0653.C11.1.04 — Describe the general characteristics of a homologous series as: (a) . having the same general formula (recall of specific general formulas i: past paper questions
Real questions on 0653.c11.1.04 — describe the general characteristics of a homologous series as: (a) . having the same general formula (recall of specific general formulas i
The newest 6 of 6 written questions. Open one to see it on the real paper.
- 0653/42 · October/November 2025 · Q6a(i)[1]
Organic compounds in the same homologous series as ethene have the general formula C n H 2n . Deduce the general formula for the homologous series to which ethane belongs.
See it on the paper → - 0653/42 · October/November 2025 · Q6a(ii)[1]
Name the homologous series to which ethene belongs and to which ethane belongs. ethene
See it on the paper → - 0653/42 · May/June 2025 · Q6a[2]
State two general characteristics of a homologous series.
See it on the paper → - 0653/43 · May/June 2025 · Q6b(ii)[2]
The alkenes in Table 6.2 are members of the same homologous series. State two ways the information in Table 6.2 supports this statement.
See it on the paper → - 0653/22 · May/June 2023 · Q26[1]
Which statements about the members of an homologous series are correct?
See it on the paper → - 0653/22 · May/June 2022 · Q25[1]
Which statement about homologous series is correct?
See it on the paper →
What examiners said
Most candidates stated two general characteristics of homologous series. A common error was to refer to the same chemical formula rather than the same general formula. A common misconception was that homologous series only contain hydrogen and carbon (alcohols such as methanol also contain oxygen).
— Examiner report, May/June 2025, 0653/42 Q6(a) (Cambridge)
Many candidates gained credit for explaining how each additional carbon needs two additional hydrogen atoms. Some candidates used other information from the table to describe the trend in boiling points.
— Examiner report, May/June 2025, 0653/43 Q6(b)(ii) (Cambridge)
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