Environmental Pollution
Chemistry · 50 practice questions
Sources and effects of pollutants; air pollution (e.g. H₂S, CO, SO₂, oxides of nitrogen, chlorofluorocarbons, dust); water pollution (sewage and oil pollution); soil pollution (oil spillage, biodegradable and non-biodegradable pollutants).
- Identify the different types of pollution and pollutants.
- Specify different sources of pollutants.
- Classify pollutants as biodegradable or non-biodegradable.
- Specify the effects of pollution on the environment.
- Identify measures for controlling environmental pollution.
Try a few questions
- Practice question 1
Thermal pollution mainly refers to
- A.the release of excessive noise into the environment
- B.the discharge of heated water, such as from an industrial power plant, into a natural water body
- C.the contamination of soil by spilled oil
- D.the depletion of the ozone layer by CFCs
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B. the discharge of heated water, such as from an industrial power plant, into a natural water body
Elevated water temperatures from discharged heated water can reduce dissolved oxygen and stress aquatic life.
- Practice question 2
A practical method for cleaning up soil contaminated by an oil spillage is
- A.adding more oil to dilute the existing contamination
- B.sealing the soil permanently with an impermeable layer, with no further treatment
- C.ignoring the spillage, since oil naturally poses no risk to soil
- D.bioremediation, using micro-organisms to help break down the oil
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D. bioremediation, using micro-organisms to help break down the oil
Certain micro-organisms can metabolize components of spilled oil, gradually helping to clean up contaminated soil.
- Practice question 3
Untreated industrial effluent discharged into a river mainly can
- A.purify the river water of any pre-existing contamination
- B.have no measurable effect on the river's water quality
- C.immediately increase the river's dissolved oxygen levels
- D.introduce harmful chemicals and reduce the overall quality of the water
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D. introduce harmful chemicals and reduce the overall quality of the water
Raw industrial discharge commonly introduces pollutants that degrade water quality for both people and wildlife.
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