Air quality and climate — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

24 The diagram shows a fire triangle. X Y oxygen What are X and Y? X Y A air catalyst B air heat C fuel catalyst D fuel heat

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2007

26 An element present in fuels such as coal and coke is ……1……. When the fuel is ……2…… this element reacts to form an ……3…… gas that is harmful to trees. Which words correctly complete gaps 1, 2 and 3? 1 2 3 A carbon burned alkaline B carbon distilled acidic C nitrogen reduced alkaline D sulfur burned acidic

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2009

24 Nitrogen oxides are formed when car engines burn fossil fuels. Which row shows why nitrogen oxides are unwanted products? acidic pollutant A no no B no yes C yes no D yes yes

1 marks

Answer: D

This question in 0654/11 May/June 2010

17 Nitrogen oxides are formed when car engines burn fossil fuels. Which row shows why nitrogen oxides are unwanted products? acidic pollutant A no no B no yes C yes no D yes yes

1 marks

Answer: D

This question in 0654/12 May/June 2010

25 Waste material buried underground can decay to form gas X which can be used as a fuel. X burns to form an oxide Y and water. X + oxygen → Y + water What is Y? A carbon dioxide B nitrogen dioxide C sulfur dioxide D sulfur trioxide

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2010

26 Waste material buried underground can decay to form gas X which can be used as a fuel. X burns to form an oxide Y and water. X + oxygen → Y + water What is Y? A carbon dioxide B nitrogen dioxide C sulfur dioxide D sulfur trioxide

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2010

26 The burning of a fuel is investigated using the apparatus shown. suction pump flame liquid fuel liquid limewater cooling mixture Which substances is the apparatus testing for? A carbon monoxide and carbon dioxide B carbon monoxide and water C carbon dioxide and water D carbon dioxide and sulfur dioxide

1 marks

Answer: C

This question in 0654/11 May/June 2012

26 The burning of a fuel is investigated using the apparatus shown. suction pump flame liquid fuel liquid limewater cooling mixture Which substances is the apparatus testing for? A carbon monoxide and carbon dioxide B carbon monoxide and water C carbon dioxide and water D carbon dioxide and sulfur dioxide

1 marks

Answer: C

This question in 0654/12 May/June 2012

27 Which gas emitted from a car exhaust contributes to acid rain? A carbon monoxide, CO B nitrogen, N2 C nitrogen oxide, NOx D water vapour, H2O

1 marks

Answer: C

This question in 0654/12 May/June 2013

27 The main element present in coal is ……1…… . When coal is ……2…… , an ……3…… gas that is harmful to trees is produced. Which words correctly complete gaps 1, 2 and 3? 1 2 3 A carbon burned acidic B carbon distilled alkaline C nitrogen reduced acidic D sulfur burned alkaline

1 marks

Answer: A

This question in 0654/11 May/June 2014

27 The main element present in coal is ……1…… . When coal is ……2…… , an ……3…… gas that is harmful to trees is produced. Which words correctly complete gaps 1, 2 and 3? 1 2 3 A carbon burned acidic B carbon distilled alkaline C nitrogen reduced acidic D sulfur burned alkaline

1 marks

Answer: A

This question in 0654/12 May/June 2014

26 The main element present in coal is ……1…… . When coal is ……2…… , an ……3…… gas that is harmful to trees is produced. Which words correctly complete gaps 1, 2 and 3? 1 2 3 A carbon burned acidic B carbon distilled alkaline C nitrogen reduced acidic D sulfur burned alkaline

1 marks

Answer: A

This question in 0654/13 May/June 2014

26 The diagram shows waste organic material decaying. tap methane gas decaying waste organic material What is formed when the gas, methane, is burned? A carbon dioxide and water B carbon dioxide only C carbon monoxide D water only

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2014

12 Which gas has the biggest greenhouse effect? A carbon monoxide B methane C nitrogen D oxygen

1 marks

Answer: B

This question in 0654/11 May/June 2015

25 Which process does not produce carbon dioxide? A complete combustion of fossil fuels B reaction of an acid with a carbonate C respiration in plants D rusting iron

1 marks

Answer: D

This question in 0654/11 May/June 2015

24 Air is a mixture of gases. The diagram shows the composition of air. gas X gas Y gas Z What are gases X, Y and Z? gas X gas Y gas Z A N2 O2 noble gases, CO2, H2O B noble gases, CO2, H2O N2 O2 C noble gases, CO2, H2O O2 N2 D O2 noble gases, CO2, H2O N2

1 marks

Answer: C

This question in 0654/12 May/June 2015

13 Which two gases are considered to be air-polluting gases and contribute to global warming? A carbon dioxide and methane B carbon dioxide and nitrogen C oxygen and methane D oxygen and nitrogen

1 marks

Answer: A

This question in 0654/13 May/June 2015

25 Which gas forms 78% of the air? A argon B carbon dioxide C nitrogen D water vapour

1 marks

Answer: C

This question in 0654/13 May/June 2015

25 Some of the gases found in polluted air are listed. 1 carbon monoxide 2 carbon dioxide 3 nitrogen dioxide 4 sulfur dioxide Which gases cause the erosion of buildings? A 1 and 3 B 1 and 4 C 2 and 4 D 3 and 4

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2015

13 What is an effect of increased methane in the atmosphere? A a decrease in soil erosion B an increase in new plant species C the cooling of the Earth’s atmosphere D the melting of the polar ice caps

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2015

24 Which process does not produce carbon dioxide? A acid reacting with a metal B acid reacting with sodium carbonate C complete combustion of methane D respiration

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2015

25 Which gas emitted from a car exhaust contributes to acid rain? A carbon monoxide, CO B nitrogen, N2 C nitrogen monoxide, NO D water vapour, H2O

1 marks

Answer: C

This question in 0654/11 May/June 2016

25 Which gas emitted from a car exhaust contributes to acid rain? A carbon monoxide, CO B nitrogen, N2 C nitrogen monoxide, NO D water vapour, H2O

1 marks

Answer: C

This question in 0654/12 May/June 2016

24 Which gas emitted from a car exhaust contributes to acid rain? A carbon monoxide, CO B nitrogen, N2 C nitrogen monoxide, NO D water vapour, H2O

1 marks

Answer: C

This question in 0654/13 May/June 2016

25 The diagram represents the composition of clean air. gas X gas Y Which row identifies gas X and gas Y? gas X gas Y A carbon dioxide nitrogen B nitrogen oxygen C oxygen carbon dioxide D oxygen nitrogen

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2017

13 The concentration of carbon dioxide in the atmosphere has increased during the last 200 years. What has contributed to this change? A burning large areas of forest B increased use of pesticides C planting more crops D using fewer fossil fuels

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2017

24 Which gas is the most abundant in clean air? A argon B carbon dioxide C nitrogen D oxygen

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2018

24 Which processes lead to the formation of a greenhouse gas? 1 reaction of sodium with water 2 respiration 3 combustion of fossil fuels A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: C

This question in 0654/11 May/June 2019

24 A sample of air is analysed before and after it is used in an experiment. The percentage composition of the air before and after the experiment is recorded. nitrogen oxygen carbon dioxide other gases before 78 21 0.04 small amount after 78 17 4 small amount Which process does not produce this change in the composition of the air? A combustion of coal B combustion of natural gas C combustion of sulfur D respiration

1 marks

Answer: C

This question in 0654/12 May/June 2019

24 A sample of air is analysed before and after it is used in an experiment. The percentage composition of the air before and after the experiment is recorded. nitrogen oxygen carbon dioxide other gases before 78 21 0.04 small amount after 78 17 4 small amount Which process does not produce this change in the composition of the air? A combustion of coal B combustion of natural gas C combustion of sulfur D respiration

1 marks

Answer: C

This question in 0654/13 May/June 2019

24 Which pie chart represents the composition of clean air? A B N2 O2 other H2 gases O2 N2 C D O2 H2 other O2 gases N2 N2

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2019

24 Which gas is an acidic pollutant in air? A argon B carbon monoxide C sulfur dioxide D water vapour

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2020

25 Which row about carbon dioxide and methane is correct? carbon dioxide methane v v x x v x v x key ¥ = greenhouse gas X = not a greenhouse gas

1 marks

Answer: A

This question in 0654/12 Feb/March 2021

24 Which process does not produce carbon dioxide? A complete combustion of fossil fuels B reaction of an acid with a carbonate C respiration in plants D rusting iron

1 marks

Answer: D

This question in 0654/11 Oct/Nov 2021

24 Which process does not produce carbon dioxide? A complete combustion of fossil fuels B reaction of an acid with a carbonate C respiration in plants D rusting iron

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2021

24 Which process does not produce carbon dioxide? A complete combustion of fossil fuels B reaction of an acid with a carbonate C respiration in plants D rusting iron

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2021

25 Which row shows the relative abundance of the gases in clean air? most abundant least abundant A nitrogen argon oxygen B nitrogen oxygen argon C oxygen carbon dioxide nitrogen D oxygen nitrogen carbon dioxide

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2022

25 Which statements about limestone are correct? 1 Its main constituent is calcium oxide. 2 It can be used to manufacture lime. 3 It thermally decomposes to release carbon dioxide. 4 It is used to neutralise alkaline soils. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: C

This question in 0654/11 May/June 2023

24 Which element is used in the manufacture of sulfuric acid? A carbon B hydrogen C nitrogen D sulfur

1 marks

Answer: D

This question in 0654/12 May/June 2023

19 When petrol burns in a car engine, carbon monoxide, CO, and nitrogen monoxide, NO, are produced. These gases pass through a catalytic converter where carbon monoxide reacts with nitrogen monoxide. The equation for the reaction is shown. carbon monoxide + nitrogen monoxide  nitrogen + carbon dioxide Which statement is not correct? A Carbon monoxide is oxidised in the catalytic converter. B Carbon monoxide is produced by the complete combustion of petrol. C Nitrogen from the air is oxidised in the car engine. D Nitrogen monoxide is reduced in the catalytic converter.

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2023

25 Which gas is present in clean air? A carbon dioxide B carbon monoxide C nitrogen dioxide D sulfur dioxide

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2023

24 Which gas is an air pollutant? A argon B carbon dioxide C nitrogen D sulfur dioxide

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2023

25 Water vapour, carbon dioxide and the noble gases are removed from a 100 cm3 sample of clean air. What is the remaining volume? A 1 cm3 B 21 cm3 C 78 cm3 D 99 cm3

1 marks

Answer: D

This question in 0654/11 May/June 2024

24 Which volume of clean air contains 10.5 cm3 of oxygen? A 21 cm3 B 42 cm3 C 50 cm3 D 100 cm3

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2024

24 Which volume of clean air contains 10.5 cm3 of oxygen? A 21 cm3 B 42 cm3 C 50 cm3 D 100 cm3

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2024

23 The diagram represents the composition of clean, dry air. gas Y gas X Which row identifies gas X and gas Y? gas X gas Y A nitrogen oxygen B oxygen nitrogen C oxygen carbon dioxide D carbon dioxide nitrogen

1 marks

Answer: A

This question in 0654/12 May/June 2025

23 The diagram represents the composition of clean, dry air. gas Y gas X Which row identifies gas X and gas Y? gas X gas Y A nitrogen oxygen B oxygen nitrogen C oxygen carbon dioxide D carbon dioxide nitrogen

1 marks

Answer: A

This question in 0654/13 May/June 2025

24 Which air pollutants are produced by the combustion of fossil fuels in car engines? A carbon monoxide, oxides of nitrogen and sulfur dioxide B carbon monoxide and sulfur dioxide only C carbon monoxide and oxides of nitrogen only D oxides of nitrogen and sulfur dioxide only

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2025