C8.5· 16 questions · 16 marks · 19 min · 2017–2025· Multiple choice
Every Cambridge IGCSE Science - Combined Paper 2 question on noble gases, laid out as 4 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.





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4 / 4Answers below. Sit the paper first if you are practising.
Pastlit
Science - Combined 0653 · Noble gases — Paper 2
IGCSE · topical answer key — answer key (teacher use)
Question
Answer
Marks
| Question | Answer | Marks | From |
|---|---|---|---|
| 1 | B | 1 | 0653/22 Oct/Nov 2017 |
| 2 | C | 1 | 0653/23 Oct/Nov 2017 |
| 3 | A | 1 | 0653/22 Feb/March 2018 |
| 4 | A | 1 | 0653/21 Oct/Nov 2018 |
| 5 | D | 1 | 0653/22 Oct/Nov 2018 |
| 6 | B | 1 | 0653/23 Oct/Nov 2018 |
| 7 | C | 1 | 0653/23 Oct/Nov 2018 |
| 8 | A | 1 | 0653/21 Oct/Nov 2019 |
| 9 | D | 1 | 0653/22 Oct/Nov 2019 |
| 10 | B | 1 | 0653/22 Feb/March 2020 |
| 11 | C | 1 | 0653/23 Oct/Nov 2021 |
| 12 | D | 1 | 0653/22 Feb/March 2022 |
| 13 | D | 1 | 0653/22 Feb/March 2023 |
| 14 | C | 1 | 0653/22 Oct/Nov 2023 |
| 15 | D | 1 | 0653/21 Oct/Nov 2024 |
| 16 | A | 1 | 0653/22 May/June 2025 |
24 Weather balloons are used to carry scientific instruments into the atmosphere. Which gas is used to fill the balloons? A argon B helium C krypton D xenon
1 marks
Answer: B
24 What is a use for argon? A as a fuel B filling balloons C providing an inert atmosphere D the extraction of copper
1 marks
Answer: C
24 The noble gases make up Group VIII of the Periodic Table. Which statement is correct? A Argon exists as non-bonded atoms. B Krypton is very poisonous. C Neon burns in pure oxygen with a red flame. D The chemical formula of helium is He2.
1 marks
Answer: A
24 Which gas is used to provide an inert atmosphere in lamps? A argon B helium C neon D nitrogen
1 marks
Answer: A
24 Which statement about noble gases is not correct? A A neon atom has a full outer shell of electrons. B Helium is used to fill balloons. C Noble gases are very unreactive. D Noble gases exist as molecules containing two atoms.
1 marks
Answer: D
16 Which is the electronic structure of a noble gas? A 2,6 B 2,8 C 2,8,1 D 2,8,7
1 marks
Answer: B
24 Which gas is used to fill weather balloons? A argon B carbon dioxide C helium D nitrogen
1 marks
Answer: C
23 Which statement about elements in the Periodic Table is not correct? A Elements in Group I react by gaining electrons to form ions. B Elements in Group II have two electrons in their outer shell. C Elements in Group VIII are unreactive because they have full outer shells of electrons. D Elements with seven outer shell electrons are non-metals.
1 marks
Answer: A
21 Which row describes the reactivity and the electronic structure of a noble gas? reactivity electronic structure A reactive full outer shell B reactive incomplete outer shell C unreactive incomplete outer shell D unreactive full outer shell
1 marks
Answer: D
23 Rubidium is a very reactive Group I metal. It is kept in a sealed box surrounded by a gas. gas rubidium Which gas does not react with rubidium? A chlorine B neon C oxygen D water vapour
1 marks
Answer: B
21 Some properties of noble gases are shown. melting boiling density point / C point / C g / cm3 helium –272 –269 0.0002 neon argon –189 krypton –152 0.0059 xenon –112 –108 0.0097 What are the properties of neon? melting boiling density point / C point / C g / cm3 A –251 –274 0.0004 B –178 –174 0.0041 C –249 –246 0.0008 D –240 –236 0.0062
1 marks
Answer: C
22 Which statement about noble gases is correct? A Argon is used in lamps because it gives out a bright light when it is heated. B Helium is used to fill balloons because it is more dense than air. C Krypton forms diatomic molecules because it is an unreactive gas. D Neon is unreactive because it has a full outer shell of electrons.
1 marks
Answer: D
23 Which row describes a noble gas? type of particle reactivity A diatomic high B diatomic low C monatomic high D monatomic low
1 marks
Answer: D
22 Which properties of argon, Ar, can be determined from its position in the Periodic Table? 1 its number of outer-shell electrons 2 its density 3 its chemical reactivity A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
1 marks
Answer: C
23 Which statement explains why the elements in Group VIII of the Periodic Table are unreactive? A They are gases. B They are non-metals. C They have equal numbers of protons and electrons in their atoms. D They have a full outer shell of electrons.
1 marks
Answer: D
21 Which statement explains why all Group VIII elements are unreactive? A They all have a complete outer shell of electrons. B They all have only two electrons in their outer shell. C They all have eight electrons in their outer shell. D They all have no electrons in their outer shell.
1 marks
Answer: A