This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 18 Pollution Of Air And Water ā Quiz 5 š Homepage š Download PDF Books š Premium PDF Books Class 8 Science Chapter 18 Pollution Of Air And Water Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... are pollutants released into the air. A) Emissions. B) Ozone molecules. C) Hazardous wastes. D) Acid rains. Show Answer Correct Answer: A) Emissions. 2. 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. 3. 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. 4. 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. 5. 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. 6. Which of the following was the cause of 'Bejing cough' in China? A) CFC. B) Lead. C) Acid rain. D) Smog. Show Answer Correct Answer: D) Smog. 7. 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. 8. 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. 9. 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. 10. What is a consequence of oxygen depletion during eutrophication? A) Excessive growth of plants on the surface. B) Death of fish. C) Death of plants under the surface. D) Increase in animals that eat surface plants. Show Answer Correct Answer: B) Death of fish. 11. 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. 12. 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. 13. Which of the following is not a pollutant unless present in excess? A) Sulphur dioxide. B) Carbon dioxide. C) Carbon monoxide. D) Nitrogen dioxide. Show Answer Correct Answer: B) Carbon dioxide. 14. 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. 15. The water suitable for drinking by human beings is called A) Clean water. B) Dirty water. C) Portable water. D) Pollut water. Show Answer Correct Answer: C) Portable water. 16. Which of the following is NOT a disease caused by the effects of water pollution? A) Typhoid. B) Cholera. C) Emphysema. D) Dysentery. Show Answer Correct Answer: C) Emphysema. 17. Ozone layer protects us from harmful ..... rays of the sun. A) Infrared. B) Ultraviolet. C) Infraviolet. D) Ultrared. Show Answer Correct Answer: B) Ultraviolet. 18. 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. 19. What happens when Water becomes rich in nutrients? A) Clean. B) Growth of fishes. C) Eutrophication. D) Growth of herbal plants. Show Answer Correct Answer: C) Eutrophication. 20. 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. 21. How can trash effect wildlife? A) Wildlife animals cannot hunt prey because of the smell of garbage. B) Trash makes it hard for wildlife to camouflage. C) Wildlife could eat trash that they think is food. D) Wildlife animals are afraid of trash. Show Answer Correct Answer: C) Wildlife could eat trash that they think is food. 22. 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. 23. 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) Global positioning technology was invented. (GPS). B) Research on a reusable space shuttle was started. C) Alternatives to ozone depleting aerosols were invented because of the Montreal Protocol. D) Plastic bags were invented as an alternative to paper bags. Show Answer Correct Answer: C) Alternatives to ozone depleting aerosols were invented because of the Montreal Protocol. 24. ..... IS PRODUCED FROM INCOMPLETE BURNING OF FULE SUCH AS PETROL AND DIESEL A) CARBON MONOXIDE. B) CARBON SUBOXIDE. C) CARBON TRIOXIDE. D) NONE OF THESE. Show Answer Correct Answer: A) CARBON MONOXIDE. 25. 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). 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