Chemistry of the Environment
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Water treatment and chemical tests for water
SubtopicWater treatment and chemical tests for water under Chemistry of the Environment for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which of the following ions, if present in high concentrations, causes 'hard water'?
A.Sodium
B.Potassium
C.Calcium
D.Chloride
- 2.
In the context of the environment, what is meant by the 'water cycle'?
A.The use of water in a washing machine
B.The continuous movement of water on, above, and below the surface of the Earth
C.The process of treating water in a factory
D.Testing water with chemical reagents
- 3.
What is the primary source of lead pollution in some older water supply systems?
A.Fertilizer runoff
B.Old lead pipes
C.The atmosphere
D.Chlorine treatment
Download the worksheet for Chemistry of the Environment - Water treatment and chemical tests for water to practice offline. It includes additional chapter-level practice questions.
Fertilisers (NPK)
SubtopicFertilisers (NPK) under Chemistry of the Environment for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
If a farmer wants to boost the yield of a grain crop like wheat, which element is most essential for the development of the seeds?
A.Phosphorus
B.Nitrogen
C.Chlorine
D.Sodium
- 2.
Which of these compounds is a 'nitrogen-only' fertiliser?
A.Urea
B.Potassium nitrate
C.Ammonium phosphate
D.NPK 15-15-15
- 3.
What is the common name for potassium carbonate used in fertilisers?
A.Lime
B.Potash
C.Saltpetre
D.Baking soda
Download the worksheet for Chemistry of the Environment - Fertilisers (NPK) to practice offline. It includes additional chapter-level practice questions.
Air quality and pollutants
SubtopicAir quality and pollutants under Chemistry of the Environment for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
In the context of air quality, what does the term 'flue gas desulfurization' mean?
A.Adding sulfur to fuels
B.Removing sulfur dioxide from waste gases of power stations
C.Increasing the nitrogen content of air
D.Converting carbon dioxide to oxygen
- 2.
What is the primary effect of lead compounds previously used in petrol on human health?
A.Skin rashes
B.Improved vision
C.Brain damage, especially in children
D.Increased lung capacity
- 3.
Which substance is an example of a fossil fuel whose combustion releases sulfur dioxide if not purified?
A.Hydrogen
B.Coal
C.Wood
D.Uranium
Download the worksheet for Chemistry of the Environment - Air quality and pollutants to practice offline. It includes additional chapter-level practice questions.
Greenhouse effect and climate change
SubtopicGreenhouse effect and climate change under Chemistry of the Environment for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
What happens to the solubility of in seawater as the water temperature rises?
A.It increases
B.It decreases
C.It stays the same
D.It doubles
- 2.
Which of these will most likely increase as a result of global warming?
A.The size of glaciers
B.The area of polar ice caps
C.The frequency of extreme weather events
D.The amount of snow in the tropics
- 3.
Which of these is a biological process that releases carbon dioxide?
A.Photosynthesis
B.Respiration
C.Diffusion
D.Osmosis
Download the worksheet for Chemistry of the Environment - Greenhouse effect and climate change to practice offline. It includes additional chapter-level practice questions.