1. Peeling of ozone umbrella is due to
a) CFCs b) PAN
c) CO2 d) Coal burning
2. DDT is
a) Biodegradable polulutant
b) Nondegradable pollutant
c) Not a pollutant
d) An antibiotic
3. Increasing skin cancer and high mutation rates are
a) Acid rain b) Ozone depletion
c) CO pollution d) CO2 pollution
4. Sewage water is purified by
a) Microorganisms b) Light
c) Fishes d) Aquatic plants
5. UV radiations bring about
a) Skin cancer b) Mouth cancer
c) Lung cancer d) Liver cancer
6. Which one is more toxic?
a) Carbon b) CO2
c) CO d) SO2
7. Soil salinity can be measured by
a) Conductivity meter b) Photometer
c) Protometer d) Potometer
8. Biodegradable pollutant is
| a) Plastic | b) Asbestos |
| c) Sewage 9. Lead is | d) Mercury |
| a) Air pollutant | b) Soil pollutant |
c) Radioactive pollutant d) Noise pollutant
11. Air pollution is not caused by
a) Pollen grains
b) Hydroelectric power
c) Industries and automobiles
12. CO is harmful for humans as it
a) Is carcinogenic
b) Is antogonistic to CO2
c) Has high affinity for heamoglobin than oxygen
d) Is destructive of O3
13. Disease caused by eating fish in water contaminated with industrial waste having mercury
a) Minamat disease b) Brights dieses
c) Hashmitos disease d) Arthritis
14. Drawbacks of DTT as pesticide is
a) It becomes ineffective after some time
b) It is less effective that others
c) It is not easily degrades in nature
d) its high cost
15. Fish die in water bodies polluted by sewage due to
a) Pathogens
b) Clogging of gills by silt
c) Reduction in oxygen
d) Foul smell
16. Drained sewage has BOD
a) More than that of water
b) Less than that of water
c) Equal to that of water
d) None of the above
17. Which one of the following forms a toxic substance by combining with hemoglobin in blood.
a) CO2 b) CO
c) O2 d) CH4
18. UV radiation from the sun causes a reaction that produces
a) Flourides b) CO
c) SO2 d) O3
19. The half of the atmosphere is concentrated in the lower ………km
a) 3.5 km b) 4.5 km
c) 5.6 km d) 10 km
20. Acid rain is due to increase ion atmospheric concentration of
a) Ozone and dust b) CO2 and CO
b) SO3 and CO d) SO2and NO2
21. Detergents are sodium salts of
a) Calcium suphonates
b) Barium sulphonates
c) Sodium carbonates
d) Benzene sulphonates
22. BOD is the amount of
a) Carbon dissoved in water
b) Amount of oxygen in water
c) Amount of bacteria in water
d) All of the above
23. The oxygen demand in water is determined by
a) Disulphate ion b) Dichromate ion
c) Bicarbonate ion d) Bidentate ion
24. Herbicides are used for removal of
a) Insects
b) Fungus on the plants
c) Undesited plants
d) Rodents
25. DDT is one of the most powerful
| a) Insecticide | | b) Herbicides |
| c) Fugicied | | d) Pastecide |
26. Most hazardous metal pollutant of automobiles exhaust is
a) Mercury b) Cadmium
c) Lead d) Copper
27. Photochemical smog is related to pollution of
a) Air b) Water
c) Soil d) Nostic
28. Environmental pollution affects
a) Biotic components
b) Plants only
c) Man only
d) Biotic and abiotic components of
environment
29. Ozone hole refers to
a) Hole in ozone layer
b) Reduction in thickness of ozone layer in stratosphere
c) Reduction of thickness of ozone layer in troposphere
d) Increase concentration of ozone
30. Eutrophication causes reduction in
a) Dissolved hydrogen b) Dissolved oxygen
c) Dissolved salts d) All of the above
31. The yellow color in photochemical smog is due to presence of_____
a) Carbon dioxide b) Nitrogen dioxide
c) Chlorine gas d) None
32. Which one of the following makes the bulk of hydrosphere’s content?
a) Oceans
b) Glaciers & ice
c) Fresh water lakes and ponds
d) All have equal distribution
32. Chlorination of water may be harmful if the water contains_______
a) Ammonia b) Dissolved oxygen
c) Carbon dioxide d) All
33. Which substance can be used for disinfection water?
a) KMnO4 b) Alums
c) Ozone d) All
34. Which statement is wrong?
a) The amount of ozone layer is greater in the region close to the equator.
b) Ozone acts as filter for UV radiations
c) In the polar region, it acts as pollutant
d) CFCs play effective role in removing O3 in the stratosphere.
35. Which of the following factors help to measure quality of water?
a) DO b) BOD
c) COD d) All of the above
36. In the purification of portable water, the coagulant used is_________
a) Alum b) Nickel sulphate
c) Copper sulphate d) Barium sulphate
37. Newspaper can be recycled again and again how many times?
a) 2 b) 3
c) 4 d) 5
38. The main pollutant of leather tanneries in the waste water is_______
a) Chromium III b) Chromium II
c) Sodium d) Copper
39. Which of the following air pollutants is quiet killer?
a) CO2 b) CO
c) NO2 d) N2O4
40. The outer part of the earth is present in
a) Lithosphere b) Hydrosphere
c) Biosphere d) Atmosphere
41. The components of lithosphere are
a) Soil
b) Mineral of earth crust
c) Organic matter of earth crust
d) All of these
42. The envelop of gases surrounding the earth’s surface which absorb most of the cosmic rays and maintain the balance is
a) Atmosphere b) Bio sphere
c) Hydrosphere d) Lithosphere
43. Ozone is located in
a) Troposphere b) Stratosphere
c) Mesosphere d) Thermosphere
44. Which fuel on combustion produces fumigative and sulphurous emission?
a) Coal b) Gasoline
c) Kerosene oil d) Diesel and furnace oil
45. The solid or liquid particles with diameter ranges from 0.01μ or less up to about 100 μ are
a) Aerosols b) Dust
c) Smoke d) All of these
46. The pollutants responsible for eye, nose, throat, bronchial tract and respiratory tract irritation are
a) H2S b) CO2
c) NH3 d) Both a & c
47. The air pollutant which is responsible for corrosion and erosion is
a) SO2 b) Carbon
c) Smoke d) Aerosol
48. Carbon and soot accelerate the corrosion and erosion due to
a) Acidic nature
b) Basic nature
c) Absorption or adsorption of the gaseous pollutant upon these particulars mater d) All of these
49. The pollutant which adhere to stones bricks and surface and cause fouling are
a) Smoke and dust
b) Smoke and aerosols
c) Aerosols and dust
d) None of these
50. Clean rain is
a) Basic b) Slightly basic
c) Slightly acidic d) All of these
51. The PH of neutral rain water is
a) 5.6 b) 4.6
c) 3.6 d) 2.6
52. The pollutant which play an important role in smog formation
a) CO b) NH3
c) H2S d) All of these
53. Photochemical smog is
a) Oxidizing smog b) Reducing smog
c) Neutral smog d) Smoke
54. Reducing smog is formed by the combination of
a) Smoke b) Fog
c) Dust d) Smoke & fog
55. The pollutant which results into ozone depletion is
a) CO b) NH3
c) H2S d) Freon
56. The photochemical smog is also called oxidizing smog which has high content of oxidant like
a) O3 b) SO2
c) NH3 d) All of these
57. Presence of heavy metals in water causes
a) Mental retardation b) Nervous disorder
c) Cancer d) All of these
58. Industrial waste water contains
a) Occluded & dissolved gases
b) Inorganic salts & organic compounds
c) Pathogens
d) All of these
59. Drinking water should have
a) Turbidity less than 10ppm
b) pH between 7 to 8.5
c) should be free from diseases causing bacteria
d) all of these
60. The concentration of dissolved molecular oxygen in pure drinking water is
a) 2 to 4ppm b) 3 to 4ppm
c) 4 to 8ppm d) 8 to 10ppm
61. The content of DO in polluted water is
a) Less than 4ppm b) 4ppm
c) 6ppm d) 8ppm
62. The COD (Chemical Oxygen Demand) of water can be determined directly by treating with
a) Dichromate ions b) Chloride ions
c) Oxide ions d) None of these
63. Water having high value of COD means the water is
a) Pure b) Dust
c) Aerosols d) Effluent
64. The techniques used to kill pathogens present in drinking water are
a) Chlorination b) Ozone
c) UV irradiation d) All of these
65. Pathogens present in polluted water can killed by chlorination but cannot remove
a) Viruses b) Taste
c) Odour d) All of these
66. The process in solid waste is burnt at high temperature ranging from 900 to 1000oC
a) Chlorination b) Ozonation
c) Incineration d) All of these
67. The chief pollutant which likely to deplete
ozone layer is
a) SO2 b) NH3
c) CO2 d) CF2Cl2
68. Which one of the following is not a component of environment?
a) Hydrosphere b) Lithosphere
c) Biosphere d) Stratosphere
69. The yellow color in photochemical smog is due
to presence of _______
a) Carbon dioxide b) Nitrogen dioxide
c) Chlorine gas d) None
70. Which statement is wrong?
a) The amount of ozone layer is greater in the region close to the equator.
b) Ozone acts as filter for UV radiations.
c) In the polar region, it acts as pollutants.
d) CFCs play effective role in removing O3 in the stratosphere.
71. In the purification of portable water, the
coagulant used is _______
a) Alum b) Nickel Sulphate
c) Copper sulphate d) Barium sulphate
72. The pH range of acid rain is
a) 5 – 7 b) 6 – 8
c) 6.5 – 7 d) Less than 5
73. The %age of SO2from Volcanic eruption is
a) 47 b) 57
c) 67 d) 77
74. Which layer consist of thick layer of ozone?
a) Stratosphere b) Thermosphere
c) Troposphere d) Mesosphere
75. Main reason of acid rain is
a) SO2 / CO2 b) NO2 / P2O5
c) SO2 / NO2 d) All
76. The thickness of ozone layer is
a) 25 to 50 km b) 25 to 28km
c) 3 km only d) 1 km only
