Concept:Isomerism arising from the restricted rotation of a carbon-carbon double bond, leading to different spatial arrangements of attached groups, is called geometric isomerism.
Solution:- The carbon double bond (\( \text{C=C} \)) is rigid and prevents free rotation of the atoms attached to it.
- If identical groups are locked on the same side of the double bond, it is the cis-isomer.
- If identical groups are locked on opposite sides, it is the trans-isomer.
- This specific phenomenon is definitively known as geometric (cis-trans) isomerism.
Why other options are incorrect:Chain, metamerism, and tautomerism are structural isomers that differ in actual bond connectivity, whereas geometric isomers have the exact same structural connectivity but different spatial orientation (stereoisomerism).
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