Air pollution is the presence of chemicals or particles in the air that can harm the health of humans, animals, and plants.
The majority of air pollution is caused by humans, in the form of emissions from factories, cars, planes, or aerosol cans.
Some types of air pollution occur naturally, such as smoke from wildfires or ash from volcanoes.
Water pollution is defined as the contamination of water sources by substances that render the water unfit for drinking, cooking, cleaning, swimming, and other activities. Chemicals, trash, bacteria, and parasites are all examples of pollutants. All types of pollution eventually end up in the water.
Download PDF of Class 8 Chemistry Worksheet on Chapter 18 Pollution of Air and Water – Set 2
CBSE Class 8 Chemistry Worksheet Chapter 18 Pollution of Air and Water – Set 2
Q1. Some of the major contaminants of water are:
a.) Sewage
b.) Agricultural chemicals
c.) Industrial waste
d.) All of the above
Q2. Rain, snow or fog which are acidic in nature is known as:
a.) Acid rain
b.) Acid snow
c.) Acid fog
d.) All of the above
Q3. CFCs causes:
a.) greenhouse effect
b.) Global warming
c.) Ozone layer depletion
d.) All of the above
Q4. Which of the following is not a source of air pollution?
a.) Automobile exhaust
b.) Burning of fossil fuels
c.) Power plants
d.) Windmill
Q5. Van Mahotsav is celebrated in which month?
a.) June
b.) July
c.) August
d.) September
Q6. Fill in the blanks:
a.) Water which is fit for drinking is called ___ water.
b.) The kind of pollutants which are used in air conditioners and refrigerators are ___.
c.) The combination of smoke and fog is called ___.
d.) Cholera is a ____ disease.
e.) Two sources of air pollution caused due to suspended particulate matter are ___ and ___.
Q7. What is air pollution?
Q8. What are the alternative sources of energy which do not cause any pollution?
Q9. What is ozone layer depletion?
Q10. How do forest fires cause air pollution?
Q11. What is the greenhouse effect?
Q12. Explain eutrophication.
Q13. What are the causes of air pollution?
Q14. What are the harmful effects of acid rain?
Q15. How can water be purified for drinking purposes?
Q16. What are the harmful effects of global warming?
Q17. State the main steps to be taken to prevent water pollution.
Q18. How can water pollution be prevented?
Q19. How can we control air pollution?
Q20. Write a short note on the Ganga Action plan.
Download PDF to access answers of Chemistry Worksheet for Class 8 Chemistry Chapter 18 Pollution of Air and Water Set – 2
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Read Also:
- Causes of Water Pollution
- Prevention of Air Pollution
- Air Pollution Questions
- Class 8 Chemistry Chapter 18 – Pollution of Air and Water Important Questions with Answers
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