Page 1 : 1. Acid present in acid rain may be, 2. Which of the following is not a primary pollutant, , a.SO3, b. CO, c. NO, d. H2SO4, 3. Which of the following air pollutants is more dangerous for the ozone layer., a. CFC, b. CO2, c. CO, d. Oxides of nitrogen, 4. Which of the following gases is the main cause of acid rain?, a.CO, b. NO2, c. Both a & b, d. None of the above, 5. Which statement is wrong?, a. The amount of ozone layer is greater in the region close to the equator, b. Ozone acts as a filter for UV radiations, c. In the equatorial region, it acts as the pollutant, d. CFCs play an effective role in removing O3 in the stratosphere, 6. Which of the following factors help to measure the quality of water?, a. DO, b. BOD, c. COD, d. All of the above, 7. In the purification of potable water, the coagulant used is—, a. Alum, b. Nickel sulphate, c. Copper sulphate, d. Barium sulphate, 8. A single chlorine free radical can destroy how many ozone molecules?, a. 10, b. 100, c. 10000, d. 100000, 9. Which substance can be used for disinfecting water?, a.KMnO4, b Alums, c. Ozone, d. All

Page 2 : 10. Which one of the following makes the bulk of hydrosphere content?, a. Oceans, b.. Glaciers & icecaps, c. Freshwater lakes and ponds, d. All have equal distribution, 11. The main product of bacterial action is—, a. Nox, b. NO2, c. N2O3, d. NO, 12. Find out the incorrect sentence—, a. BOD of clear water is < 5 mg /Lit, b. PH of drinking water should be 6.5 to 8.5, c. C, S, and nitrogen oxide are the most widespread pollutants., d. DO value below 5.0 mg/Lit is favorable for healthy growth of fishes., 13. The excess of which ion in water causes blue baby syndromes—, a. Carbonate ions, b. Sulphate ions, c. Nitrate ions, d. Chloride ions, 14. The compound essential for the process of photosynthesis has this element, a. Ca, b. Na, c. K, d. mg, 15. Which of the following techniques is/are used in controlling water pollution?, , a. Reverse osmosis, b. Ion exchange process, c Adsorption process, d .All of these, 16. A substance which may alter environmental constituents or cause pollution is referred to, as—, a. Pollutant, b. Decomposer, c Radiator, e. Reducer, 17. Which of the following metal will pollute water?, a. Cd, b. Na, c. K

Page 3 : d. Mg, 18., , Which of the following pollutants cannot be degraded by natural process?, a Heavy metals, b DDT, c Nuclear waste, d .All of these, , 19. Constituent of lithosphere is –, a. polar ice caps, b. mantle, c. glacier, d. ground water, 20. Hydrosphere includes—, a. all types of water resources, b. mantle, c. lithosphere, d. biosphere, 21. Which of the following can be called contaminant, a.CO, b. Cl, c. SO2, d. Ar, 22. A mercuric salt is not as a deadly poison as dimethilmercury. This is an example of—, a. pollutant, b. contaminant, c. source, d. Speciation, 23. In B.O.D. measurement polluted water is allowed to undergo for 5 days--a. reduction, b. oxidation, c. source, d. Biodegradation, 24. Which of the following rivers is called the world’s most polluted river?, , a. Ganga River, b Chenab River, c Cauvery River, dYamuna River, 25. Which of the following are the primary causes of water pollution?

Page 4 : a. Plants, b. Animals, c. Human activities, d. None of these, 26. Which of the following statements are true about CNG -Compressed natural gas?, a. It is a clean fuel, b. It is a harmful fuel, c. It is a polluting fuel, d. All of the above, 27. Which of the following salts is the main cause of permanent hardness of water?, a. Magnesium sulphate, b. magnesium bicarbonate, c. Magnesium carbonate, d. None of the above, 28. Which of the following is mainly responsible for the causes of water pollution?, (a) Afforestation, (b) Oil refineries, (c) Paper factories, (d) Both b and c, 29. Chlorofluorocarbon are nonflammable chemicals mainly used in _________., (a) Perfumes, (b) Refrigerators, (c) Air conditioners, (d) All of the above, 30. Which of the following is a waterborne disease?, (a) Typhoid, (b) Cholera, (c) Diarrhoea, (d) All of the above, 31. The main sources of Arsenic in water are ________.

Page 5 : (a) Floods, (b) Fertilizers, (c) Industrial waste, (d) Both b and c, 32. Which of the following diseases or infections is caused due to poor water hygiene?, (a) Leprosy, (b) Trachoma, (c) Conjunctivitis, (d) All of the above, 33. Which of the following salts are the main causes of temporary hardness?, (a) Calcium sulphate, (b) Magnesium sulphate, (c) Magnesium chloride, (d) Magnesium carbonate, 34. Which of the following particles is called the particulate pollutants?, (a) Ozone, (b) Radon, (c) Fly Ash, (d) Ethylene, 35. Which of the following agents is responsible for turning the Taj Mahal yellow?, (a) Sulphur, (b) Chlorine, (c) Sulphur dioxide, (d) Nitrogen dioxide, 36. Which of the following statements is true about SMOG?, (a) SMOG is derived from the fog, (b) SMOG is derived from smoke, (c) SMOG is derived from water vapor, (d) SMOG is derived from both fog and smoke

Page 6 : 38. 10.Which of the following diseases are caused by smog?, (a) Rickets, (b) Bronchitis, (c) Breathing Problems, (d) All of the above, 39. DDT and Aluminum cans are examples of ________., (a) Primary Pollutants, (b) Secondary pollutants, (c) Biodegradable Pollutants, (d) Non-Biodegradable Pollutants, 40. Which of the following agents is mainly responsible for the secondary pollutants?, (a) Smog and Ozone, (b) Sulphur trioxide, (c) Nitrogen dioxide, (d) All of the above, 41. .Smoke, fumes, ash, dust, nitric oxide and sulphur dioxide are the main sources of, (a) Primary Pollutants, (b) Secondary pollutants, (c) Bio-Degradable Pollutants, (d) None of the above