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.
A student uses cobalt(II) chloride paper to test for the presence of water. What is the initial color of the anhydrous paper and the final color after the test?
A.Initial: Blue, Final: Pink
B.Initial: White, Final: Blue
C.Initial: Pink, Final: Blue
D.Initial: Blue, Final: White
- 2.
Which property of a liquid sample is the most reliable evidence that it is pure water?
A.It turns anhydrous cobalt(II) chloride paper pink
B.It has a pH of exactly 7
C.It is colorless and odorless
D.It boils at exactly at atmosphere of pressure
- 3.
Why is chlorine gas added to water during the final stages of the water treatment process?
A.To remove insoluble grit and sand
B.To improve the taste of the water
C.To kill harmful bacteria and microorganisms
D.To remove dissolved metal ions
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.
Which of the following is a common chemical compound used as a nitrogen-based fertiliser?
A.B.C.D. - 2.
A farmer finds that his crops have very poor root development. Which component of the NPK fertiliser should he ensure is present in higher concentrations?
A.Nitrogen
B.Potassium
C.Phosphorus
D.Magnesium
- 3.
Which element in NPK fertilisers is primarily responsible for promoting healthy green leaves and stem growth?
A.Nitrogen
B.Phosphorus
C.Potassium
D.Sulfur
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.
Which gas is produced by the incomplete combustion of carbon-containing fuels, such as gasoline in a car engine?
A.Oxygen
B.Carbon dioxide
C.Carbon monoxide
D.Nitrogen
- 2.
Carbon monoxide is considered a toxic air pollutant. What is its primary physiological effect on humans?
A.It causes the skin to burn upon contact
B.It binds to hemoglobin and reduces the transport of oxygen in the blood
C.It reacts with stomach acid to produce toxic chlorine gas
D.It destroys the lining of the lungs by acting as a strong dehydrating agent
- 3.
Which gas is a major pollutant primarily responsible for the formation of acid rain?
A.Argon
B.Sulfur dioxide
C.Carbon monoxide
D.Methane
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 is a direct consequence of the enhanced greenhouse effect leading to global warming?
A.An increase in the concentration of noble gases in the air
B.A decrease in the rate of plant growth worldwide
C.The thinning of the stratospheric ozone layer
D.Rising sea levels due to the thermal expansion of oceans and melting ice caps
- 2.
Which activity is a major anthropogenic (human-caused) source of methane () gas in the atmosphere?
A.Decomposition of vegetation in rice paddy fields
B.The combustion of hydrogen fuel in spacecraft
C.The use of catalytic converters in modern cars
D.The extraction of aluminum from bauxite ore
- 3.
The greenhouse effect occurs because certain gases in the atmosphere trap a specific type of radiation. Which radiation is absorbed by these gases?
A.Ultraviolet radiation
B.Visible light
C.Thermal infrared radiation
D.X-ray radiation
Download the worksheet for Chemistry of the Environment - Greenhouse effect and climate change to practice offline. It includes additional chapter-level practice questions.