Which one is the most acidic compound?

Options

A.
B.
C.
D.

Answer

C

Explanation

Electron-withdrawing gourps `(EWG)` like `-NO_(2)` which stablize the phenoxide ion further by dispersing the negative charge increase the acidic strength of phenols. On the other hand, electron-donating groups `(EDG)` like `CH_(3)` which destabilizes the phenoxide ion by intensifying the negative charges decrease the acidic strength of phenols Further, greater the number of electron - withdrawing groups at o-and p-positionsk, more acidic is the phenol. Thus, correct order of acidic strength is: `(3) gt (2) gt (1) gt (4)`