Multiple choice

Carbolic acid is called _____

  1. Phenol

  2. Phenyl

  3. Benzene

  4. Benzoic acid

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A Correct answer
Explanation

Carbolic acid is the common name for phenol (C6H5OH). Phenyl is the C6H5- group, benzene is C6H6, and benzoic acid is C6H5COOH. The -OH group attached directly to the benzene ring gives phenol its acidic properties.