This quiz works best with JavaScript enabled. Home > Cbse > Class 8 > Science > Pollution Of Air And Water > Class 8 Science Chapter 18 Pollution Of Air And Water – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. WHICH GAS EXIST 21% IN ATMOSPHERE A) MONOXIED DIOXIDE. B) CARBON DIOXIDE. C) NITROGEN. D) OXYGEN. Show Answer Correct Answer: D) OXYGEN. 2. Burning leaves is a good method to dispose off unwanted dry leaves. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 3. Name the chemicals which are used in refrigerators, air conditioners, and damage the ozone layer when released into the air. A) CFCs. B) Silicone dioxide. C) LPG. D) CNG. Show Answer Correct Answer: A) CFCs. 4. Air pollution can result from ..... A) People farting. B) Transport. C) Volcanoes. D) None of the above. Show Answer Correct Answer: B) Transport. 5. Smog is made up of ..... and ..... A) Fog. B) Smoke. C) All of the above. D) None of the above. Show Answer Correct Answer: C) All of the above. 6. Measurements of carbon dioxide concentrations in the air taken over the past decade have shown a ..... A) Leveling off. (stopping the increase). B) Steady decline. C) Slow increase. D) Dramatic increase. Show Answer Correct Answer: D) Dramatic increase. 7. Marble cancer is caused by A) Bacteria. B) Acid rain. C) Alkali rain. D) Virus. Show Answer Correct Answer: B) Acid rain. 8. The wearing away of the earth's surface by water, wind or ice A) Ocean waves. B) River basin. C) Pollution. D) Erosion. Show Answer Correct Answer: D) Erosion. 9. One metric tonne is how many Kilograms? A) 1000. B) 100. C) 10. D) 10000. Show Answer Correct Answer: A) 1000. 10. The substances which contaminate theair are called ..... A) Water pollutants. B) Land pollutants. C) Air pollutants. D) All of the above. Show Answer Correct Answer: C) Air pollutants. 11. Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school? A) Scooter. B) School Bus. C) Autorickshaw. D) Car. Show Answer Correct Answer: B) School Bus. 12. First one to do Disinfect drinking? A) Isaac Newton. B) John Marcus. C) John L Leal. D) Magic in. Show Answer Correct Answer: C) John L Leal. 13. Which element is present in the exhaust of automobiles? A) Magnesium. B) Chromium. C) Lead. D) Calcium. Show Answer Correct Answer: C) Lead. 14. The Water which is safe for drinking is called A) Safe water. B) Distilled water. C) Mineral water. D) Potable water. Show Answer Correct Answer: D) Potable water. 15. True or False. Dust particles and gaseous chemicals from industrial wastes can cause air pollution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. WHAT IS THE SHORT FORM OF CLOROFLUOROCARBONS A) CFSC. B) CFS$_{C}$. C) CFC$_{S}$. D) CFCS. Show Answer Correct Answer: C) CFC$_{S}$. 17. Which of the following activities result in water pollution? A) Washing Clothes. B) Bathing. C) Brushing our teeth. D) All of the above. Show Answer Correct Answer: D) All of the above. 18. WHICH CHEMICAL DEMAGE THE OZONE LAYER MOST A) CLOROFLOROCARBONS. B) CHLOROFLUROCARBONS. C) CHLOROFLOROCARBONS. D) CLOROFLUOROCARBONS. Show Answer Correct Answer: C) CHLOROFLOROCARBONS. 19. ..... are a major source of gaseous pollutants like sulphur dioxide and nitrogen dioxide A) Mines. B) Vehicles. C) Oil refineries. D) Automobiles. Show Answer Correct Answer: C) Oil refineries. 20. Agricultural runoffs wastes examples? A) Cow dung. B) Hot water. C) Oil spills. D) Fertilisers. Show Answer Correct Answer: D) Fertilisers. 21. Small particles that is made up rocks, soil A) Water. B) River basin. C) Impermeable. D) Sediment. Show Answer Correct Answer: D) Sediment. 22. NAME THE DISEASES CAUSED BY WATER POLLUTION A) TYPHOID. B) CHOLERA. C) DIARRHOEA. D) ALL OF THESE. Show Answer Correct Answer: D) ALL OF THESE. 23. Which of the following is an objective of the Ganga Action Plan? A) Separate contaminated from uncontaminated water. B) Production of hydrogen for energy generation. C) Monitor the throwing of unburnt and half-burnt bodies into the river. D) Support of bathing and washing in the river. Show Answer Correct Answer: C) Monitor the throwing of unburnt and half-burnt bodies into the river. 24. The phenomenon of marble cancer is due to ..... A) Soil particles. B) Acid rain. C) CFCs. D) Will take. Show Answer Correct Answer: B) Acid rain. 25. CFCs are not used in air conditioners. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 26. When air is contaminatedby unwanted substances which havea harmful effect on both the living andthe non-living, it is referred to as ..... A) Noise pollution. B) Land pollution. C) Water pollution. D) Air pollution. Show Answer Correct Answer: D) Air pollution. 27. The following are sources of water in Singapore EXCEPT A) NEWater. B) Local catchment water. C) Imported water from Indonesia. D) Desalinated water. Show Answer Correct Answer: C) Imported water from Indonesia. 28. WHICH OF THE FOLLOWING IS USED IN DISINFECTING WATER? A) CHLORINE. B) OZONE. C) ULTRAVIOLET RAYS. D) ALL OF THESE. Show Answer Correct Answer: D) ALL OF THESE. 29. A chemical sprayed to kill insects or bugs. A) Aquifer. B) Pesticide. C) Herbicide. D) Fetilizer. Show Answer Correct Answer: B) Pesticide. 30. The water pollution caused by fertilizers in Agriculture increases the amount of oxygen in water bodies A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 31. Which of the following is major source of water pollution? A) Industrial wastes. B) Untreated sewage. C) Use of fertilisers. D) All of the above. Show Answer Correct Answer: D) All of the above. 32. Two metals extremely harmful for human beings are: A) Lead and silver. B) Good and silver. C) Mercury and lead. D) None of the above. Show Answer Correct Answer: C) Mercury and lead. 33. ..... IS A COMMONLY USED CHEMICAL METHOD FOR PURIFYING WATER A) CHLORINATION. B) SODIUM CARBONATE. C) SODIUM HYDROGEN CARBONATE. D) NONE OF THESE. Show Answer Correct Answer: A) CHLORINATION. 34. ..... are pollutants released into the air. A) Emissions. B) Hazardous wastes. C) Acid rains. D) Ozone molecules. Show Answer Correct Answer: A) Emissions. 35. Carbon monoxide gets mixed with oxygen and form A) Carbooxyhaemoglobin. B) Corbonoxyhemoglobin. C) Carboxyhaemoglobin. D) None of the above. Show Answer Correct Answer: C) Carboxyhaemoglobin. 36. The substance which contaminate the air is called air pollution A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 37. Runoffs from ..... from nearby farms is a source of water pollution. A) Rain. B) Industrial wastes. C) Sewage. D) Fertilisers and pesticides. Show Answer Correct Answer: D) Fertilisers and pesticides. 38. GANGA ACTION PLAN IS ASSOCIATED WITH REDUCE GANGA WATER POLLUTION A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 39. Which of the following was the cause of 'Bejing cough' in China? A) Lead. B) Smog. C) Acid rain. D) CFC. Show Answer Correct Answer: B) Smog. 40. Carbon monoxide is released from the combustion of fossil fuels. A) FALSE. B) TRUE. C) MAYBE. D) None of the above. Show Answer Correct Answer: A) FALSE. 41. Carbon monoxide is a poisonous gas. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. Which molecules combines with water vapour to form acid rain? A) Nitrogen & CO. B) Helium & SO$_{2}$. C) SO$_{2}$ & NO. D) Oxygen and Argon. Show Answer Correct Answer: C) SO$_{2}$ & NO. 43. What is a consequence of oxygen depletion during eutrophication? A) Increase in animals that eat surface plants. B) Death of fish. C) Death of plants under the surface. D) Excessive growth of plants on the surface. Show Answer Correct Answer: B) Death of fish. 44. Which of the following is NOT a method to reduce air pollution? A) Using alternative sources of energy such as coal and natural gas. B) Building factories away from the cities. C) Using unleaded petrol in vehicles. D) Afforestation. Show Answer Correct Answer: A) Using alternative sources of energy such as coal and natural gas. 45. WHAT RADIATION ARE ABSORBED BY CO$_{2}$ A) INFRARED RADIATION. B) Ultra veile radiation. C) GAMMA RADIATION. D) NONE OF THESE. Show Answer Correct Answer: A) INFRARED RADIATION. 46. Which of the following is not a pollutant unless present in excess? A) Nitrogen dioxide. B) Carbon dioxide. C) Sulphur dioxide. D) Carbon monoxide. Show Answer Correct Answer: B) Carbon dioxide. 47. Which of the following is a major contributor to air pollution? A) Domestic Sewage. B) Industrial Emissions. C) Thermal Pollution. D) None of the above. Show Answer Correct Answer: B) Industrial Emissions. 48. The water suitable for drinking by human beings is called A) Pollut water. B) Portable water. C) Clean water. D) Dirty water. Show Answer Correct Answer: B) Portable water. 49. Which of the following is NOT a disease caused by the effects of water pollution? A) Emphysema. B) Dysentery. C) Cholera. D) Typhoid. Show Answer Correct Answer: A) Emphysema. 50. Ozone layer protects us from harmful ..... rays of the sun. A) Infraviolet. B) Ultrared. C) Infrared. D) Ultraviolet. Show Answer Correct Answer: D) Ultraviolet. 51. Which of the following is a factor responsible for pollution of rivers? A) Washing clothes in the river. B) Releasing chemical waste in the river. C) Dumping household waste in the river. D) All of the above. Show Answer Correct Answer: D) All of the above. 52. What happens when Water becomes rich in nutrients? A) Growth of herbal plants. B) Eutrophication. C) Clean. D) Growth of fishes. Show Answer Correct Answer: B) Eutrophication. 53. Any unfavorable alteration of the environment may be called as. A) Bioaccumulation. B) Environmental pollution. C) Biomagnification. D) None of the above. Show Answer Correct Answer: B) Environmental pollution. 54. How can trash effect wildlife? A) Wildlife could eat trash that they think is food. B) Trash makes it hard for wildlife to camouflage. C) Wildlife animals cannot hunt prey because of the smell of garbage. D) Wildlife animals are afraid of trash. Show Answer Correct Answer: A) Wildlife could eat trash that they think is food. 55. The major pollutants of surface water are toxic and A) Poisonous wastes. B) Pollution. C) Gases. D) All the above. Show Answer Correct Answer: A) Poisonous wastes. 56. In the 1970's scientists began investigating the chemical reactions that caused the destruction of the ozone in the upper atmosphere. Which of the following was a result of their investigations? A) Plastic bags were invented as an alternative to paper bags. B) Global positioning technology was invented. (GPS). C) Alternatives to ozone depleting aerosols were invented because of the Montreal Protocol. D) Research on a reusable space shuttle was started. Show Answer Correct Answer: C) Alternatives to ozone depleting aerosols were invented because of the Montreal Protocol. 57. Over which of the following components of smog do humans have the LEAST control? (Which thing could humans have the least control over how much was in the air?) A) Water vapor (weather patterns, clouds). B) Sulfur dioxide (burning fossil fuels). C) Ammonia (natural decay/excretions from animals). D) Nitrogen oxides (car exhaust and burning fossil fuels). Show Answer Correct Answer: A) Water vapor (weather patterns, clouds). 58. Potable water is the water A) Obtained from lakes. B) Obtained from rivers. C) Pure and fit for drinking. D) Used for washing clothes. Show Answer Correct Answer: C) Pure and fit for drinking. 59. ..... is commonly used as coolants in refrigerators. A) Chlorofluorocarbons. B) Hydrogen chlorides. C) All the above. D) None of the above. Show Answer Correct Answer: A) Chlorofluorocarbons. 60. A pond contains clean water. Which of the following activities will produce the least pollution of water? A) Washing clothes in the pond. B) Washing motor vehicles in the pond. C) Swimming in the pond. D) None of the above. Show Answer Correct Answer: C) Swimming in the pond. ← PreviousNext →Related QuizzesScience QuizzesClass 8 QuizzesClass 8 Science Chapter 18 Pollution Of Air And Water Quiz 1Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 3Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books