Question

Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of $conc.H_{2}S{O}_4$ ?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C


As phthalic anhydride being bulky, electrophilic substitution reaction occurs at para position in phenol or its derivatives

Compound (b) does not condense with phthalic anhydride because para position is blocked.

Hence, option (b) is correct.