Environmental biology
1. The emission of HC can be controlled by:
a) Recycling b) using high O₂ c) CO₂ d) a & b
2. __________ Particles are also a major cause of particulate pollution:
a) ash b) Dust c) smoke d) none of these
3. SO₂ irritates the respiratory tissues by combining with?
a) H₂O & O b) H₂O & S c) S & O₂ d) S + H₂O
4. The combination of fog & smoke is called?
a) Smog b) ash c) pollution d) all of these
5. The mixture of primary & secondary air pollutants produced:
a) Particulates b) Ozone c) Photochemical smog d) b & c
6. Unpolluted rain has acid pH
a) 6.7 b) 5.7 c) 7 d) 4.7
7. CO₂ & H₂O in the air react together to form:
a) Unpolluted air b) Carbonate c) Carbonic acid d) Acid rain
8. The major biological source of sulfur compounds:
a) Dimethyl sulfide b) Nitric sulfide c) Methyl sulfide d) Sulfur dioxide
9. The source of fixed nitrogen in rain water is:
a) Sulfuric acid b) Nitric acid c) NH₃ d) H₂SO₄
10. In the presence of water, sulfur trioxide is converted into
a) Sulfur dioxide b) Sulfuric acid c) Sulfur d) none of these
11. Many desirable fish species get eliminated at the pH of
a) 6 b) low 6 c) 5.5 d) 4.5
12. _______ pollution can cause death of trees & vegetation
a) NH₃ b) SO₂ c) SO₃ d) H₂SO₄
13. Acid rains increases the oxidation rate of:
a) Non Metals b) Metals c) a & b d) none of these
14. The first Global warming assessment was published in
a) 1982 b) 1974 c) 1970 d) 1980
15. The average temperature of earth has increased by
a) 0.3 to 0.6 °C b) 0.2 to 0.6 ° C c) 0.4 to 0.5 °C
16. The Sea level has risen from _________ in the last 100 years
a) 12-25 cm b) 10-25 cm c) 20-30 cm d) 10-20 cm
17. In 1997 CO₂ concentration is reached:
a) 315 ppm b) 360 ppm c) 367ppm d) 280ppm
18. According to Mauna Loa observing in Hawaii CO₂ concentration:
a) 400 ppm b) 367 ppm c) 340 ppm d) 390ppm
19. The Global warming potential is
a) 4,000 to 5,000 b) 4,000 to 8,000 c) 4,000 to 10,000 d) 3,000 to 6,000
20. _______ gas are used as insulting malteriq for high voltage equipment:
a) HFCs b) CFCs c) SF₆ d) None of these
21. Bacteria in the guts of animals release the gas:
a) Ethene b) Methane c) CO₂ d) O₂
22. The lifespan of methane in atmosphere is about
a) 8 years b) 6 years c) 10 years d) 12 years
23. _______ is 84 times more potent in GHG than CO₂
a) SF₆ b) HFCs c) Methane d) All of these
24. The global ozone layer has thinned over the last 10 years:
a) 2-3 % b) 3-5 % c) 5-8 % d) 2-4 %
25. The main cause of ozone depletion is
a) CFCs b) HFCs c) SF d) All of these
26. The ultra violet radiations are breaks
a) HFCs b) SF₆ c) CO₂ d) CFCs
27. In the destruction of ozone ________ act as catalysts
a) Fluorine b) chlorine c) Carbon d) CO
28. The basic unit of chlorofluoro carbons stay in the atmosphere
a) 50,000 years b) 40,000 years c) 30,000 years d) 15,000 years
29. The contaminants enter a water way from a single source is called:
a) Non-Point source b) Pont source c) a & b d) Emission
30. The leaching out of nitrogen from fertilized agricultural lands is:
a) NPs b) Point source c) a & b d) plastics
31. Gasoline, oils, plastics & pesticides are:
a) Inorganic b) Synthetic organic c) natural organic d) All
32. ________ can cause Eutrophication of water bodies:
a) Phosphorus b) Mercury c) Pesticide d) Lead
33. The inorganic pollutants are clean by a process:
a) Radioactive b) Depletion c) Phytoremediation d) Manufacturing
34. Water bodies have the lowest level of productivity is:
a) Mesotrophic b) Oligotrophic c) tropic d) Eutrophic
35. Water bodies have the highest level of biological productivity is:
a) Hypereutrophic b) Eutrophic c) Mesotrophic d) Oligotrophic
36. Hyper-Eutrophic lakes have a depth of:
a) 4 feet b) 3 feet c) 6 feet d) 5 feet
37. Hyper-Eutrophic lakes have a total amount of chlorophyll:
a) 20 micrograms b) 40mg/L c) 50mg/L d) 35mg/L
38. Eutrophication is derived from Greek word
a) Eutrophia b) Eutrophie c) Environ d) Eutrophin
39. The fungicides are taken through xylem vessels
a) Contact b) Translaminar c) Systemic d) a & b
40. Soil salinity is measured by
a) ECe b) EC c) a & b d) None of these
41. The upper & lower stratosphere contain ozone layer:
a) 12 - 20km b) 12 - 25km c) 10 - 30km d) 10 - 15km
42. The temperature on mesosphere:
a) -60 °C b) 200 °C c) -80 °C d) -100 °C
43. At thermosphere the loss of electron & become ionized called
a) Ionosphere b) Hydrosphere c) Aurora d) a, b & c
44. Biosphere exists about below the ocean surface
a) 500m b) 400km c) 250km d) 100km
45. Indigenous forests cover ________% of the earth land
a) 22% b) 21% c) 15% d) 10%
46. The Budyko-LettaU dryness ration for desert definition
a) D=R/(PxL) b) D=P/(RxL) c) D=L/(RxP) d) D=R/R(PxL)
47. The ratio of normal desert:
a) D < 2.3 b) D >= 3.4 c) D > 2.3 d) D>=10
48. Arid areas that are subject to sub-freezing conditions are known
a) Hot desert b) cold desert c) Fog desert d) a & c
49. Hot molted rock is found in liquid form below the hard solid is called
a) Lithosphere b) Hydrosphere c) Atmosphere d) Troposphere
50. Fossils are found in _______?
a) Igneous rock b) Sedimentary rocks c) Metamorphic rocks d) a & b
51. Each liter of ocean water contain salt
a) 35g b) 25g c) 10g d) 15g
52. An underground layer of porous rock containing water called:
a) Lithosphere b) Aquifer c) Igneous d) Metamorphic
53. Atmosphere contain the amount of N₂
a) 21% b) 72% c) 78% d) 0.04%
54. The gas molecules are reunites with electron this process is called
a) Aurora borealis b) Aurora c) Ionosphere d) Atmospheric
55. The major cause of air pollution
a) Thermal power b) open fires c) CO d) a & b
56. Primary air pollutants include:
a) CO b) Ozone c) CFS d) a & b
