plumiElimination: AQA A‑Level Chemistry questions
AQA A-Level Chemistry past-paper questions on 3.3.3.2 Elimination, 2008–2025, with mark schemes and examiner’s reports where available.
Paper
All papers
Exam
All years
Calculations
Q01.4
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ01.6
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFLoading the question…
Open the full PDFQ01.3
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ01.4
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFLoading the question…
Open the full PDFLoading the question…
Open the full PDFQ03.1
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ03.4
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFLoading the question…
Open the full PDFLoading the question…
Open the full PDFLoading the question…
Open the full PDFQ06.4
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ01.5
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ01.6
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ06.3
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDF
All 38 questions on Elimination, as a list
- June 2025, Paper 2, Q01.4 (2 marks): Give a suitable reagent and conditions needed for reaction 2. [2 marks] Reagent Conditions
- June 2025, Paper 2, Q01.6 (1 mark): Use of the reagent for reaction 2 followed by the reagent for reaction 3 gives another organic product. Give the structure of the other organic product. [1 mark
- June 2025, Paper 3, Q08 (1 mark): Each of the conversions shown uses KOH as a reactant. In which conversion does KOH not act as a base? [1 mark] A (CH3)2NH2+Br – to (CH3)2NH B CH3COOH to CH3COO–
- June 2025, Paper 3, Q10 (1 mark): Which diagram shows a correct step in the mechanism for an elimination reaction of bromoethane? [1 mark] A B C D
- June 2025, AS Paper 2, Q01.3 (1 mark): Identify the solvent that should be used to ensure that butan-2-ol is the main organic product when 2-brombutane reacts with KOH [1 mark]
- June 2025, AS Paper 2, Q01.4 (5 marks): Under different conditions, 2-bromobutane reacts with KOH to form but-1-ene and two other alkenes. Name and complete the mechanism to form but-1-ene from 2-brom
- June 2024, AS Paper 2, Q12 (1 mark): A halogenoalkane reacts with ethanolic potassium hydroxide to form these alkenes by elimination: • 2-ethylpent-1-ene • E-3-methylhex-2-ene • Z-3-methylhex-2-ene
- June 2023, Paper 3, Q29 (1 mark): Which is not a possible product of a reaction between KOH and ? [1 mark] A B C D
- June 2023, AS Paper 2, Q13 (1 mark): Which is not a possible product of the reaction of this compound with potassium hydroxide? [1 mark] A B C D
- June 2022, Paper 3, Q03.1 (2 marks): Give the names of the two concurrent mechanisms responsible for the formation of the alkenes and the alcohols. [2 marks] Mechanism to form alkenes Mechanism to
- June 2022, Paper 3, Q03.4 (3 marks): Outline the mechanism for the reaction of 2-bromobutane with sodium hydroxide to form alkene A. [3 marks]
- June 2022, AS Paper 2, Q21 (1 mark): Which of these compounds is not produced? [1 mark] A butan-1-ol B butan-2-ol C but-1-ene D E-but-2-ene
- June 2022, AS Paper 2, Q22 (1 mark): What is the role of the hydroxide ions in the elimination reaction? [1 mark] A base B catalyst C electrophile D nucleophile
- November 2021, AS Paper 2, Q13 (1 mark): Which compound is not formed by reacting 3-bromo-3-methylhexane with warm, ethanolic potassium hydroxide? [1 mark] A 2-ethylpent-1-ene B 3-methylhex-1-ene C 3-m
- June 2019, AS Paper 2, Q22 (1 mark): Which compound could not be produced by reacting 2-bromo-3-methylbutane with sodium hydroxide? [1 mark] A 2-methylbut-1-ene B 3-methylbut-1-ene C 2-methylbut-2-
- June 2018, AS Paper 2, Q06.4 (6 marks): Reaction of A with hot, ethanolic potassium hydroxide gives alkene C. Name the mechanism for this reaction. State the role of the hydroxide ions. Outline the me
- June 2017, Paper 2, Q01.5 (1 mark): Identify the reagent and conditions used in Reaction 3. [1 mark
- June 2017, Paper 2, Q01.6 (4 marks): Name and outline a mechanism for Reaction 3. [4 marks Name of mechanism Mechanism
- June 2017, AS Paper 2, Q06.3 (2 marks): When 1-bromo-2-methylpropane reacts with hot, concentrated ethanolic potassium hydroxide rather than dilute aqueous sodium hydroxide, a different product is for
- June 2016, AS Paper 2, Q13 (1 mark): Which of the following is a correct mechanism for the formation of 2-methylbut-2-ene from 2-bromo-3-methylbutane? [1 mark] A B C D
- June 2016, CHEM2 (old spec), Q8(a) (8 marks): The same reagent is used in both reactions. The product is determined by the choice of conditions. State the reagent and the conditions for each of reaction 1 a
- June 2015, CHEM2 (old spec), Q8(d) (3 marks): State the type of reaction shown by Reaction 3. Identify a reagent for this reaction. Give one condition necessary for a high yield of product when Q is convert
- June 2014, CHEM2 (old spec), Q7(f) (5 marks): Name and outline a mechanism for the following reaction to form Isomer 5. State the role of the hydroxide ion in this reaction. [5 marks] (CH3)2CBrCH2CH3 + KOH
- June 2013, CHEM2 (old spec), Q5(a)(i) (4 marks): Name and outline a mechanism for the conversion of 2-bromo-3-methylbutane into 2-methylbut-2-ene according to the equation. (CH3)2CHCHBrCH3 + KOH (CH3)2C CHCH3
- June 2013, CHEM2 (old spec), Q5(a)(ii) (1 mark): Draw the displayed formula for the other isomer that is formed. (1 mark)
- June 2013, CHEM2 (old spec), Q5(b)(ii) (1 mark): Suggest one change to the reaction conditions that would increase the yield of X. (1 mark)
- January 2013, CHEM2 (old spec), Q8(d) (3 marks): The haloalkane produced in Reaction 1 can be converted back into propene in an elimination reaction using ethanolic potassium hydroxide. KOH CH3CHBrCH3 H2C CHCH
- June 2012, CHEM2 (old spec), Q7(a)(i) (3 marks): Complete the elimination mechanism by drawing appropriate curly arrows. HO H H H CH3 C C C CH2CH3 CH3CH2CH CHCH2CH3 + H2O + Br H H Br 3-bromohexane hex-3-ene (3
- January 2012, CHEM2 (old spec), Q8(c) (3 marks): The second stage is to convert 2-bromobutane into but-2-ene. CH3CH2CHBrCH3 + KOH CH3CH CHCH3 + KBr + H2O Outline a mechanism for this reaction. (3 marks) Sectio
- June 2011, CHEM2 (old spec), Q9(a)(i) (4 marks): Name and outline a mechanism for the conversion of 2-bromopentane into pent-2-ene as shown below. ethanolic KOH CH3CH2CH2CHBrCH3 CH3CH2CH CHCH3 (4 marks)
- June 2011, CHEM2 (old spec), Q9(a)(ii) (1 mark): Draw the structure of the other structurally isomeric alkene produced when 2-bromopentane reacts with ethanolic KOH. (1 mark)
- January 2011, CHEM2 (old spec), Q8(c)(i) (3 marks): Outline a mechanism for the elimination reaction in which 2-bromopropane reacts with potassium hydroxide to form propene. (3 marks)
- June 2010, CHEM4 (old spec), Q3(a)(ii) (1 mark): Name the type of mechanism in Reaction 1. (1 mark)
- January 2010, CHEM2 (old spec), Q7(b) (4 marks): An alternative reaction can occur between this haloalkane and potassium hydroxide as shown by the following equation. Name and outline a mechanism for this reac
- January 2010, CHEM2 (old spec), Q7(c) (1 mark): Give one condition needed to favour the reaction shown in part (b) rather than that shown in part (a). (1 mark)
- June 2009, CHEM2 (old spec), Q8(d) (4 marks): 8 (d) When potassium hydroxide reacts with bromoethane, ethene can also be formed. Name and outline a mechanism for this reaction. Name of mechanism Mechanism (
- June 2008, CHM3W (2008 spec), Q5(b) (4 marks): 5 (b) Name and outline a mechanism for the conversion of P into Q. Name of mechanism Mechanism (4 marks)
- January 2008, CHM3W (2008 spec), Q6(b) (4 marks): (b) Name and outline a mechanism for the conversion of A into B (Reaction 1). (4 marks)
Questions, mark schemes and examiner’s reports are © AQA, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? AQA A-Level Chemistry past papers.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.