plumiAlkenes: CAIE A‑Level Chemistry questions
Every CAIE A-Level Chemistry exam question on 14.2 Alkenes, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Q9(c)(i)
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Q9(c)(ii)
The whole paper ↗![June 2024 Paper 4, question 9(c)(ii): Another Diels–Alder reaction of buta-1,3-diene is shown in Fig. 9.5. Predict the product formed in this reaction. + Fig. 9.5 [1] [Total: 7]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970141-jun24-09-cii-qp.webp)
Q5(c)(ii)
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Q6(b)(i)
The whole paper ↗![June 2024 Paper 2, question 6(b)(i): Identify the role of reagent T for each functional group that reacts in reaction 1. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970121-jun24-06-bi-qp.webp)
Q2(b)(ii)
The whole paper ↗![Specimen Paper 2, question 2(b)(ii): C60H18 is an alkene. State a test to indicate the presence of double bonds between carbon atoms in alkene molecules. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970102-spec-02-bii-qp.webp)
Q2(b)(iii)
The whole paper ↗![Specimen Paper 2, question 2(b)(iii): State the observations seen when the test in (b)(ii) is carried out on an alkene. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970102-spec-02-biii-qp.webp)
Q2(c)(i)
The whole paper ↗![Specimen Paper 2, question 2(c)(i): Name the type of reaction that occurs. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970102-spec-02-ci-qp.webp)
Q4(d)
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All 14 questions on Alkenes, as a list
- June 2024, Paper 4, Q9(c)(i) (1 mark): Draw three curly arrows in Fig. 9.4 to complete the mechanism for the Diels–Alder reaction between buta-1,3-diene and ethene. buta-1,3-diene ethene cyclohexene
- June 2024, Paper 4, Q9(c)(ii) (1 mark): Another Diels–Alder reaction of buta-1,3-diene is shown in Fig. 9.5. Predict the product formed in this reaction. + Fig. 9.5 [1] [Total: 7]
- June 2024, Paper 1, Q25 (1 mark): Structural isomerism and stereoisomerism should be taken into account when answering this question. The structure of 3-methylcyclobutene is shown. 3-methylcyclo
- June 2024, Paper 1, Q29 (1 mark): A molecule of geraniol is shown. geraniol OH What is formed when geraniol is reacted with an excess of cold dilute acidified MnO4 –? A B O OH OH HO HO HO HO OH
- June 2024, Paper 1, Q31 (1 mark): 2-bromopropane is converted to 1,2-dibromopropane in a pathway involving two reactions. reaction 1 reaction 2 2-bromopropane compound X 1,2-dibromopropane What
- June 2024, Paper 1, Q33 (1 mark): Which reagents could be used to form 2-bromobutane from butan-1-ol? A bromine and ultraviolet light B concentrated sulfuric acid with potassium bromide, under r
- June 2024, Paper 2, Q5(c)(ii) (4 marks): Complete Fig. 5.1 to show the mechanism for the electrophilic addition of hydrogen bromide to 2-methylpropene to produce the major organic product. Include char
- June 2024, Paper 2, Q6(b)(i) (1 mark): Identify the role of reagent T for each functional group that reacts in reaction 1. [1]
- Specimen, Paper 1, Q27 (1 mark): An alkene is reacted with acidified manganate(VII) ions, MnO4 −. The organic product has a relative molecular mass greater than that of the alkene by 34. What c
- Specimen, Paper 1, Q35 (1 mark): Citral is found in lemongrass oil. It can react to give compound W. CHO an excess of hot, concentrated V W H2 / Ni acidified manganate(VII) under reflux citral
- Specimen, Paper 2, Q2(b)(ii) (1 mark): C60H18 is an alkene. State a test to indicate the presence of double bonds between carbon atoms in alkene molecules. [1]
- Specimen, Paper 2, Q2(b)(iii) (1 mark): State the observations seen when the test in (b)(ii) is carried out on an alkene. [1]
- Specimen, Paper 2, Q2(c)(i) (1 mark): Name the type of reaction that occurs. [1]
- Specimen, Paper 2, Q4(d) (2 marks): Hex-3-ene is an isomer of cyclohexane. Hex-3-ene can be converted into propanoic acid. reaction 3 hex-3-ene propanoic acid Deduce the reagents and conditions fo
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