Q. Phenolphthalein is formed by condensation of phthalic anhydride and $\phi\ OH$. Which structure shows colour in basic medium?
A) [image:11_image166.emf]
B) [image:11_image167.emf]
C) [image:11_image168.emf]
D) All of the above
Explanation
(b)
Structure of phenolphthalein in basic medium is as follows.
[image:11_image315.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.