Generic formula of cycloalkane is:
Correct answer: B. CnH2n
- A. CnH2n+2
- B. CnH2n
- C. CnH2n - 1
- D. CnH2n - 2
Explanation
It is because cycloalkane has the same generic formula as the alkenes which is CnH2n. Option A gives the generic formula of CnH2n+2 which belongs to the straight-chain alkanes. Option C is incorrect since CnH2n-1 is a formula of radicals (alkyls). Option D has CnH2n-2 which belongs to the alkynes.
This question appeared on the PMC National MDCAT 2020 paper, which you can sit online with every answer explained.
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About Alkanes
Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.
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