plumiHydrolysis of haloalkanes and nucleophiles: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 4.2.2.1 Hydrolysis of haloalkanes and nucleophiles, 2016–2025, with mark schemes and examiner’s reports where available.
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Q5(a)(iii)
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Open the full PDFYour answerQ19(c)(ii)
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All 18 questions on Hydrolysis of haloalkanes and nucleophiles, as a list
- June 2025, Paper 3, Q5(a)(iii) (1 mark): In the preparation, LiAl H4 behaves as a nucleophile. What is meant by the term nucleophile? [1]
- June 2024, Paper 2, Q3 (1 mark): A student investigates the rate of hydrolysis of different iodoalkanes using aqueous silver nitrate in ethanol. What colour of precipitate is seen? A Brown B Cr
- June 2024, Paper 2, Q18(b) (9 marks): Complete the flowchart by filling in each box. amine reagent(s) reagent(s) H H3C C Br H bromoethane alcohol reagent(s) H H3C C C N H nitrile reagent(s) reagent(
- June 2024, Paper 3, Q5(a)(ii) (1 mark): Write an equation for the alkaline hydrolysis of 1-bromopropane. Show structures of organic compounds. [1]
- June 2024, AS Paper 1, Q25(d)(i) (2 marks): Write an equation for the hydrolysis of 2‑bromo‑2‑methylpropane. Show organic compounds as structures. [2]
- June 2023, AS Paper 2, Q3(d)(i) (2 marks): Complete the table below to show the formula and colour of each precipitate formed. Haloalkane Formula of precipitate Colour of precipitate 2-bromopropane 2-iod
- June 2022, Paper 2, Q14 (1 mark): Which species could react as a nucleophile? 1 NH3 OH– 2 3 CH3NH2 A 1, 2 and 3 B Only 1 and 2 C Only 2 and 3 D Only 1 Your answer [1]
- November 2021, Paper 2, Q15 (1 mark): Compounds 1, 2 and 3 are heated with NaOH(aq). Which compound(s) react(s)? OH 1 COOH 2 CH2Br 3 A 1, 2 and 3 B Only 1 and 2 C Only 2 and 3 D Only 1 Your answer [
- November 2021, AS Paper 1, Q24(c)(i) (2 marks): Choose a reagent for this reaction and complete the equation for this reaction. Your equation should show the structure of alcohol C. CH3 H H3C C C H + + Reagen
- November 2020, Paper 2, Q14 (1 mark): Which of the following reactions produce propan-1-ol? 1 The alkaline hydrolysis of 1-chloropropane. 2 The acid hydrolysis of propyl methanoate. 3 The acid hydro
- November 2020, AS Paper 1, Q19 (1 mark): Which row describes a nucleophile? A electron pair donor attracted to high electron density B electron pair donor attracted to low electron density C electron p
- June 2019, Paper 2, Q6 (1 mark): What is the organic product of the reaction below? CH2Cl KOH(aq) Cl CH2OH A Cl CH2Cl B OH CH2OH C OH HO CH2Cl D Cl Your answer [1]
- June 2019, Paper 2, Q18(a)(ii) (5 marks): In the boxes, draw the organic products for the reactions of the functional groups in ester A shown below. Each reaction forms two organic products. + H+(aq) O
- June 2019, Paper 2, Q20(b)(ii) (1 mark): What is the role of OH− in this mechanism? [1]
- June 2019, AS Paper 2, Q3(a)(ii) (1 mark): 1-Iodopentane can also be hydrolysed by water using aqueous silver nitrate, with ethanol as the solvent. A student uses this method to compare the rates of hydr
- June 2018, Paper 2, Q3 (1 mark): Which compound does not react with nucleophiles? A CH3CH2CHO B CH3CHCH2 C CH3CH2COCH3 D CH3CH2CH2Cl Your answer [1]
- June 2018, Paper 2, Q19(c)(ii) (3 marks): Analyse the information to identify E, F and G. Show your working. [3]
- June 2017, Paper 2, Q1 (1 mark): A chemist compares the rates of hydrolysis of 1-chloropropane and 1-bromopropane in ethanol. Which reagent in aqueous solution should be used? A Silver chloride
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