In a homologous series, adjacent members differ by a _ unit?
Correct answer: B. CH2
- A. CH3
- B. CH2
- C. CH
- D. CH4
Explanation
CH4, C2H6, and C3H8 are all consecutive alkanes in the homologous series, each differing from the next and previous compound by the presence and absence of one CH2 (methylene) group.
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About Classification of Organic Compounds
Organic compounds are classified by carbon skeleton into open-chain, branched-chain and cyclic compounds, including homocyclic and heterocyclic types. The classification also uses functional groups to distinguish hydrocarbons, halo compounds, alcohols, aldehydes, ketones, carboxylic acids and their derivatives, which is different from naming compounds by IUPAC rules.
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