Which of the following misnamed?
Correct answer: C. Carboxyl benzene
- A. Aniline
- B. Methyl naphthalene
- C. Carboxyl benzene
- D. Benzene sulphonic acid
Explanation
The correct answer is Option C: Carboxyl benzene. The name 'Carboxyl benzene' is misnamed because the correct nomenclature for a benzene ring with a carboxyl group is 'benzoic acid' (C6H5COOH). Option A, 'Aniline', is correctly named as it refers to an aromatic amine with the formula C6H5NH2. Option B, 'Methyl naphthalene', is a correct name for a naphthalene derivative. Option D, 'Benzene sulphonic acid', is also correctly named, representing a benzene ring with a sulphonic acid group attached. Thus, Option C is the only misnamed compound.
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About Carboxylic Acids
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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