Question

Identify the weakest acidic compound amongst the following

(a) p-nitrophenol                 

(b) p-chlorophenol

(c) p-cresol                         

(d) p-raminophenol

Answer 1

(d) p-Aminophenol
Electron-withdrawing substituents make the phenol more acidic, while electron-releasing substituents make the phenol less acidic. p-aminophenol < p-cresol < p-chlorophenol < p-nitrophenol