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 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Drinking water can be made absolutely safe by adding some A) Iodine tablets. B) Chlorophyll tablets. C) Chlorine tablets. D) Aspirin tablets. Show Answer Correct Answer: C) Chlorine tablets. 2. The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is A) Noise pollution. B) Water pollution. C) Soil pollution. D) Air pollution. Show Answer Correct Answer: D) Air pollution. 3. A thick fog-like layer in the atmosphere, especially during winters is called ..... A) Asthma. B) Smoke. C) Snow. D) Smog. Show Answer Correct Answer: D) Smog. 4. Allowing liquids to pass through, such as water through the ground A) Yup, you know it. B) Impermeable. C) Pollution. D) Permeable. Show Answer Correct Answer: D) Permeable. 5. CHEMICALS IN FERTILIZERS DRAINED INTO WATER BODIES ARE CAUSING A) BACTERIAL GROWTH. B) GROWTH OF FISHES. C) GROWTH OF ALGAE. D) GROWTH OF BIRDS. Show Answer Correct Answer: C) GROWTH OF ALGAE. 6. Which gas emission from cars causes the formation of acid rain and photochemical smog? A) Ozone. B) Carbon dioxide. C) Oxygen. D) Nitrogen oxide. Show Answer Correct Answer: D) Nitrogen oxide. 7. In which country did the Minamata disease outbreak occur due to pollution? A) SOUTH KOREA. B) JAPAN. C) CHINA. D) INDIA. Show Answer Correct Answer: B) JAPAN. 8. Which of the following water is pH levels is best for Marine Organism? A) 1.0. B) 8.0. C) 11.5. D) 3.5. Show Answer Correct Answer: B) 8.0. 9. GLOBAL WARMING IS DUE TO AN EXCESSIVE EMISSION OF A) SULPHUR DIOXIDE. B) CARBON DIOXIDE. C) NITROGEN DIOXIDE. D) HYDROGEN PEROXIDE. Show Answer Correct Answer: B) CARBON DIOXIDE. 10. Acid rain mainly contains A) Sulphur dioxide and Nitrogen dioxide. B) Hydrochloric acid. C) Sodium chloride. D) Carbon tetra chloride. Show Answer Correct Answer: A) Sulphur dioxide and Nitrogen dioxide. 11. Release of which of the following gases is responsible for acid rain? A) Nitrogen dioxide. B) Water. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: A) Nitrogen dioxide. 12. The packaging of everyday food likes being done in plastic is harmful. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 13. Which action is recommended to prevent water pollution at an individual level? A) Disposing garbage in rivers. B) Overusing pesticides and fertilizers. C) Saving and not wasting water. D) Ignoring laws for industrial units. Show Answer Correct Answer: C) Saving and not wasting water. 14. IN WHICH YEAR GANGA ACTION PLANE WAS LAUNCHED IN ..... A) 1986. B) 1985. C) 1987. D) 1984. Show Answer Correct Answer: B) 1985. 15. Eutrophication is the result of soil pollution. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. Which of the following is a step you should take to reduce pollution? A) Using cloth bags instead of polythene ones. B) Segregating your waste. C) Growing more trees. D) All the above. Show Answer Correct Answer: D) All the above. 17. How does carbon monoxide affect the human body in a polluted environment? A) Increases oxygen carrying capacity. B) Decreases blood pressure. C) Combines with hemoglobin and decreases oxygen carrying capacity. D) Stimulates the immune system. Show Answer Correct Answer: C) Combines with hemoglobin and decreases oxygen carrying capacity. 18. Which of the following are the sources of primary air pollutants in the USA? A) Chemicals in carpets, building materials, paints. B) Power plants, furniture repair shops, oil refineries. C) Industry, power generation, transportation. D) Automobiles, industry, oil drilling. Show Answer Correct Answer: C) Industry, power generation, transportation. 19. What does CFC damages? A) Sun brightness. B) Moon brightness. C) Oxygen content. D) Ozone layer. Show Answer Correct Answer: D) Ozone layer. 20. OZONE LAYER IS FOUND IN THE ..... LAYER OF THE ATMOSPHERE. A) IONOSPHERE. B) STRATOSPHERE. C) TROPOSPHERE. D) MESOSPHERE. Show Answer Correct Answer: B) STRATOSPHERE. 21. Sea water is fit for: A) Drinking. B) Cooking. C) All of these. D) Washing. E) None of these. Show Answer Correct Answer: E) None of these. 22. THE SOLID OR LIQUID PARTICLES DISPERSED IN THE AIR ARE CALLED A) AEROSOLS. B) Aerosols. C) NONE OF THESE. D) BOTH (a) and (b). Show Answer Correct Answer: A) AEROSOLS. 23. Water containing high salt concentration can be purified by A) Gases. B) Boiling. C) UV irradiation. D) None. Show Answer Correct Answer: B) Boiling. 24. CARBON MONOXIDE IS A HARMFULL GAS A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 25. Which of the following in river is harmful to the aquatic animals and human beings? A) Sodium ions. B) Potassium ion. C) Heavy metal ions. D) Chloride ion. Show Answer Correct Answer: C) Heavy metal ions. 26. Bhopal tragedy was caused due to A) Water pollution. B) Leakage of poisonous gas. C) Air pollution. D) Emission of poisonous gas. Show Answer Correct Answer: B) Leakage of poisonous gas. 27. Which of the following is not a way to conserve water? A) Reduce. B) Replace. C) Recycle. D) Reuse. Show Answer Correct Answer: B) Replace. 28. How much percentage of earth is covered with water? A) 27%. B) 8%. C) 75%. D) 34%. Show Answer Correct Answer: C) 75%. 29. The contamination of water by undesirable substances is called A) Pollution. B) Air Pollution. C) Water Pollution. D) None of the above. Show Answer Correct Answer: C) Water Pollution. 30. If the vehicles registered in Delhi are lined up one after the other, the total length would be nearly equal to the combined lengths of the two longest rivers in the world, ..... and ..... A) Nile. B) Amazon. C) Both a and b. D) Brahmaputra. Show Answer Correct Answer: C) Both a and b. 31. When air is contaminated by unwanted substances which have a harmful effect on both the living and the non-living, it is referred to as ..... pollution. A) Air. B) Water. C) Soil. D) Sound. Show Answer Correct Answer: A) Air. 32. Which of the following method is suitable to clean water to make it fit for drinking? A) Candle type filter. B) Boiling. C) Chlorination. D) All of the above. Show Answer Correct Answer: D) All of the above. 33. Which of the following Chemicals cause pollution by damaging the Ozone layer? A) Hydrochlorofluorocarbons. B) Nitrogen oxides. C) Carbon dioxide. D) Chlorofluorocarbons. Show Answer Correct Answer: D) Chlorofluorocarbons. 34. THE SUBSTANCES, WHICH CONTAMINATE THE AIR, ARE CALLED ..... A) AIR COMPONENTS. B) AIR POLLUTANTS. C) AIR POLLUTION. D) POLLUTION. Show Answer Correct Answer: B) AIR POLLUTANTS. 35. Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called A) Wildlife week. B) Forest Conservation Day. C) Forest festival. D) Plantation month. Show Answer Correct Answer: C) Forest festival. 36. The harmful effects of water pollution are A) Water gets contaminated. B) Water borne diseases. C) Fishes and frogs die. D) All the above. Show Answer Correct Answer: D) All the above. 37. The Clean Air Act-regulates vehicle emissions. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 38. Which of the following is not a green house gas A) Carbon dioxide. B) Nitrous oxide. C) Methane. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 39. The gas used in refrigerating appliance causing serious damage to ozone is A) LPCS. B) CFCs. C) MFCs. D) DPCs. Show Answer Correct Answer: B) CFCs. 40. Liquids cannot pass through A) Permeable. B) Erosion. C) Impermeable. D) None of the above. Show Answer Correct Answer: C) Impermeable. 41. Metals that can be used as wire are ..... A) Metallic. B) Shiny. C) Malleable. D) Dukes. Show Answer Correct Answer: D) Dukes. 42. Most polluted river in the world is A) Ganga. B) Cavery. C) Yamuna. D) Chenab. Show Answer Correct Answer: A) Ganga. 43. Which of the following are used in electric water filters to kill all the harmful microorganisms present in tap water and make it absolutely fit for drinking A) Gamma radiation. B) Ultraviolet radiation. C) Visible radiation. D) Infrared radiation. Show Answer Correct Answer: B) Ultraviolet radiation. 44. Which of the following is a harmful effect of eutrophication? A) Increase in oxygen quantity in the water. B) Increase in nutrient content. C) Blocking of sunlight. D) None of the above. Show Answer Correct Answer: C) Blocking of sunlight. 45. THE OZONE LAYER PROTECTS US FROM THE BAD EFFECTS OF A) THE SUN'S UV RAYS. B) CARBON DIOXIDE. C) CFCs. D) ALL OF THESE. Show Answer Correct Answer: A) THE SUN'S UV RAYS. 46. Gases released from power plants mix with water vapor in the sky to make ..... A) Acid rain. B) Global warming. C) Smog. D) Particulate matter. Show Answer Correct Answer: A) Acid rain. 47. Incomplete combustion of fuelsuch as petrol and diesel gives A) Nitrogen dioxide. B) Sulphur dioxide. C) Carbon dioxide. D) Carbon monoxide. Show Answer Correct Answer: D) Carbon monoxide. 48. Which of the following is a reason a surgical mask is not effective in reducing the intake of particulate matter? A) There is no reason:the particles are too big to fit in the holes. B) The gaps in the mesh is not fine enough to prevent the small particles from entering in. C) The mask is made of the wrong material to prevent the particles from coming in. D) The method of the wearing the mask allows the particles to enter in. Show Answer Correct Answer: B) The gaps in the mesh is not fine enough to prevent the small particles from entering in. 49. ..... is produced from incomplete burning of fuels such as petrol and diesel. A) Carbon trioxide. B) Carbon monoxide. C) Carbon tetraoxide. D) Carbon dioxide. Show Answer Correct Answer: B) Carbon monoxide. 50. What percentage of the atmosphere is oxygen? A) 32%. B) 21%. C) 28%. D) 12%. Show Answer Correct Answer: B) 21%. 51. The substances which contaminate the ..... are called air pollutants. A) Sound. B) Water. C) Air. D) Soil. Show Answer Correct Answer: C) Air. 52. Name the oxide that smoke contains and combines with fog and other air pollutants to create smog. A) Oxides of nitrogen. B) Oxides of iron. C) Oxides of copper. D) Oxides of carbon. Show Answer Correct Answer: A) Oxides of nitrogen. 53. Why do we need fresh air? A) To stay healthy and carry out daily activities. B) So that our cars can work. C) If our air is fresh, our water is also fresh. D) None of the above. Show Answer Correct Answer: A) To stay healthy and carry out daily activities. 54. Water is pure and fit for drinking when it is ..... A) Free of impurities. B) Transparent. C) Treated with HCI. D) Looks clean. Show Answer Correct Answer: A) Free of impurities. 55. A chemical method for purifying water is called A) Chlorination. B) Galvanization. C) Boiling. D) Filtering. Show Answer Correct Answer: A) Chlorination. 56. Clear and Transparent water is always fit for drinking. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 57. Formula of Carboxyhaemoglobin? A) CohB. B) Cohb. C) COHb. D) COHB. Show Answer Correct Answer: C) COHb. 58. Ultra violets radiations are absorbed by ozone. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. Jaya cuts down trees to make billions of toothpicks. Jaya doesn't use toothpicks, she flosses. What is she destroying? A) Land pollution. B) Conservation. C) Natural resources. D) None of the above. Show Answer Correct Answer: C) Natural resources. 60. Discharge of treated industrial sewage into water bodies causes water pollution A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. Next →Related QuizzesScience QuizzesClass 8 QuizzesClass 8 Science Chapter 18 Pollution Of Air And Water Quiz 2Class 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