Pollution of Air and Water Important Questions and Answers

Pollution of Air and Water Important Questions and Answers

For all the students preparing for class 8 exam or competition exam, from time to time we keep giving very important information related to this on our website. If you are looking for questions and answers related to class 8, then in today’s post we are giving important questions and their answers related to class 8 air and water pollution. Remember them carefully because these questions have already come in class 8 and competition exams. So read them well and make your exam preparation better.

Question 1. Who is responsible for the degradation of environmental quality?
Answer: Humans and their activities.

Question 2. Which environmental conditions are not available nowadays?
Answer: Clean sky, fresh air, clean water, etc.

Question 3. What are the components of air?
Answer: Air components are a mixture of gases, including 78% nitrogen, 21% oxygen, and 1% other gases such as carbon dioxide, carbon monoxide, water vapor, argon, ozone, methane, etc.

Question 4. Which substance is the main air pollutant?
Answer: Smoke.

Question 5. What are the main causes of smoke?
Answer: The causes of smoke are (i) vehicles and (ii) burning of fuels.

Question 6. Write the names of some natural air pollutants.
Answer: Smoke, dust.

Question 7. Which disease spreads from air pollution?
Answer: Respiratory problems.

Question 8. Which gases are emitted from vehicles?
Answer: Carbon dioxide, carbon monoxide, nitrogen oxides, smoke, etc.

Question 9. Which gas reduces the ability of blood to absorb oxygen?
Answer: Carbon monoxide.

Question 10. What is smog?
Answer: Smog is a mixture of smoke and fog.

Question 11. Name some respiratory problems.
Answer: Asthma, cough, wheezing in children.

Question 12. Which chemicals are suitable in refrigerants, air conditioners, and perfumes?
Answer: Chlorofluorocarbons.

Question 13. What are the harmful effects of chlorofluorocarbons?
Answer: Chlorofluorocarbons (CFCs) destroy the ozone layer.

Question 14. Why is the ozone layer important?
Answer: It protects the Earth from the sun’s UV rays.

Question 15. What are the sources of suspended solid particles in the air?
Answer: (i) Burning of petrol, diesel in vehicles. (ii) Industrial processes like steel production and mining. (iii) Power plants.

Question 16. What are the adverse effects of suspended solid particles?
Answer: They reduce visibility.

Question 17. Who is responsible for the destruction of the Taj located in Agra by acid rain?
Answer: Rubber processing, automated vehicles, chemicals, Mathura oil refining.

Question 18. What are acid gases?
Answer: Sulfur dioxide, sulfur trioxide, nitrogen oxide.

Question 19. Write the names of two clean fuels.
Answer: CNG and LPG.

Question 20. Which gas traps the sun’s rays and warms the environment?
Answer: Carbon dioxide.

Question 21. Write the names of some greenhouse gases.
Answer: Methane, ozone, water vapor, carbon dioxide.

Question 22. Which treaty has been signed to reduce greenhouse gas effects?
Answer: Kyoto Protocol.

Question 23. Write the names of some alternative energy sources.
Answer: Solar energy, hydropower, wind energy.

Question 24. When is the forest festival celebrated in India?
Answer: Every year in July.

Question 25. What should be done with dry leaves?
Answer: Dry leaves should be put into compost pits to prepare compost.

Question 26. What changes occur in the properties of water?
Answer: Smell, color, and acidity.

Question 27. Write the names of water pollutants.
Answer: Sewage, poisonous substances, pesticides, fertilizer killers, etc.

Question 28. When was the Ganga Action Plan initiated?
Answer: In 1985.

Question 29. Where is the Ganga River inanimate?
Answer: The places where pollution levels have increased drastically, aquatic life has been destroyed.

Question 30. Which city is highly polluted by the Ganges River?
Answer: Kanpur.

Question 31. What are the reasons for the low oxygen levels in water?
Answer: The increase and death of seaweed.

Question 32. Write some waterborne diseases.
Answer: Cholera, typhoid, jaundice.

Question 33. Which microorganisms are waterborne?
Answer: Waterborne microorganisms-bacteria, virus, fungi, dead, etc.

Question 34. Define drinking water.
Answer: Drinking water is called drinking water.

Question 35. Write about the properties of drinking water.
Answer: Colorless, odorless, soluble, impurity and microorganism-free.

Question 36. What percent of the population is not available for drinking water?
Answer: –

Question 37. What is a common home filter?
Answer: Candle filter.

Question 38. By which process are bacteria filled with water?
Answer: Boiling.

Question 39. Write the names of some chemicals that purify water.
Answer: Viranjak powder or chlorine, ozone and iodine gas.

Question 40. What is the 3R principle?
Reduce, Reuse, and Recycle

In this post you have been given very important questions and answers related to class 8 science chapter 18 question answer Pollution of air and water class 8 question answer class 8 science chapter 18 air and water pollution question answer class 8 science chapter 18 question answer air and water pollution question answer air and water pollution class 8. If you find these questions and answers useful, then share them with your friends and if you want to know or ask something regarding this then make sure to ask by commenting below.