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WAEC Chemistry 2015 Objective — Question 7

Question 7 of 50 from the West African Examinations Council (WAEC) Chemistry 2015 Objective paper, with the correct answer and a full explanation.

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Which of the following pairs of compounds belongs to the same homologous series?

  • A. C₃H₈ and C₃H₆
  • B. C₄H₁₀ and C₅H₁₀
  • C. C₂H₄ and C₄H₁₀
  • D. C₂H₆ and C₄H₁₀Correct

Explanation

C₂H₆ (ethane) and C₄H₁₀ (butane) both fit the alkane general formula CnH2n+2, so they are in the same homologous series.

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