Chemistry 5070 · O Level
Air quality and climate
45 practice questions on Air quality and climate, with worked solutions and instant marking.
The table gives the composition of exhaust gases from an internal combustion engine. Which gas is $Y$?
May/June 2015
Which two gases do not harm limestone buildings?
May/June 2015
Which two gases do not harm limestone buildings?
May/June 2015
The diagram illustrates an experiment used to find the percentage of oxygen in air. Which diagram shows the water at the correct level after the candle has gone out?
May/June 2016
The atmosphere is made up of many gases, among them oxygen, nitrogen, carbon dioxide, sulfur dioxide, oxides of nitrogen, methane and chlorofluorocarbons (CFCs).
May/June 2016
Some internal combustion engines run on fossil fuels. Which pollutants are released by an internal combustion engine when it burns fossil fuels?
May/June 2017
Which list includes only gases that are always found in unpolluted air?
May/June 2017
Air contains many different gases.
May/June 2019
The diagram illustrates an experiment used to find the percentage of oxygen in air. Which diagram shows the correct water level once the candle has gone out?
May/June 2022
Which of the following statements about global warming is correct?
May/June 2023
Which statement regarding air pollutants is correct?
May/June 2023
Nitrogen oxides, for instance nitrogen monoxide, NO, are pollutants in the atmosphere. In the exhaust from a car engine, nitrogen monoxide accounts for 0.00200% by volume.
May/June 2023
Carbon dioxide is a greenhouse gas and is associated with greater global warming.
May/June 2024
Methane, nitrogen monoxide and sulfur dioxide count as air pollutants.
May/June 2024
Which row gives an adverse effect of the pollutant named?
May/June 2025
Three statements concerning global warming and greenhouse gases are given. Which statements are correct?
May/June 2025
Which strategy can be used to cut methane emissions?
May/June 2025
Vehicles running on petrol release a number of air pollutants.
May/June 2025
What substances are produced in photosynthesis?
Oct/Nov 2015
An ozone layer occurs in the stratosphere around 30 km above the Earth’s surface.
Oct/Nov 2015
Which two products are made during photosynthesis?
Oct/Nov 2016
The table sets out some atmospheric pollutants and their possible effects. Which row is incorrect?
Oct/Nov 2016
The table lists some atmospheric pollutants and their possible effects. Which row is incorrect?
Oct/Nov 2016
A student moves air backwards and forwards over heated copper. The air originally occupies $50.0\,\text{cm}^3$ in the apparatus.
Oct/Nov 2016
The diagram illustrates a section of the carbon cycle. What are processes P, Q and R?
Oct/Nov 2017
CFC compounds have been used as aerosol propellants. The structure of one CFC compound is shown. Which element in this compound is responsible for ozone depletion in the atmosphere?
Oct/Nov 2017
CFC compounds were once used as aerosol propellants. The formula of one CFC compound is shown. Which element in this compound leads to depletion of ozone in the atmosphere?
Oct/Nov 2017
Pollutant gases are given off as vegetable matter undergoes bacterial decay. The bacterial decay of vegetable matter is the main source of which gas?
Oct/Nov 2018
Bacterial decomposition of vegetable matter gives off pollutant gases. The bacterial decay of vegetable matter is the main source of which gas?
Oct/Nov 2018
A student tries to work out the percentage of oxygen in air by using the apparatus shown.
Oct/Nov 2018
Methane and sulfur dioxide are two air pollutants present in the Earth’s atmosphere. Which row correctly gives one source of each gas?
Oct/Nov 2019
Z is a pollutant gas produced in internal combustion engines. When Z is dissolved in water, the resulting solution is acidic. In a catalytic converter, Z is removed from exhaust gases by reduction. What is the identity of Z?
Oct/Nov 2019
Carbon dioxide, methane and oxygen are gases that take part in the carbon cycle. Which of these gases can contribute to global warming?
Oct/Nov 2020
Gas X is found in dry air and can help cause global warming. What is X?
Oct/Nov 2020
The carbon cycle controls how much carbon dioxide is present in the atmosphere. Combustion, photosynthesis and respiration all take part in this cycle. In what ways do these processes change the amount of carbon dioxide in the atmosphere?
Oct/Nov 2021
Dry air is made up of nitrogen, oxygen, noble gases and carbon dioxide.
Oct/Nov 2021
This question concerns pollutant gases.
Oct/Nov 2021
Three statements concerning the carbon cycle are provided.
Oct/Nov 2022
The gases below may occur in air. 1 neon 2 carbon monoxide 3 nitrogen 4 methane Which of these gases are pollutants in the atmosphere?
Oct/Nov 2023
A range of methods for reducing the impact of environmental problems has been proposed. Which row is correct?
Oct/Nov 2023
Three processes are shown. 1 the breakdown of vegetation 2 exhaust emissions from a car engine 3 photosynthesis Which row shows a gas produced in each process?
Oct/Nov 2024
Which row about the harmful effects of air pollutants is accurate?
Oct/Nov 2024
Carbon dioxide, methane and oxygen are gases that take part in the carbon cycle. Which of these gases lead to global warming?
Oct/Nov 2025
Dry air consists of a blend of gases. 99% of this blend is nitrogen and oxygen. Which gas is present in the greatest amount in the remaining 1%?
Oct/Nov 2025
Air is made up of a mixture of gases.
Oct/Nov 2025