WAEC Chemistry 2023 Objective — Question 26
Question 26 of 50 from the West African Examinations Council (WAEC) Chemistry 2023 Objective paper, with the correct answer and a full explanation.
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The pair of compounds that belongs to the same homologous series is
- A. C3H8 and C3H6
- B. C4H10 and C5H10
- C. C2H4 and C4H10
- D. C2H6 and C4H10Correct
Explanation
C3H8 (propane, an alkane) and C3H6 (propene, an alkene) do not belong to the same series; same for C4H10 (butane, alkane) and C5H10 (pentene, alkene); and for C2H4 (ethene, alkene) and C4H10 (butane, alkane). C2H6 (ethane) and C4H10 (butane) both belong to the alkane family, so they are in the same homologous series.
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