid is used for carboxylic acids, because they contain the carboxyl group -COOH. This is different from the endings for other common groups: -ol for alcohols, -al for aldehydes, and -one for ketones. So seeing -oic acid signals a carboxylic acid, as in ethanoic (acetic) acid, which has the -COOH group responsible for its acidic behavior.

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