plumiOrganic functional groups: OCR A‑Level Chemistry B questions
Every OCR A-Level Chemistry B exam question on DF Organic functional groups (specification points DF(l)–(m)), 2016–2025, with its mark scheme and examiner’s report.
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Calculations
![June 2025 AS Paper 1, question 9: How can benzene be described? A A cycloalkene B An alkane C An alkene D An arene Your answer [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun25-09-qp.webp?v=3)
Q23(a)
The whole paper ↗![June 2025 AS Paper 1, question 23(a): Give the systematic name of the hydrocarbon. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun25-23-a-qp.webp?v=3)
Q2(a)(i)
The whole paper ↗![June 2024 Paper 3, question 2(a)(i): What term is used to describe compounds with benzene rings? [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun24-02-ai-qp.webp?v=3)
Q3(g)(ii)
The whole paper ↗![June 2024 AS Paper 2, question 3(g)(ii): Name the molecule shown below. Name: [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03302-jun24-03-gii-qp.webp?v=3)
Q3(g)(iii)
The whole paper ↗![June 2024 AS Paper 2, question 3(g)(iii): Alkanes have no double bonds and no benzene rings. Give words that are used to describe these features of the alkanes. No double bonds No benzene rings [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03302-jun24-03-giii-qp.webp?v=3)
Q32(b)
The whole paper ↗![June 2023 Paper 1, question 32(b): 2,2,3-trimethylpentane is a structural isomer of octane. Draw the skeletal formula for 2,2,3-trimethylpentane. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun23-32-b-qp.webp?v=3)
![June 2022 AS Paper 1, question 4: Which compound is a saturated aliphatic hydrocarbon? A benzene B cyclohexane C cyclohexene D hexene Your answer [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun22-04-qp.webp?v=3)
Q21(a)(i)
The whole paper ↗![June 2022 AS Paper 1, question 21(a)(i): Give the systematic names for compound A and vinyl chloride. compound A vinyl chloride [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun22-21-ai-qp.webp?v=3)
Q3(c)(i)
The whole paper ↗![November 2020 Paper 3, question 3(c)(i): Write out the full structural formulae of the two compounds. propan-1-ol propan-2-ol [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-nov20-03-ci-qp.webp?v=3)
Q35(b)
The whole paper ↗![June 2019 Paper 1, question 35(b): They then decide that the molecules could be aromatic. What does aromatic mean? [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun19-35-b-qp.webp?v=3)
![June 2019 AS Paper 1, question 9: Which term correctly describes cyclohexane? A Arene B Alkene C Aliphatic D Unsaturated Your answer [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun19-09-qp.webp?v=3)
Q1(a)(ii)
The whole paper ↗![June 2019 AS Paper 2, question 1(a)(ii): 2,2,3-Trimethylheptane is an isomer of decane. Draw the skeletal formula of 2,2,3-trimethylheptane. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03302-jun19-01-aii-qp.webp?v=3)
![June 2018 AS Paper 1, question 2: Which of the following is a cyclic saturated aliphatic compound? A cyclohexene B cyclohexane C benzene D hexane Your answer [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun18-02-qp.webp?v=3)
Q23(a)
The whole paper ↗![June 2017 AS Paper 1, question 23(a): Complete the table above, filling the empty boxes. [3]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun17-23-a-qp.webp?v=3)
Q22(a)
The whole paper ↗![June 2016 AS Paper 1, question 22(a): Give the systematic name for isobutylene. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h03301-jun16-22-a-qp.webp?v=3)
All 20 questions on Organic functional groups, as a list
- June 2025, Paper 1, Q17 (1 mark): An organic compound is shown: OH What is the correct name for this compound? A 1,1,5-trimethylheptan-4-ol B 2-methyl-6-methyloctan-5-ol C 2-ethyl-6-methylheptan
- June 2025, AS Paper 1, Q9 (1 mark): How can benzene be described? A A cycloalkene B An alkane C An alkene D An arene Your answer [1]
- June 2025, AS Paper 1, Q20 (1 mark): A branched alkane has the formula: What is the systematic name of the alkane? A 2,4,4-trimethylhexane B 2,4-dimethyl-2-ethylpentane C 2-ethyl-2,4,4-trimethylbut
- June 2025, AS Paper 1, Q23(a) (1 mark): Give the systematic name of the hydrocarbon. [1]
- June 2024, Paper 3, Q2(a)(i) (1 mark): What term is used to describe compounds with benzene rings? [1]
- June 2024, AS Paper 2, Q3(g)(ii) (1 mark): Name the molecule shown below. Name: [1]
- June 2024, AS Paper 2, Q3(g)(iii) (1 mark): Alkanes have no double bonds and no benzene rings. Give words that are used to describe these features of the alkanes. No double bonds No benzene rings [1]
- June 2023, Paper 1, Q32(b) (1 mark): 2,2,3-trimethylpentane is a structural isomer of octane. Draw the skeletal formula for 2,2,3-trimethylpentane. [1]
- June 2022, AS Paper 1, Q4 (1 mark): Which compound is a saturated aliphatic hydrocarbon? A benzene B cyclohexane C cyclohexene D hexene Your answer [1]
- June 2022, AS Paper 1, Q21(a)(i) (2 marks): Give the systematic names for compound A and vinyl chloride. compound A vinyl chloride [2]
- November 2021, Paper 1, Q10 (1 mark): Organic compound Y can be described as aliphatic, cyclic and unsaturated. Which substance could be Y? A benzene B cyclohexane C cyclohexene D hexene Your answer
- November 2020, Paper 3, Q3(c)(i) (1 mark): Write out the full structural formulae of the two compounds. propan-1-ol propan-2-ol [1]
- June 2019, Paper 1, Q3 (1 mark): In which row of the table does the formula match the systematic name and the homologous series? Formula Systematic name Homologous series A C6H12 cyclohexane cy
- June 2019, Paper 1, Q35(b) (1 mark): They then decide that the molecules could be aromatic. What does aromatic mean? [1]
- June 2019, AS Paper 1, Q9 (1 mark): Which term correctly describes cyclohexane? A Arene B Alkene C Aliphatic D Unsaturated Your answer [1]
- June 2019, AS Paper 1, Q17 (1 mark): Which substance will not give 3-methylpentane when reduced with hydrogen? A 2-ethylbut-1-ene B 3-methylpent-2-ene C 2-methylpent-1-ene D 3-methylpent-1-ene Your
- June 2019, AS Paper 2, Q1(a)(ii) (1 mark): 2,2,3-Trimethylheptane is an isomer of decane. Draw the skeletal formula of 2,2,3-trimethylheptane. [1]
- June 2018, AS Paper 1, Q2 (1 mark): Which of the following is a cyclic saturated aliphatic compound? A cyclohexene B cyclohexane C benzene D hexane Your answer [1]
- June 2017, AS Paper 1, Q23(a) (3 marks): Complete the table above, filling the empty boxes. [3]
- June 2016, AS Paper 1, Q22(a) (1 mark): Give the systematic name for isobutylene. [1]
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