Question

Among the following compounds:

I) Phenol II) Methylphenol III) m-nitrophenol IV) p-nitrophenol

The acidity order is:

• A. IV > III > I > II
• B. III > IV > I > II
• C. I > IV > III > II
• D. II > I > III > IV

Answer 1

The correct option is A

IV > III > I > II

Group with -I effect increases the acidity of phenol. The effect is more when the group is present at para position. Methyl group is the group with +I effect, hence it is least acidic.