Q. Phenol is heated with phthalic anhydride in presence of conc $H_{2}SO_{4}.$ The product gives pink colour with alkali. The product is
A) Phenolphthalein
B) Bakelite
C) Salicylic acid
D) Fluorescein
Explanation
(a)
Phenol is heated with phthalic anhydride in presence of $conc\ H_{2}SO_{4}$ to given phenolphthalein which gives pink colour with alkali
[image:11_image261.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.