Chemistry Fundamental Principles of Organic Chemistry UHS 2024
PMDC Verified Question 5 of 83
Which type of isomerism is displayed by compounds having same structural formula but different position of atoms on both sides of carbon double bond?
A
Chain
B
Geometric
C
Metamerism
D
Tautomerism
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Geometric
Concept:

The rigid nature of a pi-bond in a carbon-carbon double bond prevents free rotation, locking substituents into specific 3D spatial orientations relative to each other.

Solution:

  • Because the connectivity (structural formula) is the same, but the spatial arrangement (position in space) differs across the rigid double bond, this falls under stereoisomerism.


  • Specifically, this is the exact definition of geometric isomerism (yielding cis and trans isomers).


Why other options are incorrect:

Options A, C, and D are all forms of structural isomerism, which require breaking and reforming sigma bonds in different connective patterns, unlike geometric isomerism.

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