Question Detail
Question
Which molecule is the most acidic?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Acidity is enhanced when the conjugate base is further stabilized. By placing an electron-withdrawing group on the ring, the phenoxide ion is further stabilized when the charge spreads over more atoms (greater delocalization). The methoxy group is electron-releasing and destabilizes the phenoxide.
Hint
Which substituent stabilizes the phenoxide ion?