Refer to NEET Biology Environmental Issues MCQs Set A provided below available for download in Pdf. The MCQ Questions for Full Syllabus Biology with answers are aligned as per the latest syllabus and exam pattern suggested by NEET, NCERT and KVS. Multiple Choice Questions for Environmental Issues are an important part of exams for Full Syllabus Biology and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for NEET Full Syllabus Biology and also download more latest study material for all subjects
MCQ for Full Syllabus Biology Environmental Issues
Full Syllabus Biology students should refer to the following multiple-choice questions with answers for Environmental Issues in Full Syllabus.
Environmental Issues MCQ Questions Full Syllabus Biology with Answers
IMPORTANT POINTS
Any undesirable changes in physical, chemical or biological characteristics of air, land or soil is called pollution. The substances which bring such changes are called pollutants.
Air pollution is mainly due to burning of fossil fuel like coal, petroleum, automobiles and industries. They are harmful to living organism and must be reduced. Unwanted sound creates noise pollution which can be controlled by reducing high intensity of sound.
Polluted water causes many diseases. Most common source of this is domestic waste and industrial effluents which reduce dissolved oxygen and increases BOD.Water pollutants rich in nutrients like nitrogen and phosphorus cause eutrophication thus induces excessive growth of aquatic plants.
Increasing concentration of nonbiodegradable toxic waste like DDT at various tropic level of food chain is known as biomagnifications.
Disposal of hazardous waste like Radioactive and e-waste requires additional efforts.
Agrochemicals like pesticides and fertilizers and plastic creates soil pollution.
Major environmental issues like green house effect and depletion of ozone layer in stratosphere is due to more emission of gases like CO2, CH4, CFCs and nitrous oxides and deforestation. This increases global temperature and brings drastic change in the atmosphere affecting living organisms. Depletion of ozone layer due to CFCs increases skin cancer, mutation and other disorders.
Government of India has introduced concept of Joint Forest Management to work closely with the local communities for protecting and managing forests.
To save ourforests and environment
Concept of Joint Forest Management has introduced by Govt of India helps in bringing forest personality and local communities to work jointly for protecting and managing forests.
1. Pollution is any undesirable change in physical, chemical and biological characteristics of.
(A) Land (B) Soil (C) Air and Water (D) All of these
2. To protect and improve the quality of our environment which act was passed and in Which year?
(A) The environment act 1986
(B) The environment act 1988
(C) The Air (Prevention and control of pollution) act 1981
(D) The Water (Prevention and control of pollution) act 1974
3. What is the effect of air pollution on living organisms?
(A) Reduce growth and yield of crops
(B) Cause premature death of plants
(C) Premature leaf fall
(D) Both A and B
4. Which gas is responsible for increase in atmospheric temperature?
(A) O2 (B)CO2 (C)SO2 (D)CO
5. 99% of SPM in the exhaust of thermal power plant can be separated by.. .
(A) Electrostatic precipitators (B) Solvents (C) Scrubber (D) Chimney
6. In an Electrostatic precipitators the velocity of air blown between the plates must be.
(A) Low (B) High (C) Moderate (D) Very high
7. The Scrubber is used to remove gases like___
(A)SO2 (B) NO2 (C) CO2 (D) SO3
8. Particulate matter of which size causes greatest harm to human health?
(A) 2.5 micrometer or less in diameter (B) More than 2.5 micrometer
(C) More than 3.5 micrometer (D) Less than 3.5 micrometer
9. Which type of damage can be caused by Particulate matter of 2.5 micrometer or less in diameter to human health?
(A)Breathing and respiratory symptoms (B) Inflammation and damage to lungs
(C) Premature death of an individual (D) All of these
10. Which is the main cause of atmospheric pollution in major cities?
(A) Industrialization (B) Noise
(C) Automobiles (D) Dust particles and SPM
11. Which catalyst should be fitted into filters in order to reduce emission of poisonous Gases?
(A)Selenium (B) Rhodium
(C) Magnesium (D) Manganese
12. Which metal is the main air pollutant in metro cities?
(A) Lead (B) Copper (C) Magnesium (D) Iron
13. Which catalyst converts unburnt hydrocarbons into CO2 and H2O?
(A) Platinum-Palladium (B) Platinum-Chloride
(C) Palladium- Chloride (D) Lead
14. What is the effect of catalytic converter on carbon monoxide and nitrogen oxide of exhaust?
(A) Converts them into CO2 andH2O
(B) Converts them into CO2 and Nitrogen gas
(C)Converts them into CO2 and NH4
(D) It converts them into CO2 and NO2
15. In which year noise was also included as an air pollutant?
(A) 1981 (B) 1987 (C) 1986 (D) 1984
16. Sound waves of_____ decibels causes damage to eardrum or permanently impair hearing?
(A) 150db or more (B) 120db or more (C) More than 80db (D) 110db
17. Which type of pollution causes altered breathing pattern, increased heartbeats and sleeplessness?
(A) Noise pollution (B) soil pollution
(C) Radioactive pollution (D) Thermal pollution
18. According to 1990s survey which city ranked 4th among the 41 most polluted cities of the world?
(A) Ankleshwar (B) Delhi (C) Japan (D) China
19. Name the metropolitan city leading the country in its levels of air pollution.
(A) Ankleshwar (B) Delhi (C) Chennai (D)Bangalore
20. Which is the drastic change seen in Delhi public transport after 2002?
(A) All the buses run by CNG (B) Use of unleaded petrol
(C) Use of LPG in buses (D) All the buses run by methanol
21. Which is correct according to EURO II norms?
(A) Sulphur can be controlled at 350ppm in diesel and 150ppm in petrol
(B) Sulphur can be controlled at 150ppm in petrol
(C) Lead can be controlled at 350ppm in diesel
(D) Lead can be controlled at 150ppm in petrol
22. Which harmless gases are produced by smokes stakes of thermal power plant and smelters?
(A) N2, O2 (B) CO2 (C) CO, N2 (D) SO2
23. For reducing vehicular pollution which measures are taken by Delhi government?
(A) Phasing out old vehicles
(B) Use of unleaded and low sulphur petrol and diesel
(C) Use of catalytic converter in vehicles
(D) All of these
24. In which cities Bharat stage II is applied from 1st april’2005?
(A) Delhi, Mumbai, Chennai, Baroda, Surat
(B) Delhi, Mumbai, Kanpur, Baroda, Surat
(C) Delhi, Mumbai, Chennai, Baroda, Pune
(D) Mumbai,Pune,Bangalore,Surat,Ahmedabad
25. A substantial fall in the level of which gases have been found between1997 to2005 in Delhi?
(A)CO2,SO2 (B) CO2,CO,SO2
(C) CO2,SO2 ,NO2 (D) CO2,CO,CFC
26. To safeguard our water resource the amendment was passed in the year.
(A) 1974 (B) 1981 (C) 1986 (D) 1987
27. Which chemical of petrol inactivates the catalysts of filter for reducing emission of poisonous gases?
(A) Lead (B) Rhodium (C) Straunsium (D) Iron
28. Which colloidal material is seen in domestic sewage?
(A)Sand and silt (B) Fecal material and bacteria
(C) Sodium and calcium (D) Phosphorus
29. What happens to the O2 level and BOD of river water at sewage discharge point?
(A) Sharp decline in O2 level and rise in BOD
(B) O2 level and BOD both increases
(C)No change in BOD but O2 level increases
(D) No change in O2 level but BOD increases
30. What is the reason for mortality of fish in water body?
(A) Biodegradation of organic matter by microbes
(B) Due to algal bloom
(C)Due to decrease in BOD
(D) a and b both
31. Which plant is known as ‘Terror of Bengal’?
(A) Chara (B) Wulffia (C)Hydrilla (D)Eichhornia
32. Which is world’s most problematic aquatic weed?
(A) Chara (B)Wulffia (C) Hydrilla (D) Eichhornia
33. Which compound used in refrigerator is a source of chlorine
(A) Freon (B) HFC (C) BHC (D) None
34. What is biological magnification of DDT in large size fish eating birds?
(A) 25ppb (B)25ppm (C)2.5ppm (D)0.25ppm
35. By which method large number of particles of pollutants are separated?
(A) Cyclone collector (B) Porous filter
(C) Electrostatic precipitator (D) By using solvent
36. Which of the following is not responsible for pollution?
(A) Wood (B) SO2 (C) Unsaturated carbon (D) Solar energy
37. The population of eagles and hawks is declining because of,
(A) Food scarcity
(B) game lovers
(C) Harmful effects of pesticides
(D) Very few dead animals are found in fields
38. BOD of a river was found to be very low, this means the water
(A)Was clean (B) Was polluted
(C) Contains algae (D)Contains other dissolved minerals
39. More pollution loads in lake, no self purification because.
(A) There is no O2 to sustain microbial activity
(B) No sunlight available
(C) Microbes die
(D) Pollutants settles down at the bottom
40. Warmth on the surface of the earth is due to
(A) Solar radiation (B) Green house effect (C) Geothermal energy (D) All above
41. Thinning of eggshell and their premature breaking is due to
(A) Eutrophication (B) Global warming
(C) Green house effect (D) Biological magnification
42. Aging of lake is accelerated by
(A) Cultural Eutrophication (B) Biological magnification
(C) Biological accumulation (D) Algal bloom
43. Which chemicals increase growth of aquatic organism?
(A)Nitrogen and phosphorus (B) Calcium and iron
(C) Nitrogen and calcium (D) Nitrogen and iron
44. Arrange the following statements with reference to accelerated eutrophication in proper manner.
(p) Silt and debris pile up at the bottom of the lake
(q) Marsh plants take roots in the shallows begin to fill the lake basin
(r) Introduction of large number of nitrogen and phosphate in the pond
(s) Encouragement of growth of aquatic organisms.
(A) p,q,r,s, (B) r,s,q,p (C) r,s,p,q (D) s,r,p,q
45. Give full form of FOAM.
(A)Friends of Arcata Marsh (B) Friends of Arctic Marsh
(C) Friends of Antarctic Marsh (D) Foam of Arcata Marsh
46. In which cities Ecosan toilets are working?
(A)Kerala and Srilanka (B) Shrinagar and Kerala
(C) Kullu and Srilanka (D) Tamilnadu and Kerala
47. Recycling of e-waste is done in developing countries like_
(A)China, India, Pakistan (B) India, Pakistan Shrilanka
(C)China, Pakistan, Bangaladesh (D) China, India, Shrilanka
48. Name the metals recovered during recycling process of e-waste.
(A) Gold, Nickle, Copper, Silicon (B) Gold, Copper, Silver, Magnecium
(C) Gold, Silver, Copper, Selenium (D) Nickle, Copper, Silicon Silver
49. Increase in the concentration of a nonbiodegradable substance of various tropic level is called
(A) Eutrophication (B) Global warming
(C) Biological bloom (D) Biological magnification
50. Deforestation results in
(A) Change in climatic condition (B) Reduce rain fall
(C) Loss of biodiversity (D) All of these
51. Chipko movement is associated with prevention of
(A) Air pollution (B) Cutting of trees
(C) River pollution (D) Construction of dams
52. Jhum refers to.
(A) Crop Cultivation (B) Social forestry
(C) Shifting cultivation (D) Large scale agriculture
53. Ultraviolet radiation from sunlight causes a reaction that produces
(A) Fluorides (B) CO (C) SO2 (D) Ozone
54. The biological amplification of DDT in various tropic levels is known as
(A) Eutrophication (B) Global warming
(C) Biological bloom (D) Biological magnification
55. BOD is related to
(A) Detergents (B ) Inorganic pollutants
(C) Organic pollutants (D) Organophosphorus
56. CFC’s splits up in stratosphere to release chlorine by the action of__
(A) UVA (B) UVB (C) UVC (D) All of these
57. Noise was recognized as air pollutant through amendment of
(A) Environment act (B) the air act (C) Noise act (D) All of above
58. If there was no CO2 in the earth’s atmosphere, the temperature of earth’s surface would be.
(A) Dependent on amount of O2 in the atmosphere
(B) Higher than present
(C) Less than present
(D) The same
59. With the help of Electrostatic precipitators how much particulate pollutants can be removed?
(A) 50% (B)99% (C) 40% (D)100%
60. Enrichment of a water body with organic waste results in sudden algal bloom. This phenomenon is known as
(A) Eutrophication (B) Aqua bloom
(C) Biological bloom (D) Biological magnification
61. Which of the following is mismatched?
(A)Fossil fuel burning - Release of CO2
(B) Nuclear power station - Radioactive waste
(C) Solar energy – Green house effect
(D) Biomass combustion – Release of CH4
62. Which of the following is not causing pollution?
(A) Thermal power plant (B) Nuclear power plant
(C) Automobiles (D)Hydroelectric power plant
63. Soil conservation can be best achieved by having___
(A)Wind screen (B) Good plant cover
(C) Restricted human activity (D) Low rain fall
64. Biological treatment of water pollution can be done by
(A) Lichens (B) Phytoplankton (C) Algae (D) None of these
65. Eichornia is a___
(A) Desert plant (B) Water plant (C) Terrestrial plant (D) Parasitic plant
66. Who created the Haryana Welfare Club?
(A) Ramesh Dagar (B) Sunderlal Bahuguna (C) Ahmad Khan (D) Suresh Dagar
67. What is the major problem of using nuclear energy?
(A) Accidental leakage (B)It is very costly (C)Safe Disposal (D)Both A and C
68. Which is the recommended depth to burry nuclear waste?
(A) 500mts (B) 5000mts (C) 600mts (D) 50mts
69. Name the natural phenomenon responsible for heating of earth’s surface and atmosphere?
(A) Global warming (B)Green house effect (C) Eutrophication (D) Aforestation
70. What is the average temperature of earth maintained by green house effect?
(A) 15°c (B) 18°c (C) 25°c (D) 30°c
71. In which form earth ‘s surface reemits heat?
(A) UV radiation (B)Infrared radiation (C) Gamma rays (D) α and β rays
72. Which gases are commonly known as green house gases?
(A) CO2 & CH4 (B) CO2 & NH4 (C)CO & N2 (D) NH4, CO ,SO2
73. What is correct for the region labeled as a,b,c and d?
(A) a- CO2 60% ,b- CH4 20% , c- CFC 14% ,d-N2O 6%
(B) a- CFC60% ,b- CH4 20% , c- CO2 14% ,d-N2O 6%
(C) a- CFC60% ,b- CO2 20% , c- CH4 14% ,d-N2O 6%
(D) a- CFC60% ,b- CH4 20% , c- N2O 14% ,d- CO2 6%
74. In the given chart of biological magnification what does a and b indicate?
Fish eating birds-DDT -25ppm
(A) a=phytoplanktons,b=insects eating bird
(B) a= Zooplanktons , b=large fish
Small fish-DDT - 0.5ppm
(c) a=DDT-0.03ppm,b=DDT-2ppm
(D)a=DDT-0.04ppb,b-DDT-2ppb
Water- DDT -0.0003ppm
75. Name the disease caused by water pollution?
(A)Polio (B) Typhoid (C) Tuberculosis (D)Leprosy
76. Which disease is not caused by water pollution?
(A)Cholera (B)Typhoid (C)Tuberculosis (D)Dysentery
77. Which is the main pollutant content of domestic sewage?
(A) Biodegradable organic matter (B) Biodegradable inorganic matter
(C) Flurohydro carbons (D) Dissolve salts
78. What I the result of El Nino Effect?
(A) Melting of polar icecaps (B) Rise in sea level
(C) Melting of Himalayan snow caps (D) All of these
79. What are the reasons for soil erosion and desertification?
(A) Over cultivation (B) Unrestricted grazing
(C) Deforestation (D) All of these
80. Heavy metals can be defined as elements with density___
(A)>5g/cm3 (B) <5g/cm3 (C) <5g/m3 (D) >5g/cm3
81. What should be the forest cover recommended by National forest policy1988?
(A) 30% in plains and 76% in hills (B)33% in plains and 67% in hills
(C) 35% in plains and 76% in hills (D) 22% in plains and 70%in hills
82. Name the community known for its peaceful coexistence with nature?
(A) Bishnoi (B)Bikaneries (C)Krishnoi (D) Jhodhapuries
83. Bad ozone is formed in____layer of atmosphere ?
(A) Troposphere (B)Stratosphere (C)Thermosphere (D)Ozonosphere
84. What is snow blindness?
(A) Can not see due to Cataract
(B) Cannot see in the snow
(C) Inflammation of cornea
(D) Inflammation of eyeball
85. Which atoms are released by the action of UV rays on CFC?
(A)O (B)C (C) Fl (D) Cl
86. In which part of atmosphere degradation of ozone takes place?
(A)Troposphere (B) Stratosphere (C) Thermosphere (D) Ozonosphere
87. Measurement of ozone layer is done by____unit.
(A)Du (B) Db (C) Ds (D) dv
88. Formation of ozone gas in upper layer depends on
(A) U V rays (B)Infrared (C)gamma rays (D) α rays.
89. In the water of flooded river what type of change is seen in BOD?
(A)Increases (B) Decreases (C) Remains same (D) Drastic decrease
90. The death of fishes due to Eutrophication is because of
(A) Increase O2 content (B) Decrease CO2 content
(C)Decrease O2 content (D) ) Increase CO2 content
91. When huge amount of sewage is dumped in a river the BOD will
(A) Increases (B) Decreases (C) Remains same (D) Drastic decrease
92. The Montreal protocol was made effective from___
(A)1987 (B)1989 (C)1976 (D)1986
93. What do you understand by greenhouse effect?
(A)Increase in temperature due to increase in O2 concentration of the atmosphere
(B) Decrease in temperature due to decrease in O2 concentration of the atmosphere
(C) Increase in temperature due to increase in CO2 concentration of the atmosphere
(D) Decrease in temperature due to decrease in CO2 concentration of the atmosphere
94. In which sphere of atmosphere the ozone layer is seen?
(A) Troposphere (B) Stratosphere (C) Homosphere (D) Thermosphere
95. The release of phosphates and nitrates in lakes and ponds leads to
(A) Reduce algal growth (B) Eutrophication
(c) Nutrient enrichment (D) Both B and C
96. Deforestation has an alarming effect on
(A) Soil erosion (B) increase in grazing area (C) weed control (D) All of these
97. Amruta Devi Bishnoi Wild life Protection award has recently instituted for
(A)Extraordinary courage and dedication in protecting wildlife
(B) Extraordinary courage and dedication in protecting plants
(C) Extraordinary courage and dedication in protecting wild animals
(D) Extraordinary courage and dedication in Protecting Environment
98. Which is the main factor of water pollution?
(A)Ammonia (B) Smog (C) detergents (D) None of these
99. Which one of these has highest levels of DDT deposition?
(A)Eel (B) Phytoplankton’s (C) Sea gull, Eagle (D) Crab
100. Exhaust of motor vehicles produces pollutants like
(A) CO (B) Hydrocarbons (C) SO2 (D) All of these
101. The stress reaction is caused by
(A)Air pollution (B) Nuclear pollution (C) Water pollution (D) Noise pollution
102. Deforestation may reduce the chances of____
(A)Rain fall (B) Frequent cyclones
(C) Erosion of surface soil (D) Frequent landslide
103. Most severe environmental hazard to mankind is due to___
(A)Air pollution (B) Radioactive pollution
(C) Water pollution (D) Noise pollution
104. Which is biodegradable pollutant?
(A)Mercury salts (B) Polythene bags (C) Domestic sewage (D) Aluminum canes
105. According to government of India’s new policy what should be the level of aromatic hydrocarbons of the concerned fuel?
(A)40% (B)30% (C)42% (D)35%
106. What would have been the temperature of the earth without green house effect?
(A) -15° C (B) -28° C (C) -18°C (D) -10°C
107. Which is the native place of Bishnoi community?
(A)Bikaner (B) Jodhpur (C) Jamshedpur (D)Jaipur
108. Formation of ozone hole is maximum over. .
(A) Antarctica (B) Europe (C) Africa (D) India
109. The main problem arose due to green revolution is___
(A)Over production of food (B) Water logging
(C) Soil salinity (D) Both B and C
110. What is importance of catalytic converter?
(A)They increases average of the vehicles
(B) They reduces emission of harmful gases
(C) They convert CO and nitric oxide into CO2 and H2O
(D) Both B and C
111. With the help of ____ SO2 is removed from the industrial exhaust?
(A) Electrostatic precipitators (B) Solvents
(C) Scrubber (D) None of these
112. How much forest area is lost in tropics and temperate regions respectively?
(A) 40%, 1% (B) 1%, 40%
(C) 33%,40% (D)40$,33%
113. What is the rise in the temperature of earth since last three decades?
(A) 0.6° C (B) 0.5° (C) 6°C (D) 5°C
114. How can we control global warming?
(A) By reducing the use of fossil fuel
(B) Aforestation
(C) By slowing down the growth of human population
(D) All of these
115. What is the present scenario of deforestation in India as compared to beginning of twentieth century?
(A) Beginning of twentieth century 30%, now 19.4%
(B) Beginning of twentieth century 30% ,now 18.4%
(C) Beginning of twentieth century 33%, now 19.4%
(D) Beginning of twentieth century 23%, now 16.4%
116. What should be the forest cover recommended by National Forest policy (1988)?
(A) 33% for the plains, 67%for the hills
(B) 40% for the plains, 60%for the hills
(C) 24% for the plains, 76%for the hills
(D) 23% for the plains, 77%for the hills
117. Ozone depletion in the stratosphere will cause .
(A) Increased incidence of skin cancer (B) Forest fire
(C) Global warming (D) None of these
118. Eutrophicatico causes decrease in___
(A)Dissolved oxygen (B) Dissolved salts
(C) Dissolved hydrogen (D) All of these
119. Green house effect is caused by____
(A)Green plants (B) Infra red rays
(C)Uv rays (D)X-rays
120. Ozone hole refers to____
(A) Reduction in thickness of ozone layer in troposphere
(B) Reduction in thickness of ozone layer in stratosphere
(C) Hole in ozone layer in stratosphere
(D) Increased concentration of ozone
121. Green house effect is due to____
(A) Higher CO2 concentration (B) Absorption of infrared rays by gases & dust particles
(C) Ratification of atmosphere (D) Both B & C
122. As it travels along the food chain the concentration of DDT.
(A)Increases (B) Stays constant
(C) Decreases (D) Fluctuates randomly.
123. Reason for ozone hole is
(A) Increased UV radiation (B) Green house effect
(C) Global warming (D) Acid rain
124. In the coming year skin related disorders might be more common due to …
(A)Use of detergents (B) Water pollution
(C) Depletion of ozone layer (D) Air pollution
125. Which unit is used for measuring thickness of ozone layer?
(A)P (B) DU (C) μ (D)RA.
126. Match the items given in column I and II
(A) (p-ii), (q-iii), (r-iv), (s-i)
(B) ( p-i), (q-ii) ,(r-iii), (s-iv)
(C) (p-ii), (q-iii), (r-I), (s-iv)
(D)(p-iv), (q-i),(r-ii) ,(s-iii)
127. Match the items given in column I and II
134. For the given statement which option is correct?
Statement:
(X) Air pollution causes injury to all living organisms.
(Y) The harmful effect depends on the concentration of pollutants, duration .
(A)Both X and Y are correct.Y gives correct explanation for X
(B)Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong
(D) X is wrong and Y is correct
135 . For the given statement which option is correct?
Statement:
(X) Polyblend is a fine powder of recycled modified plastic.
(Y) In Bangalore roads are made of mixture of Polyblend and bitumen which increases Strength of the road.
(A) Both X and Y are correct.Y gives correct explanation for X
(B) Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong
(D) X is wrong and Y is correct
136. For the given statement which option is correct?
Statement:
(X) Due to green revolution production of crop is more.
(Y) Water logging and soil salinity is the outcome of green revolution.
(A)Both X and Y are correct.Y gives correct explanation for X
(B)Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong
(D) X is wrong and Y is correct
137. For the given statement which option is correct?
Statement:
(X)Unleaded petrol should be used in automobiles with catalytic converter to reduce pollution.
(Y)Lead in the petrol inactivates Rhodium and palladium .
(A)Both X and Y are correct.Y gives correct explanation for X
(B)Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong
(D) X is wrong and Y is correct
138. For the given statement which option is correct?
Statement:
(X)DDT and plastic both are nonbiodegradable Waste
(Y) As the time passes, Pollutants of domestic sewage does not remain pollutants.
( A)Both X and Y are correct.Y gives correct explanation for X
(B)Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong (D) X is wrong and Y is correct
139. For the given statement which option is correct?
Statement
(X)Organic farming means agriculture with the help of chemicals.
(Y)500 members of Haryana Kissan welfare club have adopted this agricultural practice.
(A) Both X and Y are correct.Y gives correct explanation for X
(B) Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong
(D) X is wrong and Y is correct
140. For the given statement which option is correct?
Statement
(X)Deforestation is one of the important factor for global warming.
(Y)Green house gas CO2 increases due to deforestation. .
(A) Both X and Y are correct.Y gives correct explanation for X
(B) Both X and Y are correct.Y does not give correct explanation for X
(C) X is correct, Y is wrong
(D) X is wrong and Y is correct
141. How many molecules of ozone canbe decomposed by one atom of chlorine?
(A)100 (B)2.00.000 (C)1.00.000 (D)1000
142. Which gas is responsible for increase in atmosphere temperature?
(A)O 2 (B) CO2 (C)SO2 (D)CO
143. Slash and burn agriculture means..
(A) Agriculture on desert land (B) Jhum cultivation
(C) Cultivation on hills (D) Reforestation.
144. Which of the following is responsible for protection of living organism on earth?
(A) Ozone layer (B)Green house strategy
(C) Troposphere (D)Uvrays
145. With respect to value of BOD, arrange the following in descending order.
i) Distilled water ii) Tap water
iii) Industrial effluent iv) Sewage discharge in the river
(A) i– ii – iii - iv (B )iii –iv – ii - i
(C)iv –iii – ii - i (D) ii – I – iv – iii
146. Domestic sewage with _____% impurities is unfit for human use.
(A)0.2% (B)0.01% (C) 0.1% (D)0.02%
147. Green house Effect is the cumulative result of the influence of certain gases.
Identify the gas which is not involved in the influence
(A) CO (B) CFC (C) N2 (D)CH4
148. If fertilizers are added to fresh water ..
(A) Plants will die (B ) Eutropication will occur
(C) Fish population will decrease (D) Overall animal population will decrease
149. With the help of electrostatic precipitator which Air pollutant produced by cement factory is separated?
(A)NO2 (B)CO (C)SO2 (D)SPM
150. Which of the following does not occur when the sewage is discharged into the river?
(A) Eutropication (B)Depletion of O2
(C) Increase in O2 (D)Algal bloom
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