Chemistry Fundamental Principles of Organic Chemistry SZABMU 2023
PMDC Verified Question 22 of 83
Isomerism due to shifting of proton from one atom to another in a same molecule is known as:
A
Metamerism
B
Tautomerism
C
Position
D
Functional
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Tautomerism
Concept:

Tautomerism is a dynamic form of structural isomerism where isomers interconvert rapidly through the migration of an atom or group—most commonly a hydrogen atom (proton).

Solution:

  • The question explicitly describes the mechanism of tautomerization.


  • A classic example is keto-enol tautomerism, where a proton moves from an alpha-carbon to a carbonyl oxygen, accompanied by a shift of the pi bond.


Why other options are incorrect:

Metamerism involves unequal alkyl distributions. Position isomerism involves moving a functional group along a static carbon skeleton. Functional isomerism involves entirely different chemical families.

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