Class 8 Science NCERT Exemplar Solutions Important MCQs of chapter 18 Pollution of Air and Water C
CHAPTER – 18 POLLUTION OF AIR AND WATER MULTIPLE CHOICE QUESTIONS 1. Air is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. This gas is (a) nitrogen (b) oxygen (c) ozone (d) argon 2. Which of the following is not a source of air pollution ? (a) automobile exhaust (b) burning of firewood (c) windmill (d) power plant 3. Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school ? (a) car (b) school bus (c) autorickshaw (d) scooter 4. Which of the following is not a way to conserve water ? (a) replace (b) reduce (c) reuse (d) recycle 5. The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is: (a) air pollution (b) water pollution (c) soil pollution (d) noise pollution 6. Incomplete combustion of fuel such as petrol and diesel gives (a) nitrogen oxide (b) sulphur dioxide (c) carbon monoxide (d) carbon dioxide 7. The phenomenon of marble cancer is due to (a) soot particles (b) CFCs (c) fog (d) acid rain 8. Potable water is the water which is (a) obtained from a river. (b) obtained from a lake. (c) pure and fit for drinking. (d) used only for washing clothes. 9. Which of the following procedures will give you water free from all impurities ? (a) adding chlorine tablets (b) distillation (c) boiling (d) filtration 10. A pond contains clean water. Which of the following activities will produce least pollution of water ? (a) washing clothes in the pond (b) animals bathing in the pond (c) washing motor vehicles in the pond (d) swimming in the pond. 11. 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) forest Conservation Day (b) plantation month (c) Van Mahotsav (d) wildlife week 12. Which of the following is not a greenhouse gas ? (a) nitrogen gas (b) water vapour (c) methane gas (d) carbon dioxide For Short Notes, Revision Notes And NCERT Solution. Visit Us at- www.kwatratuitioncenter.com
