Geometric isomerism is usually found in___________________?
Correct answer: B. Alkenes
- A. Alkanes
- B. Alkenes
- C. Alkynes
- D. Esters
Explanation
Geometric isomerism is common in alkenes because the pi bond prevents free rotation and each double-bonded carbon may carry two different groups. Alkanes rotate freely about single bonds, and alkynes have a linear triple-bond arrangement rather than cis-trans forms. The likely mistake is alkynes, because both alkynes and alkenes are unsaturated, but only the alkene arrangement commonly gives cis-trans isomerism.
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About Isomerism
Isomerism occurs when compounds have the same molecular formula but different atom arrangements or spatial orientations. The content includes chain, position, functional, metameric and tautomeric isomerism, along with geometrical and optical isomerism, including cis-trans forms, E/Z notation, chirality and enantiomers.
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