Multiple choice Carbolic acid is called _____ Phenol Phenyl Benzene Benzoic acid Reveal answer Fill a bubble to check yourself 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.