Question

Which of the following fact(s) explain(s) as to why p-
nitrophenol is more acidic than phenol?
I. - I Effect of nitro group.
II. Greater resonance effect of $p$ -nitrophenoxy group
II. Steric effect of bulky nitro group

• A. I and II
• B. I and III
• C. II and III
• D. II alone

Answer 1

The correct option is A I and II

P nitrophenol is stronger acid than phenol

The nitro-group is an electron-withdrawing group. The presence of this group in the ortho or para position decreases the electron density in the OH bond. As a result, it is easier to lose a proton. ... Hence, ortho and para nitrophenols are stronger acids than phenol.