Which of the following is also known as Carbolic Acid?
Phenol
Phenol (C6H5OH) is the aromatic compound historically known as Carbolic Acid. It was first isolated from coal tar and famously used by Joseph Lister (1860s) as an antiseptic in surgery. Its acidic nature comes from the –OH group attached to the benzene ring.
Hydroxide (OH–) is merely an ion, sulphuric acid (H2SO4) is an inorganic mineral acid, and ethanol (C2H5OH) is an aliphatic alcohol — none of these is Carbolic Acid.
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