Noble gases — Paper 2 · IGCSE Chemistry (9-1) 0971

23 An inert gas R is used to fill weather balloons. Which descriptions of R are correct? number of outer shell structure of gas R electrons in atoms of R A 2 diatomic molecules B 2 single atoms C 8 diatomic molecules D 8 single atoms

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2018

22 Which statement about elements in Group VIII of the Periodic Table is correct? A They all have a full outer shell of electrons. B They all react with Group I elements to form ionic compounds. C They are all diatomic molecules. D They are all liquids at room temperature.

1 marks

Answer: A

This question in 0971/21 May/June 2019

23 Helium is a noble gas. Which statement about helium is correct? A It has eight electrons in its outer shell. B It is a diatomic gas. C It is reactive. D It is used for filling balloons.

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2019

24 A balloon is filled with helium. Helium is a noble gas and makes the balloon rise up in the air. The density of air is 1.23 g / dm3. Which gas is helium? density in g / dm3 reaction with oxygen A 0.0899 burns rapidly B 0.179 does not react with oxygen C 1.78 does not react with oxygen D 3.75 does not react with oxygen

1 marks

Answer: B

This question in 0971/21 May/June 2020

24 Which diagram shows a mixture of noble gases? A B C D

1 marks

Answer: A

This question in 0971/22 May/June 2020

26 A new element oxfordium, Ox, was discovered with the following properties. electrical formula bonding in a solubility conduction of element molecule of Ox2 insoluble in water doesn’t conduct Ox2 Ox Ox In which group of the Periodic Table should the new element be placed? A Group III B Group V C Group VII D Group VIII

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2020

27 A flammable gas needs to be removed from a tank at an industrial plant. For safety reasons, an inert gas is used. Which gas is suitable? A argon B hydrogen C methane D oxygen

1 marks

Answer: A

This question in 0971/22 Oct/Nov 2020

22 Why is helium used to fill balloons? A Helium is monoatomic. B Helium is in Group VIII of the Periodic Table. C Helium has a full outer electron shell. D Helium is less dense than air.

1 marks

Answer: D

This question in 0971/21 May/June 2021

24 The noble gases are in Group VIII of the Periodic Table. Which statement explains why noble gases are unreactive? A They all have eight electrons in their outer shells. B They all have full outer shells. C They are all gases. D They are all monoatomic.

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2021

25 Which diagram represents the arrangement of the outer-shell electrons of a noble gas? A B C D

1 marks

Answer: A

This question in 0971/21 May/June 2022

22 The noble gases are in Group VIII of the Periodic Table. Some properties of the first four noble gases are shown. boiling point density noble gas in g / dm3 in C helium –267 0.179 neon –246 0.900 argon –186 1.782 krypton –152 3.708 Which row identifies the trends in boiling point and in density as Group VIII is descended? boiling point density A decreasing increasing B increasing increasing C decreasing decreasing D increasing decreasing

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2023

23 Which statements describe the elements in Group VIII of the Periodic Table? 1 Their atoms have full outer electron shells. 2 They are unreactive metals. 3 They are monatomic gases. 4 They are diatomic gases. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: A

This question in 0971/22 May/June 2024

21 The table shows some properties of noble gases. density boiling point noble gas in g / dm3 in °C helium 0.2 –269 neon 0.9 –246 argon 1.8 –186 krypton xenon 5.9 –108 Which row predicts the density and the boiling point of krypton? density boiling point in g / dm3 in C A 1.4 –75 B 2.4 –195 C 3.8 –153 D 8.5 –213

1 marks

Answer: C

This question in 0971/22 May/June 2025

25 Part of the Periodic Table is shown. Which element is an inert gas? A B C D

1 marks

Answer: C

This question in 0971/22 Oct/Nov 2025