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 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The substances that pollute water are called ..... A) Contaminants. B) Pollutants. C) Poisonous substance. D) None of the above. Show Answer Correct Answer: A) Contaminants. 2. When did Taj Mahal pollution start? A) 1983. B) 2000. C) 1992. D) 2012. Show Answer Correct Answer: A) 1983. 3. Boojhoo remembers seeing a thick fog-like layer in the atmosphere, especially during winters. This is smog which is made up of ..... and ..... A) Smoke. B) Fog. C) Both a and b. D) Only smog. Show Answer Correct Answer: C) Both a and b. 4. Climate change caused by extra carbon dioxide in the air that causes heat to get trapped in the atmosphere is called A) Global warming. B) Photosynthesis. C) Smog. D) None of the above. Show Answer Correct Answer: A) Global warming. 5. Conservation of water can be done by conserving the water cycle. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 6. The type of rain in which oxides of sulphur and nitrogen dissolve in the rain is called ..... A) Oxide rain. B) Sulphur and Nitrogen rain. C) Acid rain. D) None of the above. Show Answer Correct Answer: C) Acid rain. 7. The gradual downward flow of water that soaks into surface A) Erosion. B) Water uptake. C) Infiltration. D) River. Show Answer Correct Answer: C) Infiltration. 8. HOW DOES WINDMILLS WORK A) IT CONVERTS AIR INTO ELECTRCICTY. B) IT USES WATER TO MAKE ENERGY. C) IT CONVERTS WIND INTO ELECTRICITY. D) IT BURNS PETROLA DN DIESEL. Show Answer Correct Answer: C) IT CONVERTS WIND INTO ELECTRICITY. 9. When did Ganga action plan start? A) 1883. B) 1999. C) 2001. D) 1986. Show Answer Correct Answer: D) 1986. 10. What effect does the increased concentration of carbon dioxide have on atmospheric temperature? A) Decreases atmospheric temperature. B) Causes acid rain. C) Traps solar radiation and increases atmospheric temperature. D) Leads to ozone depletion. Show Answer Correct Answer: C) Traps solar radiation and increases atmospheric temperature. 11. Increasing levels of greenhouse gases like ..... are leading to global warming. A) Carbon tetraoxide. B) Carbon trioxide. C) Carbon dioxide. D) Carbon monoxide. Show Answer Correct Answer: C) Carbon dioxide. 12. Side effect if we breath carbon monoxide:reduced the oxygen-carrying capacity of the blood A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Which layer in the atmosphere protects us by absorbing harmful uitravaraint radiations of the sun. A) Oxygen. B) Ozone. C) Oxides. D) None of these. Show Answer Correct Answer: B) Ozone. 14. What fuel should the vehicle be using to cause minimum air pollution? A) Diesel. B) CNG. C) Petrol. D) None of the above. Show Answer Correct Answer: B) CNG. 15. Which is a step you could take to reduce your carbon footprint? A) Leave the water running when you brush your teeth. B) Recycle paper products and compost food wastes. C) Leaving the tv on at night after you fall asleep. D) Riding to school in a car. Show Answer Correct Answer: B) Recycle paper products and compost food wastes. 16. Lack of which of the following will kill you faster A) Soil. B) Water. C) Food. D) Air. Show Answer Correct Answer: D) Air. 17. The constituent of polluted air which contributes in producing acid rain is ..... A) Argon. B) Sulphur dioxide. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: B) Sulphur dioxide. 18. Smoke may contain oxides of ..... which combine with other air pollutants and fog to form smog. A) Hydrogen. B) Nitrous oxide. C) Nitrogen. D) None of the above. Show Answer Correct Answer: C) Nitrogen. 19. WHICH OF THE FOLLOWING DOES NOT CAUSE AIR POLLUTION? A) IRRIGATION. B) POWER PLANT. C) REFINERY. D) MINING. Show Answer Correct Answer: A) IRRIGATION. 20. Which of the following is NOT a coagulant used on water purification? A) Fluoride. B) Chlorine. C) Phosphate. D) Nitrite. Show Answer Correct Answer: D) Nitrite. 21. How can industrial effluent be treated to remove toxic substances? A) Chemical treatment. B) Adding chlorine tablets. C) Boiling. D) Filtration through muslin cloth. Show Answer Correct Answer: A) Chemical treatment. 22. How much amount of co2 is there in the atmosphere. A) 0.003. B) 100%. C) 0.3%. D) 0.00000003%. Show Answer Correct Answer: A) 0.003. 23. The pond contains clean water.Which of the activities will cause least water pollution A) Washing vehicles in the pond. B) Swimming in the pond. C) Washing clothes in the pond. D) Animals bathing in the pond. Show Answer Correct Answer: B) Swimming in the pond. 24. If we combine the two longest rivers in the world it will be equal to the registered vehicles in Delhi if they are lined up one after other. What is the name of the these rivers. A) Nile & Amazon rivers. B) Ganga & Nile rivers. C) Yamuna & Amazon rivers. D) Yellow & Amazon rivers. Show Answer Correct Answer: A) Nile & Amazon rivers. 25. Small particles of solids and liquids suspended in air ..... A) Pollutants. B) Particulates. C) Contaminants. D) None of the above. Show Answer Correct Answer: B) Particulates. 26. WHICH DIESEASES IS CAUSED BY AIR POLLUTION A) LUNG CANCER. B) Stroke. C) ASTHMA. D) ALL OF THESE. Show Answer Correct Answer: D) ALL OF THESE. 27. The most widely used solvent is A) Water. B) Acid. C) Nitrogen. D) Air. Show Answer Correct Answer: A) Water. 28. When untreated sewage and fertilisers wash into water, which process results? A) Bioaccumulation. B) Decomposition. C) Eutrophication. D) Biomagnification. Show Answer Correct Answer: C) Eutrophication. 29. Which gas is the major pollutant of air? A) Propane. B) Nitrogen. C) Carbon monoxide. D) Oxygen. Show Answer Correct Answer: C) Carbon monoxide. 30. Water shortages can be created by A) Human consumption. B) Weather related issues like drought. C) Human withdrawal. D) All of these reasons. Show Answer Correct Answer: D) All of these reasons. 31. Global Warming is caused due to high concentration of Carbon Dioxide A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 32. The increase in concentration of which gas is not responsible for Global Warming? A) Methane. B) Nitrogen. C) Sulphur dioxide. D) Carbon dioxide. Show Answer Correct Answer: B) Nitrogen. 33. When were the initiatives, Ganga Action Plan and National Mission For Clean Ganga launched respectively? A) 1984, 2017. B) 1985, 2016. C) 2001, 2019. D) 1947, 2009. Show Answer Correct Answer: B) 1985, 2016. 34. Scientists monitor ozone in the upper atmosphere and at ground level. Changing concentrations of each can cause health problems for people. Which set of changes would cause the MOST health concerns? A) An increase in both atmospheric and ground level ozone. B) A decrease in both atmospheric and ground level ozone. C) An increase in atmospheric ozone and a decrease in ground level ozone. D) A decrease in atmospheric ozone and an increase in ground level ozone. Show Answer Correct Answer: D) A decrease in atmospheric ozone and an increase in ground level ozone. 35. Why are scientists concerned with ozone depletion in the upper atmosphere? A) Because it causes greater levels of ground-level ozone. B) Because it allows ultraviolet radiation to reach Earth's surface. C) Because it increases the amount of smog in highly populated cities. D) Because it decreases global temperatures by decreasing incoming solar radiation. Show Answer Correct Answer: B) Because it allows ultraviolet radiation to reach Earth's surface. 36. Which of the following disease is not caused by drinking of river contaminated with untreated sewage A) Cholera. B) Diarrhea. C) Tuberculosis. D) Typhoid. Show Answer Correct Answer: C) Tuberculosis. 37. Water that is fit to drink is also referred to as A) Portable water. B) Potable Water. C) Edible water. D) None of the above. Show Answer Correct Answer: B) Potable Water. 38. Contaminated water and polluted water are the same. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 39. ..... % OF THE WORLD POPULATION IS WITHOUT SAFE DRINKING WATER. A) 11%. B) 25%. C) 29%. D) 21%. Show Answer Correct Answer: B) 25%. 40. What is the formula of ozone? A) O5. B) Be. C) O2. D) O10. Show Answer Correct Answer: B) Be. 41. WHAT DOES SPM STAND FOR:- A) Sodium, potasium, magnasium. B) SODIUM PARTICULATES MATTER. C) SOLLUTION PARTISEPATES MATTER. D) ALL OF THESE. Show Answer Correct Answer: B) SODIUM PARTICULATES MATTER. 42. Which of the following is not a source of air pollution? A) Power plant. B) Automobile exhaust. C) Windmill. D) Burning of firewood. Show Answer Correct Answer: C) Windmill. 43. EUTROPHICATION IS CAUSED DUE TO PRESENCE OF EXCESSIVE A) NITRATES IN WATER. B) PHOSPHATE IN WATER. C) OXYGEN IN WATER. D) BOTH A AND B. Show Answer Correct Answer: D) BOTH A AND B. 44. THE PHENOMENON OF MARBLE CANCERIS DUE TO A) SULPUR DIOXIDE. B) NITROGEN OXIDE. C) AIR CURRENTS. D) NONE OF THESE. Show Answer Correct Answer: D) NONE OF THESE. 45. CFC is also called ..... A) Cfc. B) Froen. C) Foners. D) Freons. Show Answer Correct Answer: D) Freons. 46. Drinking water has which of the following properties? A) Pollutants. B) No odour. C) Chemicals. D) Colour. Show Answer Correct Answer: B) No odour. 47. It is important to have clean water to ..... A) Be discharged to the reservoir. B) Drink and cool our body. C) Wash our cars. D) None of the above. Show Answer Correct Answer: B) Drink and cool our body. 48. Which is the gas produced from incomplete burning of fuels such as petrol and diesel? A) Carbon monoxide. B) Sulphur dioxide. C) CFCs. D) Carbon. Show Answer Correct Answer: A) Carbon monoxide. 49. What can cause heart strores? A) Carbon monoxide. B) Lead. C) Natural causes. D) SPM. Show Answer Correct Answer: B) Lead. 50. Water which is purified and fit for drinking is known as ..... water. A) Dirty water. B) Mud water. C) Pot water. D) Potable water. Show Answer Correct Answer: D) Potable water. 51. Many ..... problems are caused by air pollution A) Bone. B) Nervous. C) Respiratory. D) Digestive. Show Answer Correct Answer: C) Respiratory. 52. The phenomenon in which acid rain corrodes the marble of the monument is called ..... A) Heart Attack. B) Marble Cancer. C) Acid Cancer. D) Monument Cancer. Show Answer Correct Answer: B) Marble Cancer. 53. The combination of smoke and fog is called Smog. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 54. A commonly use chemical method for purifying water is A) Filtering. B) Boiling. C) Chlorination. D) None of these. Show Answer Correct Answer: C) Chlorination. 55. ..... is the process of removing the salt from ocean water. A) Decantation. B) Filtration. C) Distillation. D) Desalination. Show Answer Correct Answer: D) Desalination. 56. Carbon monoxide in vehicle exhaust causes A) Reduced Nitrogen carrying capacity of RBCs. B) Reduced carbon carrying capacity of RBCs. C) Reduced oxygen carrying capacity of RBCs. D) Increased oxygen carrying capacity of RBCs. Show Answer Correct Answer: C) Reduced oxygen carrying capacity of RBCs. 57. SO2, CO2and Nitrogen oxides are polluting gases. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 58. Smog is derived from which words? A) Smell and Fog. B) Smoke and Dust. C) Smoke and Fog. D) Smoke and Log. Show Answer Correct Answer: C) Smoke and Fog. 59. Which of the following is an activity that will reduce water pollution? A) Reusing water. B) Building rainwater harvesting systems. C) Disposing garbage properly. D) All of the above. Show Answer Correct Answer: D) All of the above. 60. Other kinds of pollutants are chlorofluorocarbons (CFCs) which are used in refrigerators, air conditioners and aerosol sprays A) Refrigerators. B) Air conditioner. C) Aerosol sprays. D) All the above. Show Answer Correct Answer: D) All the above. ← 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 2Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books