Question

Consider the following phenols :
The decreasing order of acidity of the above phenols is

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

Answer 1

Answer: (A)

Electron withdrawing group $(-N{O}_2)$ increases the acidity while electron releasing group $(-C{H}_3,-H)$ decreases acidity. Also effect will be more if functional group is present at para position than ortho and meta position.