Objective Type Questions Answers Environmental Science pdf | MCQ on Air Pollution
1. Major aerosol pollutant present in the jet plane emission is
(a) SO2
(b) Fluorocarbon
(c) CCI4
(d) CO
Ans. b
2. Environment planning organisation is
(a) CSIR
(b) NEERI
(c) ICAR
(d) CEPHERI
Ans. b
3. Acid rain occurs in areas where
(a) where large plantation occurs
(b) where small plantation occurs
(c) there are big industries and the atmosphere is polluted with SO2
(d) there are no industries
Ans. c
4. Fly ash is an environmental pollutant produced by
(a) thermal power plant
(b) oil refinery
(c) fertilisation plant
(d) strip mining
Ans. a
5. Greenhouse effect is enhanced in the environment by the gas
(a) CO2
(b) CO
(c) Fluorocarbons
(d) NO2
Ans. a
6. Which air pollutant could cause rains to be acidic?
(a) Dust particles from cement factories
(b) Insecticides from crop sprays
(c) Smoke from wood fires
(d) Sulphur dioxide from coal-fired powerstations
Ans. d
7. Acid precipitate kills fish by causing release of
(a) aluminum ions
(b) CO
(c) anticoagulants
(d) mercury
Ans. a
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8. CO is a pollutant because it
(a) inactivates nerves
(b) combines with oxygen
(c) combines with Hb
(d) inhibits growth
Ans. c
9. Pollutant causing leaf curling is
(a) SO2
(b) CO
(c) H2S
(d) O3
Ans. a
10. Which kind of powerstation produces sulphur dioxide, causing air pollution and acid rain?
(a) Coal-fired
(b) Nuclear
(c) Hydroelectric
(d) Wind-powered
Ans. a
11. Most hazardous metal pollutant of automobile exhaust is
(a) Cd
(b) Hg
(c) Cu
(d) Pb
Ans. b
12. Taj Mahal is threatened to the effect of
(a) CI
(b) SO2
(c) O2
(d) H2
Ans. b
13. The chemical that contributes to the destruction of ozone layer above the earth’s surface is
(a) Hg
(b) CO
(c) SO2
(d) CFCS
Ans. d
14. Photochemical smog always contains
(a) Al ions
(b) CH4
(c) O3
(d) P
Ans. c
15. Why does the oxygen concentration in the water decrease when sewage is discharged into a river?
(a) Decrease in the number of plants
(b) Increase in the number of fish
(c) Less oxygen absorbed from the air
(d) Rapid growth of bacteria
Ans. d
16. The most harmful types of environment pollutants are
(a) human organic wastes
(b) wastes from faecal
(c) non-biodegradable chemicals
(d) natural nutrients present in excess
Ans. c
17. Özone hole is the
(a) absence of O3 in troposphere
(b) absence of O3 in stratosphere
(c) deficiency of O3 in stratosphere
(d) deficiency of O3 in troposphere
Ans. c
18. Ozone day is observed on
(a) January 30
(b) April 29
(c) September 16
(d) December 25
Ans. c
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19. The main indicators of SO, pollution are
(a) lichens
(b) ferns
(c) algae
(d) bryophytes
Ans. a
20. Air pollution effects are usually found on the
(a) leaves
(b) flowers
(c) stems
(d) roots
Ans. a
21. If water pollution continue at its present rate, it will eventually
(a) stop the water cycle
(b) make O2 molecule unavailable to water plants
(c) make nitrate molecules unavailable to water plants
(d) prevent precipitate
Ans. b
22. Domestic waste is
(a) effluent
(b) biodegradable
(c) non-biodegradable
(d) air pollutant
Ans. b
23. Noise was recognised as an air pollutant through the amendment of
(a) Environment Protection Act
(b) Air Prevention and Control of Pollution Act
(c) Noise Control and Pollution Act
(d) All of the above
Ans. b
24. In addition to SO,, metals and textiles are damaged by
(a) nitrogen oxides
(b) fluorides
(c) carbon monoxide
(d) aldehydes
Ans. a
25. Lead pollution in Indian cities had been mainly due to
(a) lead pencils
(b) batteries
(c) automobiles
(d) electronic gadgets
Ans. c
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26. Classical smog was first observed in
(a) Tokyo
(b) New York
(c) Sydney
(d) London
Ans. b
27. Kyoto conference is concerned with
(a) limiting production of SO2
(b) developing alternatives to ODS (Ozone Depleting Substance)
(c) reduced emission of greenhouse gases
(d) reduction in use of energy
Ans. c
28. A pollutant is any substance, chemical or other factor that changes
(a) natural geochemical cycle
(b) the natural balance of our environment
(c) the natural flora of our environment
(d) the natural wildlife of our region
Ans. b
29. Which one of the following diseases not occurs due to contamination of water?
(a) Hepatitis-B
(b) Jaundice
(c) Cholera
(d) Typhoid
Ans. a
30. World’s most problematic aquatic weed is
(a) Azolla
(b) Woiffia
(c) Eichhornia
(d) Trapa
Ans. c
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31. Greenhouse gases
(a) absorb large wave radiations from the earth
(b) are transparent to both large and short
(c) absorb solar radiations for warming the atmosphere of earth
(d) are transparent to emissions from the earth for passage into outer space
Ans. a
32. The material generally used for sound proofing of rooms like a recording studio or auditorium, etc is
(a) cotton
(b) coir
(c) wood
(d) styro foam
Ans. d
33. Ozone is
(a) harmful in the upper atmosphere
(b) beneficial in the upper atmosphere
(c) beneficial in the lower atmosphere
(d) harmful in the upper atmosphere and beneficial in the lower atmosphere
Ans. b
34. A lake has been polluted by sewage, Compared with unpolluted water, the water in this lake will have
(a) tewer bacteria
(b) more fish
(c) more nitrogen compounds
(d) more oxygen
Ans. c
35. The most outstanding danger at present for the survival of living beings on earth is
(a) glaciation
(b) deforestation
(c) radiation hazards
(d) desertification
Ans. c
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36. If BOD of a river water is found to be very high. This means that the water is
(a) ciean
(b) highly polluted
(c) having algae
(d) contain dissolved minerals
Ans. b
37. BOD stands for
(a) Biotic Oxygen Demand
(b) Biological Organic Decay
(c) Biological Organism Death
(d) Biochemical Oxygen Demand
Ans. d
38. Chemical causing bone cancer and degeneration of tissues is
(a) I-131
(b) Ca -40
(c) l-127
(d) Sr-90
Ans. d
39. Contamination of radioactive materials are dangerous because it causes
(a) biological magnification
(b) gene mutation
(c) photochemical smog
(d) ozone destruction
Ans. b
40. The first biocide used on a large scale was
(a) DDT
(b) 2, 4-D
(c) mercury
(d) melathion
Ans. a
