This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 18 Pollution Of Air And Water ā Quiz 1 š Homepage š Download PDF Books š Premium PDF Books Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Drinking water can be made absolutely safe by adding some A) Aspirin tablets. B) Iodine tablets. C) Chlorine tablets. D) Chlorophyll 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) Air pollution. D) Soil pollution. Show Answer Correct Answer: C) Air pollution. 3. A thick fog-like layer in the atmosphere, especially during winters is called ..... A) Snow. B) Smog. C) Asthma. D) Smoke. Show Answer Correct Answer: B) Smog. 4. Allowing liquids to pass through, such as water through the ground A) Permeable. B) Pollution. C) Impermeable. D) Yup, you know it. Show Answer Correct Answer: A) Permeable. 5. ..... is a thick, brownish haze formed when certain gases in the air react with sunlight. A) Ozone. B) Photochemical smog. C) Carbon monoxide. D) Methane. Show Answer Correct Answer: B) Photochemical smog. 6. CHEMICALS IN FERTILIZERS DRAINED INTO WATER BODIES ARE CAUSING A) BACTERIAL GROWTH. B) GROWTH OF ALGAE. C) GROWTH OF BIRDS. D) GROWTH OF FISHES. Show Answer Correct Answer: B) GROWTH OF ALGAE. 7. Which gas emission from cars causes the formation of acid rain and photochemical smog? A) Carbon dioxide. B) Nitrogen oxide. C) Oxygen. D) Ozone. Show Answer Correct Answer: B) Nitrogen oxide. 8. In which country did the Minamata disease outbreak occur due to pollution? A) JAPAN. B) CHINA. C) INDIA. D) SOUTH KOREA. Show Answer Correct Answer: A) JAPAN. 9. Which of the following water is pH levels is best for Marine Organism? A) 1.0. B) 3.5. C) 8.0. D) 11.5. Show Answer Correct Answer: C) 8.0. 10. GLOBAL WARMING IS DUE TO AN EXCESSIVE EMISSION OF A) CARBON DIOXIDE. B) SULPHUR DIOXIDE. C) NITROGEN DIOXIDE. D) HYDROGEN PEROXIDE. Show Answer Correct Answer: A) CARBON DIOXIDE. 11. 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. 12. 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. 13. 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. 14. 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. 15. IN WHICH YEAR GANGA ACTION PLANE WAS LAUNCHED IN ..... A) 1985. B) 1986. C) 1984. D) 1987. Show Answer Correct Answer: A) 1985. 16. 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. 17. 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. 18. 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. 19. Which of the following are the sources of primary air pollutants in the USA? A) Automobiles, industry, oil drilling. B) Power plants, furniture repair shops, oil refineries. C) Industry, power generation, transportation. D) Chemicals in carpets, building materials, paints. Show Answer Correct Answer: C) Industry, power generation, transportation. 20. What does CFC damages? A) Oxygen content. B) Moon brightness. C) Sun brightness. D) Ozone layer. Show Answer Correct Answer: D) Ozone layer. 21. OZONE LAYER IS FOUND IN THE ..... LAYER OF THE ATMOSPHERE. A) TROPOSPHERE. B) MESOSPHERE. C) STRATOSPHERE. D) IONOSPHERE. Show Answer Correct Answer: C) STRATOSPHERE. 22. 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. 23. 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. 24. Water containing high salt concentration can be purified by A) Gases. B) Boiling. C) UV irradiation. D) None. Show Answer Correct Answer: B) Boiling. 25. 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. 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