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Asked in Premeth Test 15 — Organic Chemistry Concepts and Hydrocarbons (17 March 2025) 2025

Which one of the following is a cyano group?

Correct answer: C. -CN

  • A. -SH
  • B. -COOH
  • C. -CN
  • D. -COOR

Explanation

The name "cyano" comes from the Greek word "κυανος," which means "dark blue." This is because cyanides, which are compounds that contain the cyano group, are often blue in color. The cyano group is a functional group that consists of a carbon atom triple-bonded to a nitrogen atom. The carbon atom in the cyano group is sp-hybridized, and the nitrogen atom is sp2-hybridized. The cyano group is often abbreviated as -CN.

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About Functional Groups

Functional groups are specific atoms or atom groups that determine the characteristic reactions and properties of organic compounds. Coverage includes alkenes, alkynes, halo, hydroxyl, ether, carbonyl, carboxyl, ester, amino and nitro groups, together with their structures, nomenclature and related homologous series.

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