Chemistry Fundamental Principles of Organic Chemistry SZABMU 2022
PMDC Verified Question 40 of 83
The type of isomerism arising due to shifting of proton from one atom to another in the same molecule is:
A
Chain isomerism
B
Metamerism
C
Tautomerism
D
Position isomerism
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Tautomerism
Concept:

Isomerism caused by the migration of a hydrogen atom (proton) accompanied by the switching of a single and double bond is known as tautomerism.

Solution:

  • Tautomers are dynamic structural isomers that exist in equilibrium with each other.


  • The most common example is keto-enol tautomerism, where a proton shifts from an alpha-carbon to the carbonyl oxygen, forming an enol.


  • The question explicitly defines this proton-shifting phenomenon.


Why other options are incorrect:

Chain, position, and metamerism do not involve dynamic equilibrium proton shifts.

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