POLLUTION OF AIR AND WATER 8

Practice Paper

Subject Chemistry (2019)

Class VIII                  Ch- POLLUTION OF AIR AND WATER                          

1. Define pollution?
2. What is global warming? Write any one harmful effect of global warming.
3. What is smog? How it is harmful?
4. Why do we need to filter water before drinking? Name any two water borne diseases.
5. What are the causes of air pollution.
6. What is acid rain? How is it formed?
7. Write a short note on depletion of ozone layer.
8. What is eutrophication? Explain.
9. How can you conserve water?
10. Write any three harmful effects of polluted water?
11. What was the Ganga Action Plan? Why it failed in achieving its aim?
12. What measures should be taken to control air pollution?
13. What are the sources of water pollution? 
14. Which gas is the main constituent of air?
15. Give two examples of air pollutants.
16. Which two gases cause acid rain?
17. Which phenomenon is responsible for global warming?
18. Which plan was made to save river Ganga?
19. Name two chemical contaminants of water.
20. Which gas is produced due to incomplete combustion of fuels?
21. Name the chemical which is used for the purification of water.
22. What is Asthma?
23. What is air pollution? Which two diseases are caused due to air pollution?
24. Define potable water? Write the name of any two methods used for the purification of water.
25. What is ozone? How does it protect our environment?
26. What is the Greenhouse effect? How does it affect the atmosphere?
27. What is pollution?
28. What are pollutants?
29. Write the types of pollution.
30. Name any two air pollutants.
31. Name the main constituent gas of air.
32. Name two compounds which cause acid rains.
33. Write two examples of natural sources of air pollution.
34. Which of the following is responsible for the depletion of ozone layer?
    (a) Carbon dioxide(b) Carbon monoxide(c) CFCs (d) Sulphur dioxide
35. Name the phenomenon which causes global warming.
36. Name the factors which reduce the visibility in air.
37. Which of the following fuel is being used as the pollution free fuel?
    (a) CNG (b) Petrol(c) Kerosene(d) Diesel.
38. What is marble cancer?
39. How the presence of ozone in our environment helpful for us ?
40. What are the harmful effects of air pollution?
41. What do you understand by corrosion of Taj Mahal? 
42. What steps has the Supreme Court taken to save the Taj Mahal from air pollution?
43. What is the difference between pure air and polluted air?
44. What are the effects of global warming?
45. What is water pollution?
46. Name any two water pollutants.
47. Which Indian river is considered as one of the ten most polluted rivers in the world?
48. Name the plan which is implemented to save Ganga.
49. Name the elements which when released in water lead to toxicity in animals and plants.
50. Write the name of any two sources of water pollution.
51. What is potable water?
52. Name any two water borne diseases.
53. Write the name of any two methods used for the purification of water.
54. Which of the following chemicals is used for the purification of water?
55. Why hot water released by power plants considered as a pollutant?
56. How can you save water?
57. How does the increased level of nutrients in the water affect the survival of aquatic animals?
58. Name the type of filter generally used as household filter.
59. Name the physical properties we look for in drinking water?
60. Why hot water released by power plants considered as a pollutant?
61. Name the factors which pollute water.
62. What measures should be taken to control water pollution?