plumiGroup 7 (halogens) – chlorine, bromine and iodine: Edexcel International GCSE Chemistry questions
Every Edexcel International GCSE Chemistry exam question on Group 7 (halogens) – chlorine, bromine and iodine (specification points 2.5–2.8), 2019–2025, with its mark scheme and examiner’s report.
Paper
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Calculations
Q5(a)
The whole paper ↗Q5(b)(i)
The whole paper ↗Q5(b)(ii)
The whole paper ↗Q5(b)(iii)
The whole paper ↗Q1(c)
The whole paper ↗Q1(d)
The whole paper ↗Q7(d)
The whole paper ↗Q2(a)
The whole paper ↗Q2(c)
The whole paper ↗Q6(a)(i)
The whole paper ↗Q6(a)(ii)
The whole paper ↗Q6(c)
The whole paper ↗Q3(a)
The whole paper ↗Q3(b)
The whole paper ↗Q3(c)
The whole paper ↗Q3(d)(i)
The whole paper ↗Q2(a)(i)
The whole paper ↗Q2(b)(i)
The whole paper ↗Q2(b)(ii)
The whole paper ↗Q8(a)
The whole paper ↗
All 47 questions on Group 7 (halogens) – chlorine, bromine and iodine, as a list
- June 2025 (R), Paper 1, Q5(a) (3 marks): Complete the table by giving the missing information. (3) Physical state at room Element Colour temperature fluorine pale yellow gas chlorine pale green bromine
- June 2025 (R), Paper 1, Q5(b)(i) (2 marks): When chlorine is added to sodium bromide solution, chlorine displaces bromine. Give a chemical equation for this reaction. (2)
- June 2025 (R), Paper 1, Q5(b)(ii) (2 marks): Explain whether a reaction takes place when bromine water is added to sodium chloride solution. (2)
- June 2025 (R), Paper 1, Q5(b)(iii) (2 marks): The displacement reaction between potassium astatide and bromine can be represented by this ionic equation. 2At− + Br2 → At2 + 2Br− Explain why this is describe
- November 2023, Paper 2, Q1(c) (1 mark): Which of these describes the element iodine at room temperature? (1) A brown liquid B brown solid C grey solid D purple gas
- November 2023, Paper 2, Q1(d) (3 marks): When a halogen is added to a solution containing halide ions, a displacement reaction may occur. The table shows whether a reaction occurs. Chloride ion Bromide
- June 2023, Paper 1, Q7(d) (6 marks): A student mixes the following pairs of solutions. Pair 1 bromine solution and potassium chloride solution Pair 2 bromine solution and potassium iodide solution
- June 2023 (R), Paper 2, Q2(a) (2 marks): Complete the table by giving the missing information. (2)
- June 2023 (R), Paper 2, Q2(c) (3 marks): A student is given an aqueous solution of chlorine and an aqueous solution of sodium iodide. The student mixes the two solutions. Explain the colour change that
- January 2023 (R), Paper 1, Q6(a)(i) (1 mark): Which element is a liquid at room temperature? (1) A astatine B bromine C chlorine D fluorine
- January 2023 (R), Paper 1, Q6(a)(ii) (1 mark): What colour is solid iodine? (1) A black B dark brown C dark grey D purple
- January 2023 (R), Paper 1, Q6(c) (4 marks): A student is given an aqueous solution of chlorine and an aqueous solution of sodium iodide. Explain how the student can use these solutions to compare the reac
- June 2022, Paper 2, Q3(a) (1 mark): Which halogen has the palest colour? (1) A astatine B bromine C fluorine D iodine
- June 2022, Paper 2, Q3(b) (1 mark): Which halogen is a solid at room temperature? (1) A astatine B bromine C chlorine D fluorine
- June 2022, Paper 2, Q3(c) (4 marks): The table shows the electronic configurations of a fluorine atom and a chlorine atom. Electronic configuration fluorine 2.7 chlorine 2.8.7 Explain the relative
- June 2022, Paper 2, Q3(d)(i) (1 mark): Write a chemical equation for the reaction of lithium with chlorine. (1)
- November 2021, Paper 1, Q2(a)(i) (1 mark): State why fluorine has the smallest atoms in Group 7. (1)
- November 2021, Paper 1, Q2(b)(i) (2 marks): The table gives descriptions of the reactions of some Group 7 elements with iron wool. Complete the table by giving a description of the reaction of fluorine wi
- November 2021, Paper 1, Q2(b)(ii) (2 marks): State the relationship between the reactivity of the Group 7 elements and the size of their atoms. (2)
- January 2021, Paper 1, Q8(a) (2 marks): The table gives some information about the halogens. Complete the table by predicting the physical state of astatine at room temperature and the colour of astat
- January 2021, Paper 1, Q8(c)(i) (3 marks): Explain how these results show the order of reactivity of bromine, chlorine and iodine. (3)
- January 2021, Paper 1, Q8(c)(ii) (1 mark): Suggest why the student does not need to add bromine solution to sodium bromide solution. (1)
- January 2021, Paper 1, Q8(c)(iii) (2 marks): The ionic equation for the reaction between bromine and sodium iodide is Br2(aq) + 2I−(aq) → I2(aq) + 2Br−(aq) Explain why this is a redox reaction. (2)
- January 2021 (R), Paper 2, Q2(a)(i) (1 mark): Predict the colour of fluorine at room temperature. (1)
- January 2021 (R), Paper 2, Q2(a)(ii) (1 mark): How many of the elements in the table are liquids at room temperature (20 °C)? (1) A 0 B 1 C 2 D 3
- January 2021 (R), Paper 2, Q2(a)(iii) (1 mark): The element astatine is below iodine in Group 7. Predict the formula of a molecule of astatine. (1)
- January 2021 (R), Paper 2, Q2(b)(i) (2 marks): Explain which species acts as an oxidising agent in this reaction. (2)
- January 2021 (R), Paper 2, Q2(b)(ii) (3 marks): The reaction occurs because chlorine is more reactive than bromine. Bromine is below chlorine in Group 7. Explain the decrease in reactivity from chlorine to br
- November 2020 (R), Paper 1, Q6(a)(i) (1 mark): Give the name of this group of elements. (1)
- November 2020 (R), Paper 1, Q6(a)(ii) (1 mark): State the colour of chlorine gas. (1)
- November 2020 (R), Paper 1, Q6(c) (6 marks): A student compares the reactivity of the elements bromine, chlorine and iodine. He mixes these pairs of solutions and observes the reactions that occur. • chlor
- January 2020, Paper 1, Q7(a)(i) (1 mark): Which element is a liquid at room temperature? (1) A astatine B bromine C chlorine D iodine
- January 2020, Paper 1, Q7(a)(ii) (1 mark): Which element has the palest colour? (1) A astatine B bromine C chlorine D iodine
- January 2020, Paper 1, Q7(a)(iii) (1 mark): Which element is the least reactive? (1) A astatine B bromine C chlorine D iodine
- January 2020, Paper 1, Q7(b)(i) (2 marks): Complete the table by predicting the missing results. (2)
- January 2020, Paper 1, Q7(b)(ii) (1 mark): State why the teacher does not add bromine solution to sodium bromide solution. (1)
- January 2020, Paper 1, Q7(b)(iii) (1 mark): The word equation for the reaction of bromine with sodium iodide is bromine + sodium iodide → iodine + sodium bromide Write a chemical equation for this reactio
- January 2020 (R), Paper 1, Q3(a) (1 mark): Use the information in the table to deduce the order of reactivity of the halogens X2 , Y2 and Z2 (1) most reactive least reactive
- January 2020 (R), Paper 1, Q3(b) (1 mark): An aqueous solution of halogen Y2 is orange. This solution is decolourised when it reacts with an alkene. Deduce the identity of halogen Y2 (1)
- January 2020 (R), Paper 1, Q3(c)(i) (3 marks): The table shows some physical properties of the halogens. Complete the table by predicting a boiling point for chlorine, the state of fluorine at room temperatu
- January 2020 (R), Paper 1, Q3(c)(ii) (1 mark): Why do the halogens have similar chemical properties? (1) A they are non-metals B they are molecules C they have the same number of outer shell electrons D they
- January 2020 (R), Paper 1, Q3(d)(i) (1 mark): Suggest why the teacher does the reaction in a fume cupboard. (1)
- June 2019, Paper 2, Q2(a) (2 marks): Complete the table. (2)
- June 2019, Paper 2, Q2(c) (4 marks): A student is given an aqueous solution of chlorine and an aqueous solution of potassium bromide. Explain how he can use these two solutions to compare the react
- June 2019, Paper 2, Q8(a) (2 marks): Explain a safety precaution that should be taken when doing this experiment. (2)
- June 2019 (R), Paper 2, Q4(a) (2 marks): The table gives the colour and physical state at room temperature of the halogens. Complete the table by predicting the colour of astatine and the physical stat
- June 2019 (R), Paper 2, Q4(b) (2 marks): Chlorine gas is bubbled into a colourless solution of potassium bromide. Explain why the solution turns orange. (2)
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