Asked in PMC Practice Test 34 (2021) 2021Moderate

The organic compounds having close resemblance in structure as well as properties are:

Correct answer: D. Methanal and acetone

  • A. Glycol and cyclohexanol
  • B. Formaldehyde and benzol
  • C. Diethyl ether and ethyl alcohol
  • D. Methanal and acetone

Explanation

Methanal is an aldehyde while acetone is a ketone. Both compounds have a similar structure as they contain a carbonyl group. They also show some common reactions such as nucleophilic addition and thus have common properties.

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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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