WBBSEClass XPhysical ScienceOrganic Chemistry01 Mark2025 Easy

QQuestion

Identify the triple bond unsaturated hydrocarbon:

(a) CH₄

(b) C₂H₆

(c) C₂H₄

(d) C₂H₂

Exam-ready answer 01 Mark

Answer

(d) C₂H₂

Explanation

A triple bond unsaturated hydrocarbon is known as an alkyne. Alkynes contain at least one carbon-carbon triple bond (C≡C).

Among the given compounds:

  • CH₄ (Methane) → Saturated hydrocarbon (single bonds only)
  • C₂H₆ (Ethane) → Saturated hydrocarbon (single bonds only)
  • C₂H₄ (Ethene) → Unsaturated hydrocarbon (double bond)
  • C₂H₂ (Ethyne/Acetylene) → Unsaturated hydrocarbon (triple bond)
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