Group VII properties
8.3What the syllabus asks of you
- Describe the Group VII halogens, chlorine, bromine and iodine, as diatomic non-metals with general trends down the group, limited to: (a) increasing density (b) decreasing reactivity
- State the appearance of the halogens at r.t.p. as: (a) chlorine, a pale yellow-green gas (b) bromine, a red-brown liquid (c) iodine, a grey-black solid
- Describe and explain the displacement reactions of halogens with other halide ions
- Predict the properties of other elements in Group VII, given information about the elements
Read the notes first
Chapter 8: Group VII properties
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Every question on Group VII properties, untimed, marked as you go.
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13 questions
1May / June 2026 · Paper 11 · Q21Show mark scheme →
Acolourless / orange
Bcolourless / brown
Corange / colourless
Dorange / brown
Mark scheme
2Oct / Nov 2025 · Paper 11 · Q22Show mark scheme →
Aaqueous potassium iodide: yes; aqueous potassium bromide: yes
Baqueous potassium iodide: yes; aqueous potassium bromide: no
Caqueous potassium iodide: no; aqueous potassium bromide: yes
Daqueous potassium iodide: no; aqueous potassium bromide: no
Mark scheme
3May / June 2025 · Paper 11 · Q24Show mark scheme →
ANoble gases are unreactive because they all have eight electrons in their outer shells.
BThe Group VII element astatine, At2, is expected to be a black solid at room temperature.
CThe reactivity of the elements in both Group I and Group VII increases down the group.
DWhen aqueous chlorine is added to aqueous potassium bromide, there is no change in colour.
Mark scheme
4May / June 2025 · Paper 12 · Q24Show mark scheme →
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
Mark scheme
5Oct / Nov 2023 · Paper 11 · Q24Show mark scheme →
ABromine consists of Br2 molecules at room temperature and pressure.
BIodine will displace bromine from aqueous potassium bromide.
CThe halogens become darker in colour as the relative molecular mass decreases.
DThe halogens become more volatile as the relative molecular mass increases.
Mark scheme
6Oct / Nov 2023 · Paper 12 · Q24Show mark scheme →
A
B
C
D
Mark scheme
7Oct / Nov 2022 · Paper 11 · Q31Show mark scheme →
Aboth statement 1 and statement 2
Bstatement 1 only
Cstatement 2 only
Dneither statement 1 nor statement 2
Mark scheme
8Oct / Nov 2021 · Paper 12 · Q20Show mark scheme →
ABromine is oxidised and chloride ions are reduced.
BBromine is reduced and chloride ions are oxidised.
CNeither oxidation nor reduction takes place.
DSodium ions are oxidised.
Mark scheme
9Oct / Nov 2021 · Paper 12 · Q29Show mark scheme →
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
Mark scheme
10May / June 2020 · Paper 12 · Q25Show mark scheme →
AKI(aq) ✓ KBr(aq) ✓
BKI(aq) ✓ KBr(aq) ✗
CKI(aq) ✗ KBr(aq) ✓
DKI(aq) ✗ KBr(aq) ✗
Mark scheme
11Oct / Nov 2019 · Paper 11 · Q24Show mark scheme →
ATheir atoms decrease in size down the group.
BTheir melting points increase down the group.
CThey conduct electricity when molten.
DTheir silver salts are all soluble in water.
Mark scheme
12May / June 2017 · Paper 12 · Q25Also set in May / June 2017 Paper 11Show mark scheme →
AQ is a metal.
BQ is more reactive than T.
CR is more reactive than Z.
DT and Z are in the same period.
Mark scheme
13Oct / Nov 2016 · Paper 11 · Q27Show mark scheme →
ABr2(aq) + 2NaCl(aq) → 2NaBr(aq) + Cl2(aq)
BBr2(aq) + 2NaI(aq) → 2NaBr(aq) + I2(aq)
CI2(aq) + 2NaCl(aq) → 2NaI(aq) + Cl2(aq)
DI2(aq) + 2NaBr(aq) → 2NaI(aq) + Br2(aq)
Mark scheme