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Halogen molecules and boiling points: OCR A‑Level Chemistry A questions

OCR A-Level Chemistry A past-paper questions on 3.1.3.1 Halogen molecules and boiling points, 2016–2025, with mark schemes and examiner’s reports where available.

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  1. Q5

    June 2024 · Paper 1

    1 mark3.1.3.1 Halogen molecules and boiling points
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  2. Q1

    June 2023 · AS Paper 1

    1 mark3.1.3.1 Halogen molecules and boiling points
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  3. Q10

    June 2022 · AS Paper 1

    1 mark3.1.3.1 Halogen molecules and boiling points
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  4. Q13

    November 2021 · Paper 1

    1 mark3.1.3.1 Halogen molecules and boiling points
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  5. Q23(a)

    June 2019 · AS Paper 1

    3 marks3.1.3.1 Halogen molecules and boiling points
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    The start of question 23

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  6. Q20(a)

    June 2018 · Paper 1

    3 marks3.1.3.1 Halogen molecules and boiling points
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    The start of question 20

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  7. Q9

    June 2017 · AS Paper 1

    1 mark3.1.3.1 Halogen molecules and boiling points
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All 7 questions on Halogen molecules and boiling points, as a list
  1. June 2024, Paper 1, Q5 (1 mark): Which statement explains the trend in boiling points down the halogens group? A The bond enthalpy of the covalent bonds increases. B The halogens become less el
  2. June 2023, AS Paper 1, Q1 (1 mark): Which statement explains the trend in boiling points down the halogens group? A Covalent bonds become stronger. B Induced dipole–dipole interactions (London for
  3. June 2022, AS Paper 1, Q10 (1 mark): What is the correct explanation for the trend in the boiling points of chlorine, bromine, and iodine down the group? A Bond enthalpy increases. B Chemical react
  4. November 2021, Paper 1, Q13 (1 mark): Which statement(s) explain(s) the trend in boiling points down the halogens group? 1: The induced dipole–dipole interactions (London forces) become stronger. 2:
  5. June 2019, AS Paper 1, Q23(a) (3 marks): The boiling points of the halogens are shown in the table. Boiling point Halogen / K fluorine 85 chlorine 239 bromine 332 iodine 457 astatine 503 Explain the tr
  6. June 2018, Paper 1, Q20(a) (3 marks): The halogens show trends in their properties down the group. The boiling points of three halogens are shown below. Halogen Boiling point / °C Chlorine –35 Bromi
  7. June 2017, AS Paper 1, Q9 (1 mark): What is the best explanation for the trend in boiling points down the halogens group? A The covalent bonds become stronger. B The hydrogen bonds become stronger

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