Asked in PMC Practice Test 24 (2021) 2021Moderate

Isopentane is an example of _.

Correct answer: B. Branched chain compounds

  • A. Aromatic compounds
  • B. Branched chain compounds
  • C. Alicyclic compounds
  • D. None of these

Explanation

The IUPAC name of Isopentane is Methybutane having the formula: C5H12. Since it has one methyl group attached, which serves as a compound forming the branch, making isopentane to be a branched chain compound. Following this, option 'B' is the correct option. For such questions, candidates are always advised to first draw the structure on the piece of paper and then judge the options accordingly.

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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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