The general formula CnH2n could represent
Correct answer: D. an alkene or a cycloalkane
- A. an alkane
- B. an alkyne
- C. an alcohol
- D. an alkene or a cycloalkane
Explanation
Both an alkene, with one double bond, and a cycloalkane, with one ring, have two hydrogens fewer than the corresponding alkane, so they share this general formula and are functional isomers of each other. Alkanes are CnH2n+2 and alkynes CnH2n-2. This is why a general formula alone can never identify a compound with certainty.
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About Functional Groups
Functional groups are specific atoms or atom groups that determine the characteristic reactions and properties of organic compounds. Coverage includes alkenes, alkynes, halo, hydroxyl, ether, carbonyl, carboxyl, ester, amino and nitro groups, together with their structures, nomenclature and related homologous series.
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