Asked in PMC Practice Test 18 (2021) 2021Moderate

Acyclic hydrocarbons are also called:

Correct answer: B. Open chain hydrocarbons

  • A. Closed chain hydrocarbons
  • B. Open chain hydrocarbons
  • C. Ring compounds
  • D. Alicyclic compounds

Explanation

OPTION A: Closed-chain hydrocarbons are also called cyclic or alicyclic hydrocarbons. In these, the carbon atoms are arranged in closed-chain forms. OPTION B: In open-chain hydrocarbons, carbon atoms are linked to each other in open chains, which may be a straight chain or a branched chain. It is also called Acyclic hydrocarbons. Hence, B is the correct option.

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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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