Skip to content
Try on iPad

Halogenoalkanes: Eduqas A‑Level Chemistry questions

Every Eduqas A-Level Chemistry exam question on C3.3 Halogenoalkanes, 2016–2025, with its mark scheme and examiner’s report.

Find questions1,513
Calculations

1,513 questions

  1. Q1(a)(i)

    June 2025 · Component 3

    1 markC3.3 Halogenoalkanes
    The whole paper ↗
    June 2025 Component 3, question 1(a)(i): Record the colours of the precipitates formed in the table below. [1] Time taken to form Halogenoalkane Colour of precipitate precipitate / s 1-chlorobutane 60

  2. Q1(a)(ii)

    June 2025 · Component 3

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2025 Component 3, question 1(a)(ii): I. Name the type of reaction mechanism for the hydrolysis of these halogenoalkanes. [1] II. Explain the trend in the rate of the reaction. [1]

  3. Q2(e)

    June 2025 · Component 3

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2025 Component 3, question 2(e): Describe how the student could have checked that all the bromide ions had been precipitated as silver bromide. [2]

  4. Q7(a)(i)

    June 2025 · AS Component 2

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2025 AS Component 2, question 7(a)(i): Suggest an improvement to the method that does not require the use of an additional reagent. Give a reason for your suggestion. [2]

  5. Q7(a)(ii)

    June 2025 · AS Component 2

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2025 AS Component 2, question 7(a)(ii): Another student thought that the precipitate was white and that the halogen present in the sample was therefore chlorine. Give a further test that the student c

  6. Q7(c)

    June 2025 · AS Component 2

    3 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2025 AS Component 2, question 7(c): Despite a total ban on CFCs coming into effect in 2014, many companies are still in the process of replacing their cooling systems. Consequently, there are plen

  7. Q7(e)(iii)

    June 2024 · Component 2

    5 marksC3.2 HydrocarbonsC3.3 Halogenoalkanes
    The whole paper ↗
    June 2024 Component 2, question 7(e)(iii): One method to prepare malic acid from maleic acid is shown in the reaction sequence below. COO–Na+ H COOH H COOH H H COOH excess C HBr C H NaOH(aq) C H HCI(aq)

  8. Q8(b)

    June 2024 · Component 2

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2024 Component 2, question 8(b): Give reagent(s) that can be used to convert (1-bromoethyl)benzene, C6H5CHBrCH3, into phenylethene, C6H5CH CH2 State why this is classed as an elimination reacti

  9. Q9(a)

    June 2024 · Component 2

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2024 Component 2, question 9(a): Octane has a boiling temperature of 125 °C. It can be made by reacting 1-bromobutane or 1-iodobutane with sodium. The equation shows the reaction of 1-bromobuta

  10. Q10(b)(i)

    June 2024 · Component 2

    3 marksC3.3 HalogenoalkanesOA3.1 Amines
    The whole paper ↗
    June 2024 Component 2, question 10(b)(i): The flow chart shows a method for producing 1,6-diaminohexane from 1,4-dichlorobutane. stage 1 CI H2C(CH2)2CH2 CI N C H2C(CH2)2CH2 C N KCN stage 2 H2N CH2 CH2(C

  11. Q8(a)(i)

    June 2024 · AS Component 2

    1 markC3.3 Halogenoalkanes
    The whole paper ↗
    June 2024 AS Component 2, question 8(a)(i): Classify the type of reaction mechanism taking place when compound B is converted to compound C. [1]

  12. Q9(b)(i)

    Autumn 2021 · Component 2

    1 markC3.3 Halogenoalkanes
    The whole paper ↗
    Autumn 2021 Component 2, question 9(b)(i): State the name of the reagent that will convert 2-bromo-1,3-diphenylpropane into 1,3-diphenylpropene. [1] H H H H H H C C C C C C H Br H H 2-bromo-1,3-diphenyl

  13. Q11(c)

    Autumn 2021 · Component 2

    3 marksC3.3 Halogenoalkanes
    The whole paper ↗
    Autumn 2021 Component 2, question 11(c): 1,4-Di(chloromethyl)benzene reacts with aqueous sodium hydroxide giving the corresponding primary alcohol, 1,4-di(hydroxymethyl)benzene. ClH2C CH2Cl + 2NaOH HOH

  14. Q5(a)

    Autumn 2020 · Component 2

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    Autumn 2020 Component 2, question 5(a): Complete the mechanism for the reaction below by adding suitable curly arrows and partial/full charges. You do not need to show lone pairs of electrons. [2] H H

  15. Q9(e)(ii)

    Autumn 2020 · Component 2

    1 markC3.3 Halogenoalkanes
    The whole paper ↗
    Autumn 2020 Component 2, question 9(e)(ii): State a reagent that will react with 1,6-dichlorohexane to give hexane-1,6-diol in stage 1 [1]

  16. Q8(a)(i)

    Autumn 2020 · AS Component 2

    1 markC3.3 Halogenoalkanes
    The whole paper ↗
    Autumn 2020 AS Component 2, question 8(a)(i): Suggest how the student could separate the halogenoalkane from the other compounds. [1]

  17. Q8(a)(ii)

    Autumn 2020 · AS Component 2

    5 marksC3.3 Halogenoalkanes
    The whole paper ↗
    Autumn 2020 AS Component 2, question 8(a)(ii): The student wants to purify the halogenoalkane by distillation. He sets up the apparatus as shown in the diagram. You may assume that all the equipment is suita

  18. Q8(b)

    June 2019 · Component 2

    2 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2019 Component 2, question 8(b): Halogenated alkanes cause environmental problems in the ozone layer by their interaction with UV radiation. Complete the equation below, which shows the effect

  19. Q9(b)

    June 2019 · Component 2

    4 marksC3.3 HalogenoalkanesC1.3 Chemical calculations
    The whole paper ↗
    June 2019 Component 2, question 9(b): Compound L is an aromatic compound of formula C8H8Br2 (Mr 264). A sample of compound L of mass 3.22 g was refluxed with excess aqueous sodium hydroxide and the

  20. Q8(a)

    June 2019 · AS Component 2

    6 marksC3.3 Halogenoalkanes
    The whole paper ↗
    June 2019 AS Component 2, question 8(a): Discuss how 1-bromobutane can react with hydroxide ions under different conditions to give two different organic products. Draw the mechanism for the formation
All 37 questions on Halogenoalkanes, as a list
  1. June 2025, Component 3, Q1(a)(i) (1 mark): Record the colours of the precipitates formed in the table below. [1] Time taken to form Halogenoalkane Colour of precipitate precipitate / s 1-chlorobutane 60
  2. June 2025, Component 3, Q1(a)(ii) (2 marks): I. Name the type of reaction mechanism for the hydrolysis of these halogenoalkanes. [1] II. Explain the trend in the rate of the reaction. [1]
  3. June 2025, Component 3, Q2(e) (2 marks): Describe how the student could have checked that all the bromide ions had been precipitated as silver bromide. [2]
  4. June 2025, AS Component 2, Q7(a)(i) (2 marks): Suggest an improvement to the method that does not require the use of an additional reagent. Give a reason for your suggestion. [2]
  5. June 2025, AS Component 2, Q7(a)(ii) (2 marks): Another student thought that the precipitate was white and that the halogen present in the sample was therefore chlorine. Give a further test that the student c
  6. June 2025, AS Component 2, Q7(c) (3 marks): Despite a total ban on CFCs coming into effect in 2014, many companies are still in the process of replacing their cooling systems. Consequently, there are plen
  7. June 2024, Component 2, Q7(e)(iii) (5 marks): One method to prepare malic acid from maleic acid is shown in the reaction sequence below. COO–Na+ H COOH H COOH H H COOH excess C HBr C H NaOH(aq) C H HCI(aq)
  8. June 2024, Component 2, Q8(b) (2 marks): Give reagent(s) that can be used to convert (1-bromoethyl)benzene, C6H5CHBrCH3, into phenylethene, C6H5CH CH2 State why this is classed as an elimination reacti
  9. June 2024, Component 2, Q9(a) (2 marks): Octane has a boiling temperature of 125 °C. It can be made by reacting 1-bromobutane or 1-iodobutane with sodium. The equation shows the reaction of 1-bromobuta
  10. June 2024, Component 2, Q10(b)(i) (3 marks): The flow chart shows a method for producing 1,6-diaminohexane from 1,4-dichlorobutane. stage 1 CI H2C(CH2)2CH2 CI N C H2C(CH2)2CH2 C N KCN stage 2 H2N CH2 CH2(C
  11. June 2024, AS Component 2, Q8(a)(i) (1 mark): Classify the type of reaction mechanism taking place when compound B is converted to compound C. [1]
  12. Autumn 2021, Component 2, Q9(b)(i) (1 mark): State the name of the reagent that will convert 2-bromo-1,3-diphenylpropane into 1,3-diphenylpropene. [1] H H H H H H C C C C C C H Br H H 2-bromo-1,3-diphenyl
  13. Autumn 2021, Component 2, Q11(c) (3 marks): 1,4-Di(chloromethyl)benzene reacts with aqueous sodium hydroxide giving the corresponding primary alcohol, 1,4-di(hydroxymethyl)benzene. ClH2C CH2Cl + 2NaOH HOH
  14. Autumn 2020, Component 2, Q5(a) (2 marks): Complete the mechanism for the reaction below by adding suitable curly arrows and partial/full charges. You do not need to show lone pairs of electrons. [2] H H
  15. Autumn 2020, Component 2, Q9(e)(ii) (1 mark): State a reagent that will react with 1,6-dichlorohexane to give hexane-1,6-diol in stage 1 [1]
  16. Autumn 2020, AS Component 2, Q8(a)(i) (1 mark): Suggest how the student could separate the halogenoalkane from the other compounds. [1]
  17. Autumn 2020, AS Component 2, Q8(a)(ii) (5 marks): The student wants to purify the halogenoalkane by distillation. He sets up the apparatus as shown in the diagram. You may assume that all the equipment is suita
  18. June 2019, Component 2, Q8(b) (2 marks): Halogenated alkanes cause environmental problems in the ozone layer by their interaction with UV radiation. Complete the equation below, which shows the effect
  19. June 2019, Component 2, Q9(b) (4 marks): Compound L is an aromatic compound of formula C8H8Br2 (Mr 264). A sample of compound L of mass 3.22 g was refluxed with excess aqueous sodium hydroxide and the
  20. June 2019, AS Component 2, Q8(a) (6 marks): Discuss how 1-bromobutane can react with hydroxide ions under different conditions to give two different organic products. Draw the mechanism for the formation
  21. June 2019, AS Component 2, Q8(d) (2 marks): Halogenoalkanes containing both chlorine and fluorine are known as CFCs. One of the most abundant CFCs in the atmosphere is trichlorofluoromethane, CCl3F. Expla
  22. June 2018, Component 2, Q12(c)(i) (1 mark): 3-Chloropropene can be converted to prop-2-en-1-ol by reaction with sodium hydroxide in a nucleophilic substitution reaction. CH2 CHCH2CI + NaOH CH2 CHCH2OH + N
  23. June 2018, Component 2, Q13(d)(ii) (2 marks): The bromo-compound reacts with ammonia to produce 11-aminoundecanoic acid. One step in the mechanism for this reaction is shown below. H H H H δ– + :Br– Br C C
  24. June 2018, Component 2, Q15(a)(i) (4 marks): Describe how to show the presence of chlorine in this compound. [4]
  25. June 2018, AS Component 2, Q8(a)(ii) (7 marks): Identify compounds A-E giving your reasoning. [7]
  26. June 2018, AS Component 2, Q8(a)(iii) (1 mark): Name the type of reaction taking place when compound B is converted back to compound A. [1]
  27. June 2017, Component 2, Q12(a)(i) (4 marks): The presence of a C–Cl bond in this compound can be shown by a simple test tube reaction. Outline the practical steps that are used in this method. You can assu
  28. June 2017, Component 2, Q12(c) (6 marks): Over the last thirty years the production and use of CFCs has declined mainly because of their adverse environmental effects. Using fluorotrichloromethane as yo
  29. June 2017, AS Component 2, Q7(d)(i) (1 mark): Classify the type of reaction mechanism taking place when propan-1-ol is formed from 1-bromopropane. [1]
  30. June 2017, AS Component 2, Q7(d)(ii) (1 mark): Give the reagent(s) and conditions necessary to convert 1-bromopropane to propene. [1]
  31. June 2017, AS Component 2, Q7(f)(ii) (1 mark): Give a reason why chlorine radicals form but fluorine radicals do not. [1]
  32. June 2016, AS Component 2, Q6(b)(i) (4 marks): Classify the type of reaction mechanism occurring and draw the mechanism for this reaction. [4] Type of reaction mechanism
  33. June 2016, AS Component 2, Q6(b)(iii) (1 mark): 1-lodobutane also reacts with aqueous sodium hydroxide to form butan-1-ol. State, giving a reason, if this reaction is faster or slower than the one between 1-c
  34. June 2016, AS Component 2, Q7(b) (3 marks): A compound is known to be either 1-chlorobutane or 1-iodobutane. Describe a test to show that the compound is 1-chlorobutane. Give any reagent(s) used and expec
  35. June 2016, AS Component 2, Q7(c)(i) (1 mark): Draw the displayed formula of the organic product of this reaction. [1]
  36. June 2016, AS Component 2, Q7(c)(ii) (1 mark): State the conditions required for this reaction. [1]
  37. June 2016, AS Component 2, Q7(e) (2 marks): CFCs have been shown to be serious pollutants due to their contribution to ozone depletion. Chemists are now replacing them with HFCs. Suggest two properties wh

Questions, mark schemes and examiner’s reports are © WJEC Eduqas, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every Eduqas A-Level Chemistry paper.

Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.