Q. Which of the following does not exhibit tautomerism?

A) [image:12_image233.emf]
B) [image:12_image234.emf]
C) [image:12_image235.emf]
D) [image:12_image236.emf]
Explanation

(a)
The compounds which contain active methylene group at the adjacent position of carboxyl group show tautormerism.
[image:12_image467.emf]
This compound does not contain active methylene group, hence does not exhibit tautomerism. Moreover, this compound is highly stable due to extensive cross-conjugation.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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