Question

Identify the weak acidic compound amongst the following :

• A. $p$-nitrophenol
• B. $p$-chlorophenol
• C. $p$-cresol
• D. $p$-aminophenol

Answer 1

Answer: (D)

$p$-aminophenol

$N{H}_2$ group present at para position of phenol shows $+M$ effect which increases the charge density on benzene ring therefore the anion formed after proton removal will be less stable, hence p-aminophenol will be weakly acidic.