Q. Which of the following pairs of gases is the major cause of the greenhouse effect?
(a) CO2 and O3
(b) CO2 and CO
(c) CFC and SO2
(d) CO2 and N2O
Correct Answer: (d) CO2 and N2O
Q. Sewage treatment is primarily an
(a) physical process
(b) mechanical process
(c) chemical process
(d) biological process
Correct Answer: (d) biological process
Q. Which of the following is primarily produced by the activity of anaerobic bacteria on sewage?
(a) Laughing gas
(b) Propane
(c) Mustard gas
(d) Marsh gas
Correct Answer: (d) Marsh gas
Q. When did the Air Prevention and Control of Pollution Act come into effect?
(a) 1981
(b) 1985
(c) 1990
(d) 1975
Correct Answer: (a) 1981
Q. Relative Biological Effectiveness (RBE) refers to the damage caused by?
(a) Low temperature
(b) High temperature
(c) Encephalitis
(d) Radiation
Correct Answer: (d) Radiation
Q. Escherichia coli is used as an indicator organism to determine whether water is polluted with
(a) pollen of aquatic plants
(b) heavy metals
(c) faecal matter
(d) industrial effluents
Correct Answer: (c) faecal matter
Q. Which of the following is a pollution-related occupational health hazard?
(a) Pneumoconiosis
(b) Asthma
(c) Fluorosis
(d) Silicosis
Correct Answer: (d) Silicosis
Q. Which of the following organisms is used as an indicator of water quality?
(a) Chlorella
(b) Azospirillum
(c) Escherichia
(d) Biggiatoa
Correct Answer: (c) Escherichia
Q. Kyoto Protocol’s second commitment period was adopted in
(a) Cancun
(b) Durban
(c) Bali
(d) Doha
Correct Answer: (d) Doha
Q. What does the greenhouse effect refer to?
(a) cooling of the earth
(b) trapping of UV rays
(c) production of cereals
(d) warming of the earth
Correct Answer: (d) warming of the earth
Q. An atmospheric pollutant is
(a) 0.0034%
(b) 0.034%
(c) 0.34%
(d) 3.4%
Correct Answer: (b) 0.034%
Q. The main pollutant in the air is
(a) CO2
(b) CO
(c) N2
(d) Sulphur
Correct Answer: (b) CO
Q. Aerosols are particles in air, less than
(a) 2μ
(b) 4μ
(c) 3μ
(d) 1μ
Correct Answer: (d) 1μ
Q. Noise pollution occurs when noise exceeds
(a) 70-75 dB
(b) 50-60 dB
(c) 80-99 dB
(d) 40-65 dB
Correct Answer: (c) 80-99 dB
Q. Which pollution causes photochemical smog
(a) Soil
(b) Water
(c) Air
(d) Noise
Correct Answer: (c) Air
Q. Up to 80% of the total pollution in metropolitan areas comes from
(a) Pesticide
(b) Radioactivity
(c) Loudspeaker
(d) Automobiles
Correct Answer: (d) Automobiles
Q. Which of the following does not result in pollution?
(a) Thermal power project
(b) Steel power plant
(c) Automobiles
(d) Hydroelectric project
Correct Answer: (d) Hydroelectric project
Q. Which of the following pollutant is the most harmful?
(a) NO2
(b) CO2
(c) SO2
(d) CO
Correct Answer: (c) SO2
Q. Factor contributing to the greenhouse effect
(a) green trees in the house
(b) grasslands
(c) global warming
(d) greenery in the country
Correct Answer: (c) global warming
Q. What does deforestation cause?
(a) soil erosion
(b) loss of biodiversity
(c) disturbance in the hydrological cycle
(d) All of the above
Correct Answer: (d) All of the above
Q. What is reduced by eutrophication?
(a) dissolved CO2
(b) dissolved O2
(c) dissolved nutrients
(d) None of the above
Correct Answer: (b) dissolved O2
Q. Carbon monoxide (CO) is harmful to humans because?
(a) It forms carbolic acid
(b) It generates excess CO2
(c) It is carcinogenic
(d) It competes with O2 for haemoglobin
Correct Answer: (d) It competes with O2 for haemoglobin
Q. Acid rain is caused by an increase in the concentration of?
(a) SO2 and NO2
(b) CO and CO2
(c) CO and SO3
(d) O3 and dust
Correct Answer: (a) SO2 and NO2
Q. What undesirable changes do pollution cause in the following characteristics of air, water, land or soil?
(a) Physical
(b) Chemical
(c) Biological
(d) All of these
Correct Answer: (d) All of these
Q. Scrubbers are primarily used to remove the following gases from the exhaust after spraying water/ lime
(a) CO2
(b) SO2
(c) O2 & N2
(d) CO & CO2
Correct Answer: (b) SO2
Q. Volcanoes are _ source of pollution
(a) artificial
(b) natural
(c) Both (a) and (b)
(d) man-made
Correct Answer: (b) natural
Q. Fluorosis is carried by
(a) CO2
(b) Chlorine
(c) Nitrogen
(d) Water
Correct Answer: (d) Water
Q. Cause of gastrointestinal disturbance is
(a) Chromium
(b) Cadmium
(c) Sodium
(d) Selenium
Correct Answer: (d) Selenium
Q. The full form of B.O.D. is
(a) Biological organism death
(b) Biotic oxygen demand
(c) Biochemical oxygen demand
(d) Biological organisation day
Correct Answer: (c) Biochemical oxygen demand
Q. B.O.D. test of biological oxygen demand is used to measure
(a) Air pollution
(b) Water pollution
(c) Noise pollution
(d) Soil pollution
Correct Answer: (b) Water pollution
Q. Oxygen plays a significant role in a BOD test as it
(a) Destroy inorganic matter
(b) Destroy pollution
(c) Destroy waste organic matter
(d) None of these
Correct Answer: (c) Destroy waste organic matter
Q. The environment is heated by
(a) visible light
(b) UV rays
(c) infrared waves
(d) radiowaves
Correct Answer: (c) infrared waves
Q. As a result of global warming, sea levels will
(a) increase
(b) decrease
(c) remain the same
(d) None of these
Correct Answer: (a) increase
Q. The troposphere reflects what percentage of solar radiation into outer space?
(a) 10%
(b) 17%
(c) 34%
(d) 90%
Correct Answer: (c) 34%
Q. Organic substances found in the biosphere necessarily contain
(a) Silica
(b) Carbon
(c) Oxygen
(d) Nitrogen
Correct Answer: (b) Carbon
Q. The region that lies above the troposphere up to 50 km in distance is called
(a) Mesosphere
(b) Stratosphere
(c) Troposphere
(d) Thermosphere
Correct Answer: (b) Stratosphere
Q. If CO2 in the earth’s atmosphere disappears, the earth’s surface would
(a) Increase
(b) Decrease
(c) Depend on oxygen concentration
(d) Remain the same
Correct Answer: (b) Decrease
Q. Which of these has the least greenhouse effect?
(a) Carbon dioxide
(b) Nitrogen gas
(c) Water vapours
(d) Ozone
Correct Answer: (b) Nitrogen gas
Q. Gas produced by paddy fields and involved in global warming is
(a) Chlorine
(b) Methane
(c) CO2
(d) H2S
Correct Answer: (b) Methane
Q. Checking of re-radiating heat by atmospheric dust, O3, CO2 and water vapour is
(a) Ozone layer effect
(b) Solar effect
(c) Radioactive effect
(d) Greenhouse effect
Correct Answer: (d) Greenhouse effect
Q. Ozone is thicker at
(a) equator
(b) poles
(c) mountains
(d) sea
Correct Answer: (b) poles
Q. Among the following, which is not a greenhouse gas?
(a) O2
(b) CO2
(c) N2O
(d) CH4
Correct Answer: (a) O2
Q. The Montreal Protocol was called to examine the emission of
(a) e-wastes
(b) UV radiation
(c) CFCs
(d) All of these
Correct Answer: (c) CFCs
Q. Which of the following is not considered an atmosphere pollutant?
(a) CO2
(b) SO2
(c) Hydrogen
(d) CO
Correct Answer: (a) CO2
Q. The major aerosol pollutant in jet emissions is
(a) Sulphur dioxide
(b) Carbon monoxide
(c) Methane
(d) Fluorocarbon
Correct Answer: (d) Fluorocarbon
Q. The control of gaseous pollutants can be achieved by
(a) Arrestors
(b) Electrostatic precipitators
(c) Pyrolysis
(d) Adsorption
Correct Answer: (d) Adsorption
Q. Which one of the following acts as a secondary pollutant?
(a) Br2
(b) Cl2
(c) NO2
(d) HNO3
Correct Answer: (d) HNO3
Q. Identify the most efficient device to eliminate particulate matter from industrial emissions?
(a) Cyclonic separators
(b) Trajectory separators
(c) Incineration
(d) Electrostatic precipitator
Correct Answer: (d) Electrostatic precipitator
Q. Cleaning Environment with biological options such as microbes and plants are called
(a) Bioremediation
(b) Biotechnology
(c) Biowarfare
(d) Incineration
Correct Answer: (a) Bioremediation
Q. Extensive planting of trees is known as
(a) afforestation
(b) agroforestry
(c) deforestation
(d) social forestry
Correct Answer: (a) afforestation
Q. Appropriate measures to reduce overall greenhouse gas emissions are the commitments of the
(a) Montreal Protocol
(b) Environment Act
(c) Kyoto Protocol
(d) Earth Summit
Correct Answer: (c) Kyoto Protocol
Q. In India, jhum cultivation is practised in
(a) North-East states
(b) South–West coast
(c) South-East coast
(d) Gangetic plain
Correct Answer: (a) North-East states
Q. Ozone layer is formed in which zone of the atmosphere
(a) Mesosphere
(b) Stratosphere
(c) Troposphere
(d) Ionosphere
Correct Answer: (b) Stratosphere
Q. What gas in the atmosphere holds up ultraviolet rays?
(a) O2
(b) O3
(c) N2
(d) CH4
Correct Answer: (b) O3
Q. Polluted water is commonly represented by the following organisms:
(a) E. coli
(b) P. typhi
(c) Vibrio
(d) Entamoeba
Correct Answer: (a) E. coli
Q. Eggshell thinning in birds is caused by DDT because it inhibits
(a) calmodulin
(b) calcium ATPase
(c) magnesium ATPase
(d) carbonic anhydrase
Correct Answer: (b) calcium ATPase
Q. DDT is banned nowadays because it is
(a) Very costly
(b) Note available
(c) Inflammable
(d) Not degraded easily
Correct Answer: (d) Not degraded easily
Q. Which pollutant is non-degradable?
(a) Smoke
(b) Polythene
(c) Copper scraps
(d) Iron scraps
Correct Answer: (b) Polythene
Q. Fluoride pollution causes chlorosis or necrosis of
(a) Leaf margin and tip
(b) Stem
(c) All membrane systems
(d) Nucleus
Correct Answer: (a) Leaf margin and tip
Q. Radioactive pollutants have the following adverse effects:
(a) Gene mutation
(b) Hepatitis
(c) Polio
(d) T.B.
Correct Answer: (a) Gene mutation
Q. Non-biodegradable waste includes:
(a) DDT
(b) leather
(c) wool
(d) cotton
Correct Answer: (a) DDT
Q. The amount of fresh water on earth frozen as polar or glacial ice is
(a) 0.5 %
(b) 0.02 %
(c) 0.01%
(d) 1.97 %
Correct Answer: (d) 1.97 %
Q. DDT is a
(a) Non-biodegradable pollutant
(b) Biodegradable pollutant
(c) Antibiotics
(d) None of the above
Correct Answer: (a) Non-biodegradable pollutant
Q. Spraying DDT on crops causes pollution of
(a) Air only
(b) Air and soil only
(c) Air, soil and water
(d) Air and water only
Correct Answer: (c) Air, soil and water
Q. Excessive fertilizer discharge into water bodies results in
(a) Growth of fish
(b) Death of hydrophytes
(c) Eutrophication
(d) Silt
Correct Answer: (c) Eutrophication
Q. When a huge amount of sewage is dumped into a river, the BOD will
(a) Increase
(b) Remain unchanged
(c) Slightly decrease
(d) Decrease
Correct Answer: (a) Increase
Q. Which of the following is most likely to have the highest level of D.D.T. depositions in its body?
(a) Eel
(b) Crab
(c) Seagull
(d) Phytoplankton
Correct Answer: (c) Seagull
Q. The presence of frequent water blooms in a lake indicates
(a) Nutrient deficiency
(b) Oxygen deficiency
(c) Excessive nutrient availability
(d) Absence of herbivores in the lake
Correct Answer: (b) Oxygen deficiency
Q. By how much has the mean global temperature increased in the 20th century
(a) 0.2%
(b) 0.4%
(c) 0.6%
(d) 0.8%
Correct Answer: (c) 0.6%
Q. Deforestation results in
(a) Increased sunlight
(b) Increased grazing area
(c) Weed control
(d) Soil erosion
Correct Answer: (d) Soil erosion
Q. By removing the forest cover, which constituent of the atmosphere is likely to change?
(a) O2 level is increased
(b) CO2 level is increased
(c) O2 level significantly increases
(d) CO2 level is significantly decreased
Correct Answer: (b) CO2 level is increased
Q. Which of the following is not used to disinfect drinking water?
(a) Chlorine
(b) Ozone
(c) Chloramine
(d) Phenyl
Correct Answer: (d) Phenyl
Q. What is the BOD limit prescribed by the Central Pollution Control Board for the discharge of industrial and municipal wastewater into natural surface water?
(a) < 10 ppm
(b) < 100 ppm
(c) < 30 ppm
(d) < 3.0 ppm
Correct Answer: (a) < 10 ppm
Q. Pollution from photochemical smog does not contain
(a) Nitrogen dioxide
(b) Carbon dioxide
(c) PAN (peroxyacetyl nitrate)
(d) Ozone
Correct Answer: (b) Carbon dioxide
Q. The Montreal protocol, which calls for action to protect the ozone layer from human activities, was adopted in
(a) 1987
(b) 1988
(c) 1985
(d) 1986
Correct Answer: (a) 1987
Q. Electrostatic precipitators are installed in coal-fired power plants to control emissions of?
(a) NO×
(b) SPM
(c) CO
(d) SO2
Correct Answer: (b) SPM
Q. Bioindicators of water pollution cannot include which of the following?
(a) Blood-worms
(b) Stoneflies
(c) Sewage fungus
(d) Sludge-worms.
Correct Answer: (b) Stoneflies
Q. A global agreement on specific control strategies to reduce ozone-depleting substances has been adopted by?
(a) The Montreal Protocol
(b) The Kyoto Protocol
(c) The Vienna Convention
(d) Rio de Janeiro Conference
Correct Answer: (a) The Montreal Protocol
Q. Greenhouse gas concentrations are very high today because of?
(a) Use of refrigerator
(b) Increased combustion of oils and coal
(b) Deforestation
(d) All of the above
Correct Answer: (d) All of the above
Q. What plant species would you choose for the production of bioethanol?
(a) Zea mays
(b) Pongamia
(c) Jatropha
(d) Brassica
Correct Answer: (c) Jatropha
Q. As a biofuel substitute for fossil fuels, which of the following is being tried in India?
(a) Jatropha
(b) Azadirachta
(c) Musa
(d) Aegilops
Correct Answer: (a) Jatropha
Q. Where was the World Summit on Sustainable Development (2002) held?
(a) Brazil
(b) Sweden
(c) Argentina
(d) South Africa
Correct Answer: (d) South Africa
Q. Which of the following is a renewable exhaustible natural resource?
(a) coal
(b) petroleum
(c) minerals
(d) forest
Correct Answer: (d) forest
Q. dB is a standard abbreviation used for the quantitative expression of?
(a) the density of bacteria in a medium
(b) a particular pollutant
(c) the dominant Bacillus in a culture
(d) a certain pesticide
Correct Answer: (b) a particular pollutant
Q. What are the two gases contributing most to greenhouse gases?
(a) CO2 and CH4
(b) CH4 and N2O
(c) CFC and N2O
(d) CO2 and N2O
Correct Answer: (a) CO2 and CH4
Q. Where is “good ozone” found?
(a) mesosphere
(b) troposphere
(c) stratosphere
(d) ionosphere
Correct Answer: (c) stratosphere
Q. DDT residues are rapidly absorbed by the food chain and cause biomagnification because it is