plumiBenzene structure and naming aromatics: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 6.1.1.1 Benzene structure and naming aromatics, 2016–2025, with mark schemes and examiner’s reports where available.
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Q20(a)
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Open the full PDFYour answerQ19(a)(i)
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All 10 questions on Benzene structure and naming aromatics, as a list
- June 2025, Paper 2, Q20(a) (2 marks): The diagrams show the Kekulé and delocalised models of benzene. Kekulé Delocalised One piece of evidence for the delocalised model is that benzene does not deco
- June 2024, Paper 2, Q16(d) (1 mark): What is the systematic name of hydrocarbon C? [1]
- June 2024, Paper 3, Q4(c)(iii) (1 mark): Suggest one example of evidence that could show that P3N3Cl 6 has a Kekulé structure rather than a delocalised structure. [1]
- June 2023, Paper 2, Q6 (1 mark): Which statement supports the delocalised model of benzene and not the Kekulé model? A Sigma bonds overlap to form a π-system. B The carbon-carbon bond lengths a
- June 2022, Paper 2, Q3 (1 mark): What is the number of sigma bonds in a molecule of methylbenzene? A 7 B 10 C 12 D 15 Your answer [1]
- November 2021, Paper 2, Q14 (1 mark): Which of the following statement(s) provide(s) evidence for the delocalised model of benzene rather than the Kekulé model? 1 The enthalpy change of hydrogenatio
- June 2019, Paper 2, Q19(a)(i) (3 marks): Describe, in terms of orbital overlap, the similarities and differences between the bonding in the Kekulé model and the delocalised model of benzene. [3]
- June 2019, Paper 2, Q19(a)(ii) (2 marks): Experimental evidence led to the general acceptance of the delocalised model over the Kekulé model. Describe two pieces of evidence to support the delocalised m
- June 2019, Paper 3, Q4(a)(i) (1 mark): What is the systematic name of chloroxylenol? [1]
- June 2018, Paper 2, Q13 (1 mark): Which statement(s) support(s) the delocalised model for the structure of benzene? 1 All carbon–carbon bonds have the same length. 2 The enthalpy change of hydro
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