Environmental Chemistry Questions

We provide environmental chemistry practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on environmental chemistry skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.

List of environmental chemistry Questions

Question No Questions Class
1 210. Presence of which fuel gas in exhaust fumes shows
incomplete combustion of fuel?
(a) Sulphur dioxide
(b) Carbon monoxide and water vapours )
(c) Carbon monoxide isbatando
(d) Nitrogen dioxide
11
2 88. When polluted air is scrubbed with H,SO, solution,
(a) CH, is oxidized to CO,
(b) H,S is oxidized to sulphur
(c) oxides of nitrogen and sulphur are oxidised
(d) NO is reduced to N,
11
3 Measurement of rate of oxygen
utilisation by the unit volume of polluted water over a period of time is referred to as:
A. fermentation
B. chemical oxygen demand
c. oxidation potential
D. biological oxygen demand
11
4 Which gas is known to shield the earth
from harmful ultraviolet radiation?
A ( . ) CO
в. ( C O_{2} )
c. ( C F C s )
D. ( S O_{2} )
E. ( O_{3} )
11
5 The release of chlorofluorocarbons by
the use of refrigerators, air conditioners, deodorants, etc., are
destroying the ( _{text {一一一一一一一一 }} ) layer of the atmosphere.
A. Mesosphere
B. Ionosphere
c. Humidity
D. Ozone
11
6 A raw material feedstock should be
renewable rather than depleting, whenever technically and ecomonically practical, is an objective of:
A. Green revolution
B. Green chemistry
c. waste management
D. revolution resource recovery
11
7 The concentration of dissolved oxygen
(DO) in cold water can go upto:
A. 10 ppm
B. 14 ppm
( c .16 mathrm{ppm} )
D. 8 ppm
11
8 Which of the following characteristic property of clay soil make it useful to
grow plants?
A. Retain water and moisture
B. Do not retain water and moisture
c. Holds lot of sand
D. None of the above
11
9 45. Of the following which one pol-
lutes the air of a big city ?
(1) Copper (2) Chromium
(3) Lead (4) Calcium
11
10 0.18 Acid rain is known to contain some acids. Name these acids and where
from they come in rain?
UNO od
11
11 Q. 12 Which of the following practices will not come under green chemistry?
(a) If possible, making use of soap made of vegetable oils instead of using synthetic
detergents
(b) Using H,O, for bleaching purpose instead of using chlorine based bleaching
agents
(c) Using bicycle for travelling small distances instead of using petrol/diesel based
vehicles
(d) Using plastic cans for neatly storing substances
11
12 Thermal pollution causes a decrease in dissolved oxygen Is the above statement true?
A. True
B. False
11
13 The value of dissolved oxygen in polluted water is:
A ( .>4 ) ppm
В. ( <4 ) ppm
( mathbf{c} .=4 mathrm{ppm} )
( mathrm{D} .=6 mathrm{ppm} )
11
14 Biochemical Oxygen Demand(BOD)
value can be a measure of water
pollution caused by the organic matter.
Which of the following statements is
correct?
A. Polluted water has BOD value higher than 10 ppm
B. Aerobic bacteria decrease the BOD value
C. Anaerobic bacteria increase the BOD value
D. Clean water has BOD value higher than 10 ppm
11
15 The gas that is responsible for global warming is 11
16 Which of the following eliminates the species from a particular area?
I. Use of insecticides
II. Hunting of the species as prey
III. Habitat destruction
A. True
B. False
11
17 Photochemical smog affects plants by
A. Bleaching of leaves and excess production of pigments
B. Shedding of foliage and increase of transpiration
C. Decolourising and curling of leaves
D. Degradation of chlorophyll by ozone
11
18 Assertion
Ney York City may submerge due to global warming.
Reason
Due to global warming, glaciers are melting and due to this sea-level will be
certainly increasing which may cause flooding of cities situated at the bank of
the sea. New York is one of them.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
19 State True or False.
Forest Fires and droughts are man made causes of deforestation
A. True
B. False
11
20 photochemical
158. Which of the following statements about photocher
smog is incorrect?
(a) It has high concentration of oxidizing agents
(b) Plantation of some plants like pinus helps
controlling photochemical smog
(c) It can be controlled by controlling the release
NO,, hydrocarbons, ozone, etc.
(d) It has low concentration of oxidizing agents
11
21 Consider the following statements:
1. Global Warming is a phenomenon in which lower atmosphere traps more terrestrial radiation and thus the mean
global temperature of the earth rises beyond ( 14^{circ} mathrm{C} )
2. Global Warming takes place because of rise in the concentration of gases
known as greenhouse gases namely-
water, vapour, ( C O_{2}, C H_{4}, ) oxides of
Nitrogen and man-made gases like
( boldsymbol{C F C s} )
3. Among the greenhouse gases, ( C O_{2} ) is primarily responsible for Global Warming. Which of the statements given above is/are correct?
( A cdot 1,2 ) and 3
B. 2 and 3
c. only 2
D. only 3
11
22 Pollution is a change in physical, chemical or biological characters of our land and water that may be:
A. desirable and harmful to humans
B. desirable and useful to humans
c. undesirable and harmful to humans
D. undesirable and useful to humans
11
23 Taking chromium and arsenic, which
are toxic, out of pressure-treated wood, and using new less toxic chemicals for
bleaching paper, are examples of
A. Green chemistry
B. Green revolution
c. revolution resource recovery
D. waste management
11
24 Which of the following are the Green house gases?
A. ( C O_{2}, C H_{4}, N_{2} O ) and ( O_{3} )
B. ( C O_{2} ), Octane, chlorine, Nitrogen
c. Methane, Oxygen, Helium, Neon
D. None of these
11
25 The amount of oxygen used by microorganisms present in water for
five days at ( 20^{circ} mathrm{C} ) is called :
A. ( operatorname{cod} )
B. DO
c. TLV
D. BOD
11
26 BOD stands for:
A. Biochemical Oxygen Demand
B. Biological Oxygen Demand
C. Bacterial Oxidation Demand
D. Biochemical Oxidation Demand
11
27 Which of the following statements is
false?
A. The main reason for river water pollution is industrial and domestic sewage discahrge
B. Surface water contains a lot of organic matter mineral nutrients and radioactive materials
c. oil spills in sea water causes heavy damage to fishery
D. oil slick in a sea water increases DO value
11
28 Q2. What is the name of the compound formed when CO combines with blood? 11
29 Q. 38 Match the pollutants given in Column I with their effects given in
Column II.
Column!
Column II
A Phosphate fertilisers in water 1. BOD level of water increases
B. Methane in air
2. Acid rain
c Synthetic detergents in water 3. Global warming
D. Nitrogen oxides in air
4. Eutrophication
11
30 78. Identify the incorrect statement from the following:
(a) Oxides of nitrogen in the atmosphere can cause the
of depletion of ozone layer
(b) Ozone absorbs infrared radiation
(c) Depletion of ozone layer is because of its chemical
reactions with chlorofluoroalkanes
(d) Ozone absorbs the intense ultraviolet radiation of
the sun
11
31 Which one of these is not damaged due to excess lead in drinking water?
A. Kidney
B. Liver
C. Reproductive system
D. Teeth
11
32 Assertion(A): Atmosphere plays an important role in maintaining the heat balance on earth.

Reason(R): Atmosphere absorbs a portion of electromagnetic
radiation coming from the sun
and transmits near UV, visible
and near IR radiation.
A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not correct explanation of Assertion
c. Assertion is true and Reason is false
D. Assertion is false and Reason is true

11
33 Which of the following is a set of green
house gases?
A. ( O_{3}, N O_{2}, S O_{2}, C l_{2} )
в. ( C O_{2}, C H_{4}, N_{2} O, O_{3} )
( mathrm{c} cdot O_{3}, N_{2}, C O_{2}, mathrm{NO}_{2} )
D. ( C H_{4}, O_{3}, N_{2}, S O_{2} )
11
34 Identify the primary cause of global warming.
A. Emission of ( C O_{2} )
B. Emission of ( O_{2} )
c. Both a and ( b )
D. None of these
11
35 Global warming leads to:
A. increase in actual temperature of earth
B. decrease in actual temperature of earth
C. no change in temperature
D. change in pressure
11
36 Q3. Give three examples in which green chemistry has been applied.
1. … co in nlace of tetrachlos
11
37 Modes of controlling pollution in large
cities include :
A. less use of insecticides
B. proper disposal of organic wastes, sewage and industrial effluents
c. shifting of factories out of the residential area
D. all of the above
11
38 When the soil of the greenhouse nurseries is sterilized with methyl
bromide gas, it leads to a deficiency of:
A. cellulose in roots
B. chlorophyll in green leaves
c. zinc in plants
D. iron in red flowers
11
39 Which of them are Non-biodegradable
waste?
A. Synthetic fibers
B. Pen refills
c. silver foil
D. All of above
11
40 Chlorine atoms in the upper
atmosphere cause the breakdown of
ozone.
( boldsymbol{C l}+boldsymbol{O}_{3} rightarrow boldsymbol{O}_{2}+boldsymbol{C l O} )
( boldsymbol{C l O}+boldsymbol{O} rightarrow boldsymbol{C l}+boldsymbol{O}_{2} )
Which statements about these chlorine
atoms are correct?
1. The chlorine atoms act as catalysts.
2. The chlorine atoms are free radicals.
3. The chlorine atoms are formed by heterolytic fission of a covalent bond in
chlorofluorocarbons.
A .1,2 and 3 are correct
B. 1 and 2 only are correct
c. 2 and 3 only are correct
D. 1 only is correct
11
41 COD is a measure of:
A. organic substance in water
B. oxides of sulphur, phophorus,nitrogen in water
C. inorganic pollutants in water
D. salinity of water
11
42 Use of pesticides which do not contaminate soil help in control of
A. air pollution
B. soil pollution
c. industrial pollution
D. none of above
11
43 Which of the following gases can result
in the formation of acid rain?
A. Ozone
B. Carbon monoxide
c. Sulphur dioxide
D. chlorofluorocarbon
11
44 Sludge is:
A. created from combination of gases released from industries and water
B. a semi-solid slurry and can be produced as sewage sludge from wastewater treatment processes
C. a type of household waste
D. a type of industrial waste
11
45 If BOD value is greater than 17 ppm, then water belongs which of the following to category?
A. Normal water
B. Highly polluted water
c. Usable water
D. Slightly polluted water
11
46 Green house effect is mainly due to increase in the levels of
( A cdot O_{2} )
в. ( C O )
( c cdot C O_{2} )
D. ( N_{2} )
11
47 What is the link between domestic
waste and acid rain?
11
48 What is green chemistry? Write one importance of green chemistry. 11
49 Write short notes on, (a) Biological concentration and magnification,
(b)DDT,
(C) Bordeaux mixture, (d)
IPM,
(e) Natural insecticides,
(f) Biopesticides,
(g) Bioinsecticides
11
50 Addition of phosphate and nitrate/fertilizers into water leads to:
A. increased growth of decomposers
B. reduced of algae growth
c. increased growth of algae
D. nutrient enrichment
11
51 Q. 21 On the basis of chemical reactions involved, explain how
chlorofluorocarbons cause thinning of ozone layer in stratosphere?
do
11
52 What is acid rain? Mention two of its
effects.
11
53 is the collective name for layers of
soil.
A. A-horizon
B. B-horizon
c. c-horizon
D. Soil profile
11
54 Q. 29 Oxidation of sulphur dioxide into sulphur trioxide in the absence of a
catalyst is a slow process but this oxidation occurs easily in the
atmosphere. Explain how does this happen? Give chemical reactions for
the conversion of So, into S03.
trimido can necur both photochemically a
11
55 Which of the following properties of soil decreases due to deforestation?
A. Nutrient content
B. Fertility
c. Texture
D. All of the above
11
56 The presence of which of the following in drinking water is responsible for
mottling of teeth?
A. Mercury
B. lodine
c. Chlorine
D. Fluorine
11
57 Which soil is used to make decorative
articles and pots used for growing plants?
A. Multani soil
B. Terracotta soil
c. shadu soil
D. Kaolin (china clay)
11
58 Distilled water is clean and pure water, but unfit for human consumption.
A. True
B. False
11
59 The first organic pesticide to be used commercially was
A. Bordeaux mixture
B. Burgandy mixture
c. DDT
D. 2, ( 4- ) D
11
60 Acid rain is caused due to increase
in concentration of (in atmosphere)
A. ( S O_{2} ) and ( N O_{2} )
B. ( operatorname{coand} C O_{2} )
c. ( operatorname{coand} S O_{3} )
( mathrm{D} cdot O_{3} ) and dust
11
61 Which of the following provides shelter for many living organisms?
A. A-Horizon
B. B-Horizon
c. C-Horizon
D. None of the above
11
62 Q18. A large number of fish are sud
a large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic
dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
llutants such as leaves, grass trash etc.) present in
11
11
63 What constitutes smog? 11
64 What compounds are identified as contributing to acid rain?
A. Carbon dioxide
B. Sulphur and nitrogen oxides
c. Mercury oxides
D. Phosphates
11
65 ( 10 mathrm{mL} ) of water required ( 1.47 mathrm{mg} ) of ( K_{2} C r_{2} O_{7}left(M . w t_{.}=294right) ) for oxidation of
dissolved organic matter in presence of acid. Then the ( C .0 . D ) of water sample is:
A. 2.44 ppm
B. 24 ppm
c. 32 ppm
D. 1.6 ppm
11
66 Q15. Give one example of organic herbicide.
An
Triazine
11
67 96. NO and H.S both the pollutants of air. NO is
remover while H, S is NO remover. Under these effect
(a) NO is oxidized to NO, and H, S is oxidized to H.So
(b) NO is oxidized to NO, and H.S is reduced to H.S.O
(C) NO is reduced to NH, and H. S is oxidized to sulphur
(d) NO is reduced to N, and H.S is oxidized to sulphur
11
68 Current commercial method for
producing ibuprofen is a stunning
application of Green chemistry because
A. ibuprofen is an anti-inflammatory drug and has various applications
B. the previous method required large amounts of solvents and generated large wastes compared to the current method
C. it has very important medicinal value
D. this compound has very less side effects after usage
11
69 Maximum prescribed limit of ( C u ) in
drinking water is:
( A cdot 2 p p m )
B. 1 ppm
c. 3 ppm
D. 5ppm
11
70 Which of the following is the main factor of water pollution?
A. Smoke
B. Industrial waste
c. Detergent
D. Ammonia
11
71 Q. 26 What is the importance of measuring BOD of a water body? 11
72 Eutrophication means
A. excessive richness of nutrients in a water body or lake due to run off
B. decrease in growth of algae
C. increase in fertility of soil
D. all the above
11
73 The progressive warming up of the earth’s surface is mainly due to :
A. automobile exhaust
B. blanketing effect of carbon dioxide in atmosphere
c. reforestation
D. thickening of ozone layer
11
74 137. Nobel prize in green chemistry is not associated with
(a) Richard R Schrock (b) Yves Chauvin
(c) Robert H Grubbs (d) R Williamson
11
75 44. Smog is a combination of
(1) air and water vapour
(2) water and smoke
(3) fire and water
(4) smoke and fog
11
76 Which pollutant gas is produced by the decomposition of vegetation?
A. Carbon monoxide
B. Methane
c. Nitrogen dioxide
D. Sulfur dioxide
11
77 Erosion can be caused by which of the following?
A. Rain falling on steeply sloping land
B. A very hard rainfall
c. Rain falling on bare soil
D. All of the above
11
78 Maximum prescribed limit of Al in drinking water is:
( A cdot 5 ) ppm
B. 2 ppm
c. ( 0.2 mathrm{ppm} )
D. 0.5 ppm
11
79 Chemical pollution is mainly due to the discharge of organic ( & ) inorganic substances released into the water.
Is the above statement correct?
A . True
B. False
11
80 225. The statement which is not correct about control of
particulate pollution.
(a) In electrostatic precipitator, the particulates are
made to acquire positive charge which are then
attracted by the negative electrode and removed.
(b) Gravity setting chamber removes larger particles
from the air.
(c) Cyclone collector removes fine particles in the
diameter range 5–20 microns.
(d) Wet scrubbers are used to wash away all types of
particulates.
11
81 An area of soil is thoroughly wefted and allowed to drain until capillary movement of water stopped. The water contents of the soil will give an estimate of its
A. Capillary water
B. Storage water
c. Field capacity
D. Gravitational water
11
82 What is the effect of release of ( C O_{2} ) gas
on atmosphere?
A . Global warming
B. Photochemical smog
c. Ozone layer depletion
D. Tsunami
11
83 Which of the following are the substances that are present in the soil and required for the growth of crops?
A. Manures
B. Pesticides
c. Fertilisers
D. Nutrients
11
84 Which is not the green house gas among the following?
A. Chlorofluorocarbons
B. Argon
c. water vapour
D. Carbon-dioxide
11
85 The non-viable particulate among the following is:
A. dust
B. bacteria
c. moulds
D. fungi
11
86 116. If the organic content in water is high, the type of
chlorination to be adopted is
(a) double chlorination (b) breakdown chlorination
(c) superchlorination (d) post-chlorination
11
87 38. Water is often treated with chlorine to
(a) Kill germs
(b) Increases
(c) Remove hardness
(d) Remove suspended particles
11
88 What are the harmful effects of
photochemical smog and how can they be controlled?
11
89 Carbamates are used as a
A. Insecticide
B. Herbicides
C . Fungicides
D. All of the above
11
90 Which of the following is not a major option for managing hazardous waste?
A. Reducing the production of waste while increasing the amount generated
B. Reducing the volume and/or hazard of the wastee
c. Long-term storage or disposal
D. Dumping at sea
11
91 Soil is a natural medium for growth of land plants. Organic soil contains organic number upto a depth of
A. Two and a half feet
B. One foot
c. six inches
D. Ten feet
11
92 Identify an example of a successful way to dispose of hazardous waste.
A. Deep injection
B. Well burn it in an incinerator plant
c. Put it in a metal cask and throw it in the ocean
D. Bury in a metal drum in a regular landfill
11
93 Water holding capacity of the soil depends upon
A. Chemical composition of soil
B. Particle size of soil
c. Aggregation of soil particle
D. All of these
11
94 Q3. How are NO and NO, formed in the atmosphere? 11
95 Which of the following does not cause soil pollution?
A. Industrial wastes
B. Urban wastes
c. Agricultural practices
D. None of above
11
96 92. Oxides of sulphur and nitrogen can be removed by
scrubbing with
(a) Ca(OH), (b) H2SO4
(c) Both (a) and (b) (d) None of these
11
97 1
111. Very fine suspended and colloidal impurities are
removed by a process called
(a) softening
(b) coagulation
(c) disinfection (d) plain sedimentation
11
98 Identify the non-Green House Gas (GHG) from the following
A. Methane
B. Nitrous oxide
c. sulphur hexafluoride
D. Carbon monoxide
11
99 113. A common disinfectant used in village wells is
(a) potassium permanganate
(b) iodine and bromine
(c) ozone gas
(d) free chlorine
11
100 A river with high BOD value is
A. Highly polluted
B. Highly clean
c. Highly productive
D. Highly conducive for pisciculture
11
101 2.8 The gaseous envelope around the earth is known as atmosphere. The
lowest layer of this is extended upto 10 km from sea level, this layer is
(a) stratosphere (b) troposphere (c) mesosphere (d) hydrosphere
An
(5) Tronconha
har
14 vtende into the hainbat
11
102 Smog is formed when fog is mixed with
A. Sulphur
B. Mercury
c. smoke
D. Snow flakes
11
103 Excessive release of ( C O_{2} ) into the
atmosphere results in:
A. polar vortex
B. depletion of ozone
( c . ) formation of smog
D. global warming
11
104 Intermediate compound formed in the
depletion of ( boldsymbol{O}_{3} ) layer by
chlorofluorocarbons is:
( mathbf{A} cdot O_{2}, F_{2} )
в. ОС l
c. ( O F_{2} )
D. ( C l_{2} O )
11
105 Most hazardous metal pollutant of automobile exhaust is:
A. mercury
B. tin
c. cadmium
D. leadd
11
106 Photochemical smog always contains
A. aluminium ions
B. methane
c. ozone
D. phosphorus
11
107 31. Consider the following statement and select the correct
option:
S,: Dust is the non-viable particle.
S,Particulates acquire negative charge and are
attracted by the positive electrode.
Sz: 0, is a greenhouse gas.
S: Algae is a viable particulate.
(a) S, and S, only (b) S,, S, and S, only
(c) S, S, and S, only (d) S2, S, and SA
11
108 Which of the following countries suffer from the acid rains?
1. Canada
2. France
3. Norway
4. Germany Select the correct answers from the
codes given below:
A . 1 and 2
B. 1 and 3
( c cdot 2 ) and 3
D. 3 and 4
11
109 Q6. What is smog? How is classical smog different from photochemical smog?
ci
11
110 Global warming could result in wide ranging effects on:
A. rainfall patterns
B. agriculture, forests
c. plants and animals
D. All of the above
11
111 Which of the following is a microbial pesticide?
A. Rotenone
B. Thurioside
c. Baygon
D. Temik
11
112 43. Carbon footprint can be reduced
by
(1) All of these
(2) Recycling waste materials
(3) Using energy efficient appli-
ances
(4) Commuting by public trans-
port
11
113 Identify the correct statement.
A. Non-conventional sources of energy cause more pollution.
B. Ozone is a harmless gas present in atmosphere.
C. Chlorofluorocarbons break down to chlorine atoms by ultraviolet radiation
D. Trees do not help in decreasing sound pollution.
11
114 Atmosphere of big cities is polluted most by :
A. Automobile exhausts
B. Radioactive fall out
c. Household waste
D. Pesticide residue
11
115 Treatment of waste water involves
physical, chemical, and biological processes, which remove
matter that contaminates
waste water.
A. physical
B. chemical and biological
c. both ( A ) and ( B )
D. none of the above
11
116 Waste management is
A. to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc
B. the collection, transportation, disposal or recycling and monitoring of waste
C. the process of creating a clean and green environment
D. None of above
11
117 Classical smog is also called:
A. oxidising smog
B. reducing smog
c. photochemical smog
D. summer smog
11
118 The concentration of pesticide required to destroy ( 50 % ) of pest is called as
A . LD 50
B. LC 50
c. LB 50
D. LE 50
11
119 The process of ‘eutrophication’ is due to
A. increase in concentration of insecticide in water
B. increase in concentration of fluoride iron in water
C. the reduction in concentration of the dissolved oxygen in water due to phosphate in water
D. attack of younger leaves by peroxyacetyl nitrate
11
120 192. Which of the following statements (1)-(IV) are true
about photochemical smog?
(1) It occurs in warm, dry and sunny climate.
(II) It is formed from the action of sunlight on
unsaturated hydrocarbons and oxides of nitrogen
(II) It is called oxidizing smog.
(IV) It is called reducing smog.
(a) I, II and IV (b) II, III and IV
(c) I, III and IV (d) I, II and III
11
121 Assertion
Catalytic converters must be used in
cars.
Reason
Catalytic converter helps to reduce the
formation of acid rain.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
122 Q. 7 Which of the following statements about photochemical smog is wrong?
(a) It has high concentration of oxidising agents
(b) It has low concentration of oxidising agent
(c) It can be controlled by controlling the release of NO,, hydrocarbons, ozone etc
(d) Plantation of some plants like pinus helps in controlling photochemical smog
in to50
11
123 Chlorine is the main factor to damage ozone layer. CFC is considered
responsible for ( 80 % ) of total decrease in
ozone layer. If the pollution in the atmosphere increases, which of the following is possible in future?
P. The ice at poles will melt and all the organisms will die living at the island.
Q. Many organisms living at island may migrate.
R. The existence of forests on the Earth
will be no more.
A . Only Q
B. Only P and Q
c. All P, Q and R
D. only Q and R
11
124 144. Which of the following legislation gave birth to today’s
Green Chemistry initiatives?
(a) Pollution prevention Act of 1990
(b) Montreal Protocol of 1989
(C) Clean Water Act of 1972
(d) Superfund Act of 1980
11
125 Underground soil in cities is likely to be polluted by:
A. floods
B. decomposed and partially decomposed materials of sanitary wastes
c. fertilisers
D. landslides
11
126 49. The substance having the largest concentration in acid
rain?
(a) H2CO3
(c) HCl
(b) HNO,
(d) H.SO,
11
127 Which soil is used in cosmetics?
A. Multani soil
B. Terracotta soil
c. Shadu soil
D. Kaolin
11
128 87. Lead is
(a) air pollutant (b) noise pollutant
(c) radioactive pollutant(d) water and soil pollutant
11
129 Chronic bronchitis and emphysema are
more vulnerable to:
A. acid rains
B. water pollutants
c. smog
D. nitrogen oxides
11
130 In which of the following pairs, both of them are common greenhouse gases?
A. Oxygen, water vapour
B. Methane, carbondioxide
c. ozone, sulphurdioxide
D. Nitric oxide, chlorofluoro carbons
11
131 What are the major causes of water pollution? Explain. 11
132 In antarctica, ozone depletion is due to the formation of which of the following compounds?
A. Acrolein
B. PAN
c. PCBs
D. Chlorine nitrate
11
133 Acid rain occurs due to atmospheric pollution of:
( A cdot S O_{2} )
в. ( N H_{3} )
( c cdot C O_{2} )
D. ( N_{2} O )
11
134 Q12. What is the composition of London Smog? 11
135 Ruchi noticed a major problem in her state. She found that more and more
land area in her state is turning into desert. What is the condition called?
A. Deforestation
B. Barren land
c. Desertification
D. Afforestation
11
136 Q.1 Which of the following gases is not a green house gas?
(a) CO
(b) 03
(c) CH
(d) H,O vapour
11
137 Which of the following decides the standards for drinking water in Europe?
A. European Environment Protection Agency
B. European Drinking Water Directive
c. European Union Standards
D. European Safe Water Act
11
138 Height of Stratosphere above earth’s surface in ( (mathrm{Km}) ) is:
A . ( 0-10 )
B. 10-50
c. ( 50-85 )
D. 85-100
11
139 Which of the following statements is
not true?
( mathbf{A} cdot C O_{2} ) is the best fire extinguisher
B. Global warming can cause acid rain
C. Burning of coal and diesel releases sulphur dioxide gas
D. LPG has higher calorific value than biogas
11
140 Air contains ( 79 % N_{2} ) and ( 21 % O_{2} ) by
volume. If the barometric pressure is ( 750 m m H g ) the partial pressure of
oxygen is:
( left(d N_{2}=1.25, d O_{2}=1.42 g / mright) )
A. ( 157.5 mathrm{mm} ) of ( mathrm{Hg} )
в. ( 175.5 mathrm{mm} ) of ( mathrm{Hg} )
c. ( 315.0 mathrm{mm} ) of ( mathrm{Hg} )
D. None
11
141 The possible hazards of air pollution are
due to :
A) acid rains
B) photo chemical reactions taking place at stratosphere
C) an increase in the ( C O_{2} ) level in
the atmosphere
( A cdot A & B )
B. B & ( c )
( c cdot c & A )
D. ( A, B & C )
11
142 Which of the following pollutants is
released from the emission tubes of
diesel engines?
A. Mercury
B. Aluminium
c. Benzopyrene
D. ( C F C l_{2} )
11
143 We harm Earth with various activities
such as unorganised disposal of waste. Which of the following kinds of wastes lasts longest in the environment?
A. Kitchen waste
B. Chemical waste from factories
c. Agricultural waste
D. Nuclear waste
11
144 What is soil erosion? 11
145 06. Consider the following reactions provided by scientists
working in Antarctica about ozone hole.
(1) CIOº + NO2 →CIONO,
(II) CI+CHA- CH3 + HCI
(III) CIONO, +1,0—— HOCI + HNO,
(IV) CIONO, + HCl + Cl2 + HNO2
In summer season, there is less depletion of ozone layer
due to reactions.
(a) Both I and III (b) Both III and IV
(c) Both I and II (d) Both II and IV
11
146 166. Which of the following is an important part of
photochemical smog?
(a) SO2
(b) CO
(c) CO2
(d) NO,
11
147 Green fuel is the fuel obtained from:
A. Bio-waste
B. Metal waste
c. Plastic waste
D. Chemical waste
E. Electronic waste
11
148 What is the range of pH of acid rain?
A. More than 5.6
B. Less than 5.6
c. In between 5.6 to 6.6
D. In between 6.0 to 6.6
11
149 Which of the following statements is/are correct for generating nonbiodegradable waste?
A. Thermal power plants producing fly ash
B. Iron and steel plants producing blast furnace slag
c. Metal industries producing mud and tailings
D. All of the above
11
150 Which of the following cause water pollution?
A. Smoke/fly ash
B. Automobile exhausts
c. silt and pesticides
D. Aeroplanes
11
151 Q17. What is PAN stands for? 11
152 The agricultural field that produces maximum methane gas
into atmosphere is:
A. wheat field
B. paddy field
c. cotton field
D. groundnut field
11
153 11. Which of the following statement is false?
(a) Photochemical smog causes irritation in eyes
(b) London smog is oxidizing in nature
(c) London smog is a mixture of smoke and fog
(d) Photochemical smog results in the formation of
PAN
11
154 20. Removal of So, and SO, can be done by CaCO, using
(a) non-regenerative process
(b) regenerative process
(c) Both (a) and (b)
(d) None of the above
11
155 Long answer type questions:
Define soil erosion, It’s cause and a few
remedial steps that can be taken to control soil erosion.
11
156 Which of the following pairs is not
correctly matched?
A. Allotropic form of sulphur which is more stable at room temperature – Rhombic
B. The hydride of group 16 which is liquid at room temperature – Water
C. The gas formed in the upper layers of atmosphere by action of U V radiations – Nitrogen
D. The catalyst used in the manufacture of ( H_{2} S O_{4} ) by contact process – Vanadium pentoxide
11
157 Global warming is due to the increase
of:
A. methane and nitrous oxide in atmosphere
B. methane and ( C O_{2} ) in atmosphere
c. methane and ( O_{3} ) in atomsphere
D. methane and co in atmosphere
11
158 Q1. What do you mean by primary and secondary pollutants of the air?
Ans Primon nollutuntum
CA
11
159 Which of the following are greenhouse gases?
A. Carbon dioxide
B. Water vapour
c. Both A and B
D. None of these
11
160 or using plants (such as willow) to extract heavy metals can prevent soil pollution.
A. Phytoremediation
B. Biofertilizer
c. Bioremediation
D. None of above
11
161 What are the effects of acid rain ? 11
162 2. Which of the following causes less pollution?
(a) NO, (h) so
(c) CO2
(d) C, H,
11
163 226. Cl, and So, are pollutants as well as bleaching agents.
Their bleaching action is due to
SO,
CI,
(a) Oxidation Oxidation
(b) Reduction Reduction
(c) Oxidation Oxidation
(d) Reduction Oxidation
11
164 Q2. What is the compound formed when CO combines with blood? 11
165 9. Which of the following causes lung cancer?
(a) Paper
(b) Asbestos
(c) Silica
(d) Textiles
11
166 The type of pollution caused by spraying DDT is:
A. air and soil
B. air and water
c. air
D. air, water and soil
11
167 Pollution is:
A. removal of top soil
B. release of toxic/undesirable materials in environment
C. conservation of energy
D. all of the above
11
168 soil holds plenty of air.
A. Sandy
B. Clayey
c. silt
D. Both B and C
11
169 What is sewage? Explain why it is
harmful to discharge untreated sewage into rivers or seas.
11
170 82. Phosphate pollution is caused by
(a) sewage and agricultural fertilizers
(b) agricultural fertilizers only
(c) phosphate rocks and sewage
(d) weathering of phosphate rocks only
11
171 Q20. What is meant by polar vortex? 11
172 162. Which is not the constituent of photochemical smog?
(a) RCHO
(b) RCOR
(c) CF C12
(d) PAN
y recobetochemical smog?
11
173 Which one of the following is not a green
house gas?
A. ( C O_{2} )
в. ( H_{2} ) о
c. ( N_{2} )
D. ( O_{3} )
11
174 53. Atmosphere of big/metropolitan cities are polluted most
by:
(a) automobile exhausts.
(b) pesticide residue.
(C) household waste.
(d) radioactive fall out.
11
175 Statement(A): For green house effect, presence of green plants is essential.
Statement ( (mathrm{R}): C O_{2} ) and water vapour
present in the atmosphere absorb the re-emitted IR radiation from the
earths surface and warm the air
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not correct explanation of A
c. ( A ) is true and ( R ) is false
D. A is false and R is true
11
176 Q19. How can domestic waste be used as manure?
A
11
177 Environmental degradation means
A. Overall lowering of environmental qualities.
B. The adverse change brought in by human activities.
C . Ecological imbalance
D. All the above
11
178 Which of the following is not properly matched?
A. Formaldehyde – Carcinogenic
B. Sulphur dioxide – Respiratory problems
c. Nitrogen oxide – Brown air
D. Photochemical smog – Green air
11
179 Q1. How carbon monoxide acts as a poison for human beings? 11
180 139. Green chemistry aims to
(a) design chemical products and processes that
maximize profits
(b) utilize non-renewal energy
(c) design chemical products and processes that work
most efficiently
(d) design safer chemical products and processes
that reduce or eliminate the use and generation of
hazardous substances
11
181 3. Besides CO2, the other greenhouse gas is
(a) Ar
(b) N2
(c) O₂
4 BOD i
11
182 Which of the following gasses contribute to greenhouse effect?
A. ( C O_{2} )
в. ( C H_{4} )
c. ( C F C ) s
D. All of the above
11
183 Assertion
The amount of BOD in the waters is a
measure of the amount of organic material in the water.
Reason
Clear water has BOD less than 5 ppm
whereas highly polluted water have BOD value of 17 ppm or more.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
184 7. The pollutant released in Bhopal gas tragedy was
(a) Ammonia (b) Mustard gas (c) Nitrous oxide
8. Ahich of the follow
(d) Methyl isocyanate
11.
Donc
11
185 Major chemical species present in stratosphere is:
A. ( N_{2}, O_{2} )
в. ( O_{3}, H_{2} O )
c. Both A and B
D. None of these
11
186 What is bad ozone and good ozone? 11
187 The spores of Bacillus thuringiensis
are used as bioinsecticide. Comment.
11
188 Acid rain is caused by or recent reports
of acid rain in some industrial cities are
due to the effect of atmospheric
pollution by
A. Excessive release of ( C O_{2} ) by burning of fuels like wood and charcoal, cutting of forests and increased animal population
B. Excessive release of ( N O_{2} ) and ( S O_{2} ) in the atmosphere by burning of fossil fuel
C. Excessive release of ( N H_{3} ) by industrial plants and coal
gas
D. Excessive release of ( mathrm{CO} ) in the atmosphere by incomplete combustion of coke, charcoal and other carbonaceous fuel in the of oxygen
11
189 Q1. What is meant by PCBs? 11
190 Green chemistry means such reactions
which:
A. produce colour during reactions
B. reduce the use and production of hazardous chemicals
C. are related to the depletion of ozone layer
D. study the reactions in plant
11
191 An effective air-pollution control equipment is an attachment that electrically attracts pollutant particles in hot, escaping gases. It is known as:
A. an electric condenser
B. a gas condenser
c. an air purifier
D. an electrostatic precipitator
11
192 What is the pollutant produced from
industries and chemical factories?
A. Sediments
B. Radioactive substances
c. Toxic heavy metals
D. organic wastes
11
193 Which of the following is not a cause of pollution?
A. Afforestation
B. Wars among nations
c. Industrialization
D. Growth of algae in water
11
194 Q. 37 Match the activity given in Column I with the type of pollution created
by it given in Column II.
Column
Column II
(Activity)
(Effect)
A. Releasing gases to the atmosphere after 1. Water pollution
burning waste material containing
sulphur
B. Using carbamates as pesticides
2. Photochemical smog, damage to
plant life, corrosion to building
material, induce breathing problems,
water pollution
C. Using synthetic detergents for washing 3. Damaging ozone layer
clothes
D. Releasing gases produced by automobiles 4. May cause nerve diseases in human
and factories in the atmosphere
E. Using chlorofluorocarbon compounds for 5. Classical smog, acid rain, water
cleaning computer parts
pollution, induce breathing problems,
damage to buildings, corrosion of
metals
11
195 is the contamination of water
by substances harmful to life.
A. Water pollution
B. Air pollution
c. Noise pollution
D. None of the above
11
196 Arid soil is formed in western
Rajasthan. Its main features are:
I. Arid soils range from red to yellow in colour.
II. They are generally sandy and saline.
III. Humus and moisture content is very low due to dry climate and faster evaporation.
IV. Thorny bushes are found in this region
B. Only II and III
c. only I, II and i v
D. Only II, III and IV
11
197 Q3. Give three examples in which green chemistry has been applied. 11
198 The primary pollutant that leads to photochemical smog is :
A. sulphur dioxide
B. acrolein
c. ozone
D. nitrogen oxides
11
199 Global warming is caused due to_ concentration of Co,
in air
(a) Decreased
(b) increased
(c) Both (a) & (b) (d) None of these
11
200 Prepare slogans on greenhouse effect to
announce in your school assembly.
11
201 B.0.D values of four samples of water ( A )
( mathrm{B} mathrm{C} ) and ( mathrm{D} ) are given below
A. 160 ppm
B. 35 ppm
C. 180 ppm
D. 25 ppm The decreasing order of extent of pollution in water is ?
( A cdot C>A>D>B )
B. ( D>B>A>C )
( c cdot c>A>B>D )
D. D >A > B > C
11
202 Distinguish between Water pollution and land pollution. 11
203 Pollutant which causes acid rain is
( A cdot S O_{2} )
в. ( C O_{2} )
( c cdot c o )
D. Hydrocarbons
11
204 Q.14 Phosphate containing fertilisers cause water pollution. Addition of such
compounds in water bodies causes ……….
(a) enhanced growth of algae
(b) decrease in amount of dissolved oxygen in water
(c) deposition of calcium phosphate
(d) increase in fish population
11
205 Q21. What should be the tolerable limit of F-ions in drinking water? 11
206 Biological importance of ozone layer is:
A. ozone layer stops ultraviolet rays
B. ozone layer reduces green house effect
C. ozone layer reflects radio waves
D. ozone layer controls ( O_{2} / H_{2} ) radio in atmosphere
11
207 Instead of monitoring carbon dioxide, another gas that scientists could study
to substantiate the fact that ( C O_{2} ) concentration is steadily increasing in
the atmosphere is ( O_{2} ). Justify the
statement.
11
208 09. What are the reactions involved for ozone layer depletion in the stratosphere? 11
209 Which of the following reactions is not correct for the formation of acid rain?
A. ( N_{2}+O_{2} rightarrow 2 N O )
в. ( 2 N O+O_{2} rightarrow 2 N O_{2} )
c. ( H_{2} O+2 N O_{2} rightarrow H N O_{2}+H N O_{3} )
D. ( N O+O_{2} rightarrow N O_{2} )
11
210 190. Which is not correct statement for classical smog?
(a) It occurs in cool humid climate
(b) It is called oxidizing smog
(c) It is called reducing smog
(d) It is a mixture of smoke, fog and sulphur dioxide
11
211 The design, development and implementation of chemical products and process to reduce or eliminate the
use and generation of substances hazardous to human health and
environment is called
A. Green Revolution
B. Green Chemistry
c. Environmental Chemistry
D. waste Management
11
212 3.
Which of the following gases cause acid rain ?
(a) Ammonia
(b) Hydrogen
(c) Oxides of Nitrogen (d) Sulphur dioxide
11
213 Which gas can cause acid rain in nearby places and air pollution in downwind areas from the volcanic site?
( A cdot S O_{2} )
в. ( H_{2} S )
( c cdot C O_{2} )
D. All of the above
11
214 Which of the following is/are the main agents of soil erosion?
A) Wind and water
B) Rocks
c) sand
( A cdot A )
B. A & B
( c cdot B & C )
D. A, B, C
11
215 What are pesticides and herbicides? Explain with examples. 11
216 199. In winter season, special type of clouds called polar
stratospheric clouds are formed over Antarctica. As a
result, less depletion of ozone layer takes place due to
reactions
(a) CIONO, +H, HOCI + HNO,
(b) CIONO2 + HCl + Cl2 + HNO3
(c) Both (a) and (b)
(d) None of the above
11
217 47. Environmental pollution can be
controlled by:
(1) Checking atomic blasts
(2) Manufacturing electric vehi-
cles
(3) Sewage treatment
(4) All of the above
11
218 The first inorganic pesticide to be used commercially was
A. Bordeaux mixture
B. Burgandy mixture
c. D.D.T.
D. 2-4 D
11
219 1. CO in the atmosphere is due to
(a) incomplete combustion of petroleum fuels
(b) oxidation of carbon (coke) in metallurgical
extraction of metals
(c) thermal power plants
(d) All of the above
11
220 To manufacture computer chips, many chemicals, large amounts of water, and energy are required which is harmful to environment. a process is discovered which significantly reduces the quantities of chemicals, energy, and water needed to produce chips. This is an application of:
A. Green chemistry
B. waste management
c. revolution resource recovery
D. Green revolution
11
221 Given below is the cascade of events
following deforestation. Select the option which arrange them in the
correct sequence.
( P: ) Erosion of top soil
Q: River channel become shallow.
R : Eroded soil gets deposited on the river bed as silt
S : Destruction of crops leads to starvation.
T : Shallow channels cannot hold excess
water during rain and hence cause
flood
U: Floods damage agricultural crops.
A. ( P rightarrow Q rightarrow R rightarrow S rightarrow T rightarrow U )
в. ( P rightarrow R rightarrow Q rightarrow T rightarrow U rightarrow S )
( c cdot Q rightarrow R rightarrow P rightarrow S rightarrow T rightarrow U )
D. ( P rightarrow T rightarrow U rightarrow Q rightarrow R rightarrow S )
11
222 114. When chlorine is added to water before it enters the
distribution system is known as
(a) post-chlorination (b) pre-chlorination
(c) plan-chlorination (d) break point-chlorination
11
223 Unseasonal rains and cyclones are the
results of:
A. global warming
B. acid rain
c. increase of water pollution
D. increase of ( C O )
11
224 Water samples with ( B O D ) values of
( 4 p p m ) and ( 18 p p m, ) respectively, are:
A. highly polluted and clean
B. highly polluted and highly polluted
c. clean and highly polluted
D. clean and clean
11
225 Match the Column I and Column II and
choose the correct code given below.
Column I
(A) Peroxyacetyl nitrile
(i) Waste incineration
(B) Indigo
(ii) Vat dye
(C) IR active
(iii) Global warming molecules
(D) Dioxins
(iv) Photochemical
( operatorname{smog} )
( A cdot A-(i v) ; B-(i i) ; C-(i i i) ; D-(i) )
B. A-(i); B-(ii); C-(iv); D-(iii)
C. ( A-(i i) ; B-(i) ; C-(i v) ; D-(i i i) )
D. A-(iv); B-(i); C-(iii); D-(ii)
11
226 How water gets polluted? How the
pollution can be minimised?
11
227 143. The ‘green’ chemical used in household cleaners to
remove stains and also a favourite dressing on salads is
(a) hydrochloric acid (b) citric acid
(c) vinegar
(d) water
11
228 If water is polluted, its BOD (biochemical oxygen demand) value is:
( A .<1 mathrm{ppm} )
B. <2 ppm
( c .<3 p p m )
( D ldots 6 ) ppm
11
229 Q2. Explain the tropospheric pollution in 100 words? 11
230 150. In a country, following suggestions/ processes are being
strictly followed:
(1) Liquefied co, instead of C1,C = CCl, for dry
cleaning
(II) H,O, instead of So, and Cl, for bleaching of papers
and clothes.
(III) Biodiesel instead of normal refinery diesel for
automobiles.
Which of the above are under green chemistry?
(a) I, II and III (b) Both I and II
(c) Both I and III (d) Both II and III
11
231 Green house effect of global warming
causes:
A. rise in temperature of earth
B. rise in pressure on earth
c. decrease in oxygen content earths atmosphere
D. decrease in ( C O_{2} ) content
11
232 is the deterioration
(destruction) of the earths land surfaces, often directly or indirectly as a result of mans activities and their
misuse of land resources.
A. Land pollution
B. Soil erosion
c. Deforestation
D. Enrichment of soil
11
233 Carbon monoxide emitted by
automobiles prevents transport of oxygen in body due to:
A. its combination with oxygen to form carbon dioxide
B. break down of haemoglobin
c. preventing haemoglobin to form oxyhaemoglobin
D. formation of free radicals in the blood
11
234 Eutrophication is a
A. Neutral sign for ecosystem
B. Dual-sided sign for ecosystem
C. Bad sign for ecosystem
D. Good sign for ecosystem
11
235 Which gas is responsible for the depletion of ozone layer?
A. Carbon dl oxide
B. Methane
c. cluroflorocarbon
D. Sulphur di oxide
11
236 .30 From where does ozone come in the photochemical smog?
pition of NO into NO and
Ane SE
11
237 can cause sea levels to rise
dramatically.
A. Global warming
B. Rock slide
c. water pollution
D. None of the above
11
238 Read the following statements carefully
1. Photochemical smog always contains
ozone
2. The toxic effect of carbon monoxide is
due to its greater affinity for haemoglobin as compared to oxygen.
3. Lead is the most hazardous metal
pollutant of automobile exhaust. Which of the above statements is not
true?
A.
B. 2
( c .3 )
D. None of these
11
239 What is ozone depletion? 11
240 Classical smog is also called
as
A. London smog
B. sulphurous acid smog
c. Both ( A ) and ( B )
D. Los angles smog
11
241 Bioamplification is due to:
A. increase in the concentration of pesticides in water
B. gradual accumulation of pesticides from lower animals to higher animals
C . gradual decrease in concentration of pesticides in ( mathrm{H}_{2} mathrm{O} )
D. increase in space of biosphere
11
242 Match the Lists I and II and pick the
correct matching from the codes given
below.
List I
(i) Peroxy acetyl nitrate
1. Carcinogens
(ii) Polycyclic aromatic ( quad ) 2. Global warming hydrocarbons
3. Photochemical
(iii) IR active molecules
4. Waste
(iv) Dioxins ( quad ) incineration
A. ( (i)-3, ) (ii) ( -1, ) (iii) ( -4, ) (iv) -2
B. (i) – 3, (ii) – 2, (iii) – 4, (iv) – 1
C. (i) – 3, (ii) – 1, (iii) – 2, (iv) – 4
D. (i) – 4, (ii) – 2, (iii) – 1, (iv) – 3
11
243 Most insecticides attack upon insects
on their
A. Digestive system
B. Reproductive system
c. Nervous system
D. Respiratory system
11
244 Faraday has developed a plating process to make high-performance chrome coatings from trivalent chromium instead of highly toxic hexavalent chromium. This is an
application of:
A. Green revolution
B. Green chemistry
c. waste management
D. revolution resource recovery
11
245 Define a) Dalapon b) Metolachlor 11
246 26. Which of the following statements is true?
(a) London smog is oxidising in nature.
(b) London smog contains H, SO, droplets.
(c) London smog is mixture of smoke, fog and SO,
(d) London smog causes bronchitis.
11
247 The rain mixed with sulphuric acid is called as
A. Acid rain
B. Alkaline rain
c. Neutral rain
D. None of these
11
248 Q. 16 The consequences of global warming may be ……..
(a) increase in average temperature of the earth
(b) melting of Himalayan Glaciers
(c) increased biochemical oxygen demand
(d) eutrophication
11
249 Which layer of the atmosphere contains
the ozone layer?
A. Stratosphere
B. Troposphere
c. Exosphere
D. Mesosphere
11
250 What is the concentration above which
sulphate causes laxative effect?
( A cdot 500 ) ppm
B. 500 ppb
c. 100 ppm
D. 100 ppb
11
251 22. SO, can be removed by using the following
SO, +2H,
S 2H,0+ 3S
SO2 + Na,SO3 + H20-→ 2NaHSO3
This is called
(a) synergistic process
wololo do
(b) non-regenerative process
(c) desulphonation process
(d) regenerative process
11
252 Why does Mathura refinery pose problems to the Taj Mahal? 11
253 Which one of the following methods is most appropriate to check soil erosion on steep slopes?
A. Shelter belts
B. Mulching
c. Terrace cultivation
D. Multi-river project
11
254 125. An example of chemical toxics is
(a) removing water from industrial reactions
(b) utilizing ammonia instead of vinegar
(c) eliminating the formation of chlorinated organics in
paper
(d) storing BPA (Bis-phenol A) in plastic bottles
11
255 Q11. What is siltation? 11
256 “Sporeine” is used to control
A. Bacterial pathogen
B. Fungal pathogen
c. Nematodes
D. Insects pest
11
257 Acid rain is produced by:
A. excessive release of CO in air
B. excessive release of ( S O_{2} ) and ( H_{2} S ) in air
C . excessive release of ( N O_{2} ) and ( S O_{2} ) in air
D. excessive release of ( N H_{3} ) and ( C O_{2} ) in air
11
258 ( C O_{2} ) goes to air, causes green house effect and gets dissolved in water. What
will be the effect on soil fertility and ( p H )
of the water?
A. Increase
B. Decrease
c. Remain same
D. None of these
11
259 Biological importance of ozone layer is:
A. it stops ultraviolet rays
B. ozone layer reduces green house effect
C. ozone layer reflects radio waves
D. ozone layer controls ( O_{2} / H_{2} ) ratio in atmosphere
11
260 In Greece and Italy, marble statues were damaged by:
( A cdot operatorname{smog} )
B. acid rains
c. eutrophication
D. leakage of ( C l_{2} )
11
261 troposphere region
214. Variation of temperature (1) in the troposphere
with height (km) is
(a
*
*
0
2
8
4 6
km-
10 )
betyg
T
(6)
0
2
8
10
4 6
km
X
0
2
4 6
km
8
10
to
trollol odsto
(d)
0
2
4 6 8
km-b
10
na
ila bon
11
262 Which of the following is not a refrigerant?
A. ( C H C l F_{2} )
в. ( N H_{3} )
c. Ether
D. ( C_{2} H_{4} )
11
263 The aromatic compounds present as particulates are :
A. Polycyclic aromatic hydrocarbons
B. Benzene
c. Toluene
D. Nitrobenzene
11
264 The fuel obtained by decomposing sludge is:
A. biogas
B. petrol
c. diesel
D. kerosene
11
265 134. An example of green chemistry is
(a) recycled carpet
(b) a product made on Earth’s Day
(c) bioplastics or biodiesel
(d) a sublimation reaction
11
266 Which of the following practices involve green chemistry?
(i) Substitute CFCs by environmental friendly HFCs and other compounds.
(ii) Replace halogenated solvent by liquid ( C O_{2} ) for drycleaning.
(iii) Use of ( boldsymbol{H}_{2} boldsymbol{O} ) for bleaching instead of
( C l_{2} )
(iv) Making disposable eating utensils and storage jars of plastics.
( A ). (i) and (ii)
B. (ii) and (iv)
c. (iii) and (iv)
D. (i), (ii) and (iii)
11
267 Addition of phosphates and
nitrates/fertilizers into water leads to
A. Increased algal growth
B. Nutrient enrichment/ eutrophication
c. Increased growth of decomposers
D. Reduced algal growth
11
268 The pair of gases responsible for acid rain are:
A. ( H_{2}, O_{3} )
в. ( C H_{4}, O_{3} )
c. ( N O_{2}, S O_{2} )
D. ( C O, C H_{4} )
11
269 35. Iron and manganese are removed
in water by the process of:
(1) Chlorination
(2) Filtration
(3) Lime-soda treatment
(4) Aeration
11
270 Which of the following compounds are toxic?
A. Benzene
B. Toluene
c. Carbon tetrachloride
D. All of the above
11
271 The secondary precursors of photochemical smog are:
A. ( S O_{2} ) and ( N O_{2} )
B. ( N O_{2} ) and hydrocarbons
( mathrm{c} cdot O_{3} ) and hydrocarbons
D. ( C O_{2} ) and ( O_{2} )
11
272 Which type of biological waste effect soil?
A. Urine
B. Feces
c. Both a and ( b )
D. None of these
11
273 Q4. Which gases are responsible for greenhouse effect? List some of them. 11
274 Compost is being used for all of the following except:
A. landfill cover
B. landscaping
c. low grade fertilizers
D. agricultural field
11
275 What does Green Chemistry in terms of environment mean?
A. Greenhouse effect
B. Reaction related to depletion of ozone layer
c. Photosynthetic reactions in plants
D. Reduction in the use and production of hazardous chemicals
11
276 Consider the following statements:
1. The Government of India had launched
an initiative to study the phenomenon of black carbon, commonly known as
soot.
2. Black carbon is a form of particulate air pollution, produced from incomplete combustion of biomass burning,
cooking with solid fuels and diesel
exhaust.
3. The National Black Carbon
Programme is the joint effort of the Ministry of Environment, Earth
Sciences, Science end Technology and
ISRO.

Which of the statements given above is/are correct?
( A cdot 1,2 ) and 3
B. 1 and 2
c. only 1
D. only 2

11
277 69. Air pollutants that produce photochemical oxidants
include:
(a) CO2, CO and So, (b) NO, NO and HNO,
(c) 0,, Cl, and HNO3 (d) 03, Cl, and SO,
11
278 232. Carcinogenic pollutants are
(a) PCBs
(b) benzene
(c) Both (a) and (b) (d) None of these
11
279 47. Cloud burst means
(1) Formation of artificial rain
(2) Abnormally heavy down-
pour of rain, associated
with thunderstorm
(3) Presence of scattered flakes
of cloud in the sky
(4) Sowing of seeds of a crop
in a cloudy weather
11
280 . 42 Assertion (A) Carbon dioxide is one of the important green house gases.
Reason (R) It is largely produced by respiratory function of animals and
plants.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and Rare not correct
(d) A is not correct but R is correct
11
281 How soil erosion is a cause of soil
pollution?
A. By decreasing area of productive land.
B. By increasing area of productive land.
C. By decreasing area of land.
D. By decreasing area of non-productive land.
11
282 Phosphate pollution is caused by:
A. weathering of phosphate rocks only
B. agriculatural fertilizers only
C . phosphate rocks and sewage
D. sewage and agricultural fertilizers
11
283 The COD values of three water samples
( A, B ) and ( C ) are 60 ppm, 990 ppm and 120 ppm respectively. The most polluted water sample is:
( A cdot A )
B. B
( c cdot c )
D. All are equally polluted
11
284 The herbicide DCMU kills the weeds
because it inhibits
A. respiration
B. ( C O_{2} ) fixation
c. cell division
D. ( N O_{3}^{2-} ) uptake
11
285 Chief source of soil and water pollution
is:
A. mining
B. agro industry
c. thermal power plant
D. all the three
11
286 How industrial effluents effects soil
pollution?
A. By decreasing its fertility
B. By decreasing its water absorbing capacity
c. By increasing its fertility
D. Both A and B
11
287 Which of the following reaction occur when urea is added to soil as a fertilizer?
A. ( N H_{2} C O N H_{2} longrightarrow H N C O+N H_{3} )
B. ( N H_{2} C O N H_{2}+H_{2} O longrightarrow 2 N H_{3}+C O_{2} )
c. ( 2 N H_{2} C O N H_{2} longrightarrow H_{2} N C O N H C O N H_{2}+N H_{3} )
D. Both 1 and 2
11
288 Flouride in drinking water causes
harmful effect on bones and teeth when
its concentration becomes:
A. greater than 10 ppm
B. less than 1 ppm
c. greater than 15 ppm
D. greater than 2 ppm
11
289 Which of the following pollutants cannot be degraded by natural process?
A . DDT
B. Nuclear Waste
c. Heavy Metalss
D. All of the above
11
290 The two gases making the highest relative contribution to the greenhouse
gases are:
A ( cdot C O_{2} ) and ( C H_{4} )
B. ( C H_{4} ) and ( N_{2} O )
c. ( C F C s ) and ( N_{2} O )
D. ( C O_{2} ) and ( N_{2} O )
11
291 The amount of oxygen required by bacteria to break down the organic
matter present in a certain volume of a
sample of water, is called
A. BOD
в. АВЕ
( c cdot cos )
D. standard amount of oxygen
11
292 Whenever practicable, synthetic methods should be designed to use and generate substances that are little or
not toxic to human health and
environment, is an objective of:
A. waste management
B. green chemistry
c. air pollution
D. green revolution
11
293 94. Which of the following is the coldest region of
atmosphere?
(a) Thermosphere (b) Troposphere
(C) Mesosphere (d) Stratosphere
11
294 ( p H ) of the rain is increased in heavy industrial area due to:
( A cdot ) acid rain
B. land pollution
c. water pollution
D. none of the above
11
295 Soap and detergents are the source of organic pollutants like
A. Glycerol
B. Polyphosphates
c. Sulphonated hydrocarbons
D. All of these
11
296 Q20. For your agricultural field or garden you have developed a compost producing pit. Discuss the
process in the light of bad odour, flies and recycling of wastes for a good produce.
11
297 147. Which of the following statements about polar
stratosphere clouds (PSCs) is not correct?
(a) PSCs do not react with chlorine nitrate and HC1
(b) Type I clouds are formed at about -77°C and contain
solid HNO3.3H,0
(c) Type II clouds are formed at about – 85°C and
contain some ice
(d) A tight whirlpool of wind called polar vortex is
formed which surrounds Antarctica
11
298 5. The biggest particulate matter is
(a) HNO2 droplets (b) Fly ashodno
(c) H,SO, droplets (d) Soot
11
299 Name of the chemical responsible for destructive of the ozone layer. Start the main chemical from these chemicals
which is responsible for more then ( 80 % ) onzen depletion. Start the man -made applications which make of the
chemical
11
300 If ( C C l_{3} F ) is present in the stratosphere, it will react with which of the following:
A) Ozone
( begin{array}{ll}text { B) } N_{2} & text { C) } C O_{2}end{array} )
( A cdot A )
B. B
c. ( A & B )
( D cdot c & A )
11
301 Smoke is a form of wet deposition of acid rain. True or false?
A. True
B. False
11
302 Soil contains
A. Air and water
B. Water and plants
C. Minerals, organic matter, air and water
D. Water, air and plants
11
303 What is Green Chemistry? 11
304 63. The medium present in the environment which
consumes some amount of certain pollutant is called a
(a) sink
(b) target
(c) receptor
(d) none of these
11
305 at species IR ISTIUSO
Q. 28 A factory was started near a village. Suddenly villagers started feeling
the presence of irritating vapours in the village and cases of headache,
chest pain, cough, dryness of throat and breathing problems increased.
Villagers blamed the emissions from the chimney of the factory for such
problems. Explain what could have happened. Give chemical reactions
for the support of your explanation.
11
306 191. Which of the following is the primary precursor of
photochemical smog?
(a) Hydrocarbon (b) Ozone
(c) PAN
(d) Water vapour
11
307 51. The uppermost region of the atmosphere is
07- (a) stratosphere (b) exosphere onda
(c) troposphere (d) ionosphere
11
308 Which of the following is a measurement of water pollution?
A . PSC
в. РСВ
( c . ) во
D. coo
11
309 The toxic chemicals from industries
released in water lead to:
A. change in the color of water
B. eutrophication
c. change in the temperature of water
D. all of above
11
310 Maximum prescribed limit of ( Z n ) in
drinking water is:
( A cdot 1 ) ppm
B. 10 ppm
c. 4 ppm
D. 5 ppm
11
311 Ultraviolet radiation is absorbed by?
A. exosphere
B. ionosphere
c. ozonosphere
D. stratosphere
11
312 93. Which of the following in not an example of green
chemistry?
(a) Reacting methylamine and phosgene to produce
methyl isocyanate
(b) Replacement of CFCs by Co, as blowing agent in
the manufacture of polystyrene foam sheets
(c) Catalytic dehydrogenation of the diethanol amine
without using cyanide and formaldehyde
(d) Replacement of organotins by ‘sea-nine’as
antifouling compound in sea marines.
11
313 140. Green chemists reduce risk by
(a) inventing technologies that will clean up toxic sites
(b) minimizing the use of all chemicals
(c) reducing the hazard inherent in a chemical product
or risk
(d) developing recycled products
11
314 Untreated domestic sewage has a low:
A. BOD value
B. % of dissolved ( 0_{2} )
c. amount of dissolved salts
D. value of suspended organic matter
11
315 Phytotron is
A. A controlled condition chamber for plants
B. Leaf culture process
C . Special culture of seeds
D. Root culture process
11
316 How is population density calculated? 11
317 Give any two reasons for land
degradation.
11
318 115. The amount of chlorine available in water after
disinfection is called
(a) free chlorine
(b) free available chlorine
(C) residual chlorine
(d) combined available chlorine
11
319 79. Which city is not the part of Taj Trapezium?
(a) Agra
(b) Faridabad
(c) Mathura
(d) Firozabad
11
320 141. Which of the following is a challenge for green
chemists?
(a) Knowing when to reduce and eliminate hazardous
waste
(b) Developing chemicals that are recyclable
(c) Training of cleaning up chemical spills
(d) Awareness of the benefits of green chemistry
11
321 Which of the following is a sink for CO?
A. Haemoglobin
B. Microorganism presence in the soil
c. Ocean
D. Plant
11
322 the second layer of the atmosphere reaches ( 48 mathrm{km} ) above the earth’s surface. 11
323 Q.5 Which of the following statement(s) is/are wrong?
(a) Ozone is not responsible for green house effect
(b) Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur
trioxide
(c) Ozone hole is thinnig of ozone layer present in stratosphere
(d) Ozone is produced in upper stratosphere by the action of UV rays on oxygen
maible for aronnhance fact Its contribution is about god
11
324 Name the two important non-metallic oxides which causes acid rain. 11
325 Solvents used to dry clean clothes are
usually ( C_{2} C l_{4} . ) A substitute has been discovered which is environmental
friendly is an application of
A. Green revolution
B. Green chemistry
c. waste management
D. Revolution resource recovery
11
326 The greenhouse effect is possible if the
percentage of ( boldsymbol{C O}_{2} ) is :
A . 0.01 %
B. 0.03 %
c. ( 0.15 % )
D. 0.02 %
11
327 Which soil is red in colour?
A. Multani soil
B. Shadu soil
c. Terracotta soil
D. Kaolin (china clay)
11
328 Water is often treated with chlorine to:
A. cause sedimentation
B. remove insoluble impurities
c. increase oxygen content
D. kill Germs
11
329 What is so important about the troposphere?
A. Layer of water at or near Earths surface
B. Contains ozone
c. It contains weather and the oxygen that we breath
D. All of the above
11
330 Which of the following disease increase due to greenhouse effect?
A. Malaria
B. Dengue
c. Yellow Fever
D. All of the above
11
331 Which of the following is not primary pollutant?
( A cdot S O_{2} )
в. ( H_{2} S )
c. ( C O )
( mathrm{D} cdot mathrm{SO}_{3} )
11
332 Acid rain is caused by
A. emission of gases from industries
B. air pollutants
C. both (A) and (B)
D. none of above
11
333 Q. 40 Assertion (A) The pH of acid rain is less than 5.6.
Reason (R) Carbon dioxide present in the atmosphere dissolves in rain
water and forms carbonic acid.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and R are not correct
(d) A is not correct but R is correct
e
t stotinaf
11
334 83. Acid rain is specified when pH is
(a) between 6 and 7 (b) between 7 to 9
(c) below 5.6
(d) above 9
11
335 Q15. What are pesticides and herbicides? Explain giving examples. 11
336 What are bio-hard and bio-soft
detergents? Give one-one illustration of
each.
11
337 Soil pollution is the outcome of
A. deforestation
B. pesticides and herbicides
c. industrial waste
D. all of above
11
338 The ‘blue baby’ syndrome is related to
A. Excess of TDS (total dissolved solid)
B. Excess of chloride
c. Methemoglobin
D. Excess of dissolved oxygen
11
339 As proved by many studies, the
greenhouse effect is rapidly increasing
because of increase in the
concentration of carbon dioxide. In the
given graph, the increase in carbon
dioxide concentration is shown.What
could be ( X ) corresponding to it?
(i) Rate of photosynthesis in plants
(ii) ( p H ) of the oceans
(iii) Water level of ocean
(iv) Average global temperature of earth
A. (i) and (iii)
B. (ii) and (iv)
C . (ii) only
D. (iv) only
11
340 Urea is preferred to ammonium sulphate soluble in water as a nitrogenous fertilizer because:
A. it is more soluble in water
B. it is cheaper than ammonium sulphate
C. it is quite stable
D. it does not cause acidity in the soil
11
341 Q1. Define environmental chemistry? 11
342 Lung diseases are four times more in
urban areas than in rural areas. This is
due to the presence of:
( A cdot S O_{2} )
в. ( C O_{2} )
c. ( N_{2} )
D. water vapour
11
343 The dissolution of ozone layer cause
ozone hole in the blanket surrounding the atmosphere. What the ill effects of ozone hole?
A. Greenhouse effect
B. Global warming
c. Acid rain
D. UV rays reaching the earth.
11
344 Polythene is which type of waste?
A. Domestic
B. Industrial
c. Chemical
D. None of these
11
345 State True or False.
Use of herbicides and pesticides should be reduced to prevent soil pollution.
A. True
B. False
11
346 Q. 36 Match the pollutant(s) in Column I with the effect(s) in Column II.
Column 1
Column II
A. Oxides of sulphur 1. Global warming
B. Nitrogen dioxide 2. Damage to kidney
C. Carbon dioxide
3. “Blue baby syndrome
D Nitrate in drinking water 4. Respiratory diseases
Lead
5. Red haze in traffic and congested areas
JON
11
347 A water sample has ppm level concentration of following anions ( boldsymbol{F}^{-}=mathbf{1 0} ; boldsymbol{S} boldsymbol{O}_{4}^{2-}=mathbf{1 0 0} ; boldsymbol{N} boldsymbol{O}_{3}^{-}=mathbf{5 0} )
The anion/anions that make/makes the
water sample unsuitable for drinking is/are:
A. both ( S O_{4}^{2-} ) and ( N O_{3} )
B . only ( F^{-} )
C . only ( S O_{4}^{2} )
D. only ( N O_{3}^{-} )
11
348 Which one of the following is not a green-house gas?
A. ( C O_{2} )
в. ( N_{2} ) О
( c cdot O_{3} )
D. ( N_{2} )
11
349 What do you do in the following
situations :
(a) Exposed to exhaust fumes in traffic.
(b) Exposed to a series of fire crackers with high sound level.
(c) Get turbid drinking water during
monsoon.
11
350 The amount of oxygen required to oxidise organic substances present in water is called:
A. Dissolved oxygen (DO)
B. Chemical oxygen demand (COD)
c. Biochemical oxygen demand (BOD)
D. The threshold limit value (TLV)
11
351 What do you mean by green chemistry?
How will it help decrease environmental pollution?
11
352 156. Which of the following statements is not true about
classical smog?
(a) It contains compounds of reducing nature
(b) It is produced in cold and humid climate
(c) Its main components are produced by the action of
sunlight on emissions of automobiles and factories
(d) It contains smoke, fog and SO,
11
353 The presence of which of the following gases in air checks the ultraviolet from sun light?
( A cdot S O_{2} )
в. ( C O_{2} )
c. ( N O )
D. ( O_{3} )
11
354 Assertion(A): Smaller particles (size <5 microns) cause fibrosis of the lung
lining. Reason
(R): They are more likely to
penetrate into the lungs.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not correct explanation of
c. ( A ) is true and ( R ) is false
D. A is false and R is true.
11
355 Which of these are particulates?
A. Dust and fumes
B. Fly ash and smoke
c. Mist and fumes
D. All of these
11
356 Carbon footprint is the amount of
carbon dioxide released into the
atmosphere because of human activities. By which of the following ways we can reduce the carbon footprint?
A. By keeping an electrical device on standby mode when not in use
B. Print on single side of paper instead of writing
c. Use of CFLs in daytime and bulbs in night to study
D. Use of public transport or carpool wherever and whenever we can
11
357 Q. 33 Some time ago formation of polar stratospheric clouds was reported over
Antarctica. Why were these formed? What happens when such clouds
break up by warmth of sunlight?
11
358 97. The region which is greatly affected by air pollution is
(a) Troposphere (b) Stratosphere
(c) Thermosphere (d) Mesosphere HD
11
359 Assertion : Pyrethrum is collected from th
e leaves of Chrysanthemum cinerarifolium.
Reason

Pyrethrin is prepared from pyrethrum.
A. If both the assertion and the reason are true and the
reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false
E. If the assertion is false but reason is true

11
360 What is the effect of soil erosion in our
country?
11
361 7. Formation of London smog takes place in
(a) Winter during day time
(b) Winter during morning time
(c) Summer during day time
(d) Summer during morning time
11
362 Photochemical smog does not contain
A. PAN
B. Ozone
c. Nitrogen dioxide
D. ( S O_{2} )
11
363 When pollutants in the air mix up in a chemical reaction, they form an even more dangerous chemical.these pollutants are called
A. primary air pollutant
B. secondary air pollutant
c. tertiary air pollutant
D. none of above
11
364 27. Ozone layer of stratosphere required protection from
indiscriminate use of
(a) Balloons
(b) Pesticides
(c) Aerosols and high flying jets
(d) Atomic explosions
11
365 List out the major air pollutants. 11
366 Q8. Name the acids which are responsible for acid rain? 11
367 6. The gas leaked from a storage tank of the Union Carbide
plant in Bhopal gas tragedy was:
(a) Ammonia
(b) Phosgene
(c) Methylisocyanate (d) Methylamine
11
368 0.25 What are the sources of dissolved oxygen in water? 11
369 Q5. (a) Define eutrophication and pneumoconiosis.
(b) Write difference between photochemical and classical smog.
bo
11
370 Which one causes photochemica
smog?
( A cdot O_{3}, ) PAN and ( N O_{2} )
B. ( O_{3} ), PAN and ( C O )
c. HCN, NO and PAN
D. ( O_{2} ), PAN and ( N O_{2} )
11
371 194. Select the correct statement(s).
(a) PAN is formed in a chain reaction
(b) PAN is a product of photochemical smog
(c) NO, contributes to haze
(d) All of the above are correct statements
11
372 Which of the following can be used for controlling Gaseous Pollutant?
A . Arrestor
B. Incineration
c. Absorption
D. None of above
11
373 Afforestation and reforestation is a
measure mainly to control
A. soil pollution
B. water pollution
c. thermal pollution
D. none of above
11
374 Plastics being developed from ecofriendly renewable sources, plus some modern plastics are biodegradable is
one of the achievements of
A. Green revolution
B. Waste management
c. Revolution resource recovery
D. Green chemistry
11
375 Mark the example which in not correctly
matched?
A. Air pollutants – Oxides of sulphur, nitrogen and carbon
B. Particulate pollutants – Dust, mist fumes
C. Global warming – Methane, ozone, CFCs
D. Water soluble chemical pollutants – Oxides of nitrogen, carbon and sodium
11
376 129. Which of the following is the greenest solvent?
(a) Formaldehyde (b) Benzene
(c) Water
(d) Ethanol
11
377 Which of following heavy metals does not belong to a category of chemical pollutants?
A. ( C d )
в. ( H g )
c. ( N i )
D. ( F e )
11
378 Q. 27 Why does water covered with excessive algae growth become polluted? 11
379 Which one of the following is responsible for the soil erosion in farms?
A. Rivers and wind work
B. Defective methods of farming
c. Flowing water
D. Moving glaciers
11
380 6. Ozone depletion is mainly due to
(a) HCFS (b) CFCs
(c) CHBr
(d) all of the above
7 The nelltant talased
Re
d
11
381 Largest group of insecticide of plant origin are
A. Organochlorines
B. Triazines
c. Pyrethroids
D. Carbamates
11
382 Which of the following is not a cause of acid rain?
A. Burning of fossil fuels
B. Bacterial decomposition of organic matter
c. Internal combustion engines
D. None of the above
11
383 179. Cyanides (CN) in industrial waste are quite poisonous
to aquatic life. With Ni2+, a stable complex is formed
which is not toxic as cyanide
Ni2+ + 4CN –> [Ni(CN)41-
Poisonous
Non-toxic
The term is explained by
(a) antagonism (b) synergism
(c) eutrophication (d) None of these
11
384 CIPIUL DUC
PA J
E
Q4. What do you mean by greenhouse effect? What is the role of Co, in the greenhouse effect?
the boot from the sun and
11
385 Q. 23 During an educational trip, a student of botany saw a beautiful lake in a
village. She collected many plants from that area. She noticed that
villagers were washing clothes around the lake and at some places waste
material from houses was destroying its beauty.
After few years, she visited the same lake again. She was surprised to
find that the lake was covered with algae, stinking smell was coming out
and its water had become unusable. Can you explain the reason for this
condition of the lake?
11
386 Q. 50 For dry cleaning, in the place of tetrachloroethane, liquified carbon
dioxide with suitable detergent is an alternative solvent. What type of
harm to the environment will be prevented by stopping use of
tetrachloroethane? Will use of liquified carbon dioxide with detergent be
completely safe from the point of view of pollution? Explain.
.
11
387 Global warming is due to greenhouse effect. The greenhouse gas include:
( A cdot C O_{2} )
B. Oxides of nitrogen
( c cdot ) Both a ( & b )
D. None of the above
11
388 Which layer protects us from harmful ultraviolet rays of the sun?
A. First layer
B. Second layer
c. Ozone layer
D. Exosphere
11
389 Look at the picture. What is this item
made of?
A. Leather
B. Glass
c. Rubber
D. Plastic
11
390 17. Which forms the part of hazy fumes of photochemical
smog?
(a) SO,
(b) Aldehydes
(C) PAN formation (d) Nitrogen dioxide
11
391 What is the population of these states?
(i) Sikkim
(ii) Lakshadweep
11
392 The upper stratosphere consisting of
the ozone layer protects us from the sun’s radiation that falls in the
wavelength region of:
A. ( 600-750 mathrm{nm} )
B. ( 0.8-1.5 mathrm{nm} )
( c .400-550 mathrm{nm} )
( m )
D. 200 – 315 nm
11
393 60. Oxides of nitrogen
(a) are toxic to living tissues
(b) cause respiratory diseases in children
(c) retard the rate of photosynthesis o
(d) causes all of these
ma
11
394 Waste water from industries should not
be used for irrigation without eliminating toxic chemicals from the
effluent. This is a measure to control
A. air pollution
B. water pollution
c. soil pollution
D. none of above
11
395 Q. 35 Match the terms given in Column I with the compounds given in Column II.
Column 1
Column II
A. Acid rain
1. CHCI-CHFZ
B. Photochemical smog
2. CO
C Combination with haemoglobin 3. CO2
D. Depletion of ozone layer
4. SO
5. Unsaturated hydrocarbons
OD
11
396 125. In India, rules of Green Chemistry are governed by
(a) IGT
(b) RGT
(c) NGT
(d) SGT
11
397 29. Which of the following fuels caus-
es minimum environmental pol-
lution ?
(1) Kerosene (2) Diesel
(3) Coal (4) Hydrogen
11
398 e. 13 Which of the following conditions shows the polluted environment?
(a) pH of rain water is 5.6
(b) Amount of carbon dioxide in the atmosphere is 0.03%
(c) Biochemical oxygen demand 10 ppm
(d) Eutrophication
11
399 Which of the following reactions is taking place resulting in discolouration of marble of the buildings like Taj Mahal?
A ( cdot C a C O_{3}+H_{2} S O_{4} rightarrow C a S O_{4}+H_{2} O+C O_{2} )
в. ( C a C O_{3}+H C l longrightarrow C a C l_{2}+H_{2} O+C O_{2} )
( mathrm{c} cdot mathrm{CaCO}_{3}+mathrm{H}_{2} mathrm{O} rightarrow mathrm{Ca}(O mathrm{H})_{2}+mathrm{CO}_{2} )
D. ( operatorname{CaCO}_{3} rightarrow ) СаО ( + ) СО ( _{2} )
11
400 Q. 20 Dissolved oxygen in water is very important for aquatic life. What
processes are responsible for the reduction of dissolved oxygen in water?
11
401 Q. 3 Which of the following statements is not true about classical smog?
(a) Its main components are produced by the action of sunlight on emissions of
automobiles and factories
(b) Produced in cold and humid climate
(c) It contains compounds of reducing nature
(d) It contains smoke, fog and sulphur dioxide
11
402 Which type of rain can cause soil pollution?
A. Acid rain
B. Tropical rain
c. Temperate rain
D. All of these
11
403 45. Of the following, which
pollutes the air of a big ci
(1) Copper
(2) Chromium
(3) Lead
(4) Cadmium
11
404 Region/regions of the atmosphere where temperature decreases with
altitude is/are:
A. thermosphere
B. stratosphere
c. troposphere
D. ozonosphere
11
405 Green house effect is caused by :
A ( . N O_{2} )
в. ( C O )
c. ( N O )
D. ( C O_{2} )
11
406 Acid rain is due to pollution of
A. Dust
B. Pesticides
c. ( S O_{2} ) and ( N O_{2} )
D. Carbon particle
11
407 220. The statement which is not true
(a) NO, does not play any role in photochemical smog
b) SO, is more harmful air pollutant than SO,
(c) So, does not affect larynx (voice box)
(d) NO is more toxic to living tissues than NO,
11
408 A little amount of fertilizer makes your
lawn grow better but a larger amount of the same kills grasses.Why?
11
409 Agriculture can cause soil
contamination due to:
A. accumulation of animal manures
B. illicit dumping of tainted crops on land
C. improper sanitation system
D. both ( A ) and ( B )
11
410 A Crane had DDT level of 5 ppm in its
body. What would happen to the population of such birds?
11
411 Which of the following is determined by the oxidation of acidified potassium dichromate?
A. DO
B. BOD
( c cdot cos )
D. TLV
11
412 Depletion of ozone layer causes:
A. blood cancer
B. Iung cancer
c. skin cancer
D. breast cancer
11
413 Spraying of DDT produces pollution of
A. Air
B. Air and water
c. Air and soil
D. Air, water and soil
11
414 During a thunderstorm, rainwater contains nitric acid. Explain with
reaction.
11
415 154. Which of the following is not involved in the formation
of photochemical smog?
(a) Hydrocarbon (b) NO
(c) SO
(d) 0,
11
416 Water can drain easily though
A. clayey soil
B. loamy soil
c. sandy soil
D. bricks
11
417 142. Green chemistry means such reactions which
(a) are related to depletion of ozone layer
(b) reduce the use and production of hazardous
chemicals
(C) produce green colour in reactions
(d) study the reactions in plants
11
418 Greenhouse gases trap heat in the atmosphere which makes the Earth warmer. Which of these groups consists of greenhouse gases that cause most harm?
A. Methane, Carbon dioxide, Nitrous oxide
B. Nitrogen, Oxygen, Methane
c. Ozone, Carbon monoxide, Helium
D. Water vapour, Nitrogen, ( C F C s )
11
419 58. Burning of fossil fuels is the main source of which of
the following pollutants?
bis (a) Nitrogen oxide (b) Nitric oxide
(c) Nitrous oxide (d) Sulphur dioxide
11
420 59. Which of the following is a primary pollutant?
(a) PAN
(b) CO
(c) Aldehydes
11
421 Air is a mixture. Prove this statement. 11
422 Soil profile means
A. Composition of the soil
B. Texture of the soil
C. Layers of the soil
D. None of the above
11
423 . 47 Green plants use carbon dioxide for photosynthesis and return oxygen to
the atmosphere, even then carbon dioxide is considered to be responsible
for green house effect. Explain why?
11
424 0. 10 The pollutants which come directly in the air from sources are called
primary pollutants. Primary pollutants are sometimes converted into
secondary pollutants. Which of the following belongs to secondary air
pollutants?
(a) CO
(b) Hydrocarbon
(c) Peroxyacetyl nitrate
(d) NO
With
tam radila
11
425 Pesticides and fertilizers should be
applied on croplands only in limited amounts because it helps in control of
A. soil pollution
B. water pollution
c. thermal pollution
D. all of above
11
426 The soil layer is made up of :
A. R Horizon
B. A Horizon
c. B Horizon
D. C Horizon
11
427 The gas responsible for causing Bhopal
tragedy was:
A. methyl isocyanate
B. potassium isothiocyanate
c. sodium isothiocyante
D. ethyl isothiocyante
11
428 Which of the following is not a method for the disposal of hazardous wastes?
A. Isv
B. Landfills
c. Deep-will injection
D. Surface impoundments
11
429 Pollution of lakes and rivers affects
aquatic life. Fish cannot live in water
that has oxygen less than 4 milligrams per liter. Other freshwater aquatic life (including anaerobic bacteria) also cannot survive without adequate oxygen.’BOD’ stands for:
A. Biological oxygen demand
B. Bacterial oxygen deficit
c. Basic oxygen demand
D. Building oxygen deposits
11
430 Q5. Which zone is known as ozonosphere? 11
431 Select the correct statements about
greenhouse gases:
A. Carbon dioxide is the only gas in the atmosphere which causes global warming.
B. The greenhouse gases trap heat and do not allow heat to escape into outer
space
C. Water vapours do not contribute to the greenhouse effect.
D. The presence of excessive greenhouse gases in the atmosphere is responsible for global warming.
A. A and B
B. B and D
c. ( c ) and ( B )
D. D and A
11
432 Choose the correct statement(s).
This question has multiple correct options
A. Aldrin is used as a pesticide.
B. The maximum permissible limit of nitrate in water is 50 ppm.
C. The maximum permissible limit of fluoride is 6 ppm.
D. All of the above
11
433 Match the Column I and Column II and
pick the correct matching from the codes given below.
11
434 64. Photochemical smog is formed in
(a) summer during day time
(b) summer during morning time
(c) winter during morning time
(d) winter during day time
11
435 How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?
A. More branching leads to biodegradability
B. More branching leads to non-biodegradability
C. No effect
D. None of these
11
436 Q. 32 Ozone is a gas heavier than air. Why does ozone layer not settle down
near the earth?
11
437 Which of the following activity causes water depletion?
A. Increasing population
B. Increasing industries
c. Agricultural activities
D. All of the above
11
438 Study the given flowchart and identify
( boldsymbol{K}, boldsymbol{L}, boldsymbol{M} ) and ( boldsymbol{N} ) respectively
*Produced from burning of coal and diesel
**Given off by petrol engines
A. Carbon dioxide, nitrogen oxides, methane, sulphur dioxide
B. Carbon monoxide, methane, sulphur dioxide, nitrogen oxides
C. Methane, carbon monoxide, carbon dioxide, sulphur dioxide
D. Sulphur dioxide, carbon monoxide, methane, nitrogen
11
439 216. Stone-cancer (as stone-leprosy) of Taj Mahal is due to
formation of
(a) Cacoz (b) Caso
(c) Ca(OH),
(d) Ca(HCO,), one)
11
440 The word missing (X) on the left side of the given fi
the given figure
Green Chemistry
Waste
Material
(X
Risk
)
Environmental
impact
Cost
(a) enhancing
(c) facilitating
(b) reducing
(d) awareness
11
441 98. Classical smog occurs in places of:
(a) excess CO2 (b) cool and humid
(c) warm, dry and sunny(d) excess NH,
11
442 Cutting of trees decreases:
A. pollution level
B. temperature
C. fertility of soil
D. carbon dioxide level
11
443 4. BOD is a measure of
(a) Organic pollutant in water
(c) Particulate matter in water
(b) Inorganic pollutant in water
(d) All of the above
11
444 Which of the following water pollutants encourage the formation of algae?
A . Insecticides
B. Heavy metals
c. Plant nutrients
D. Sediments
11
445 The treated water has a very low level of organic material and suspended matter. It is discharged into
A . sea
B. a river or into the ground
c. both ( A ) and ( B )
D. none of the above
11
446 Maximum prescribed limit of ( M n ) in
drinking water is:
A. 0.005 ppm
B. 0.05 ppm
c. 0.0005 ppm
D. 5 ppm
11
447 105. Which disinfectant cannot be used in drinking water?
(a) Potassium permanganate
(b) Bleaching powder
(c) Chlorine
(d) Phenol
11
448 Q. 24 What are biodegradable and non-biodegradable pollutants? 11
449 Use of pesticides decreases water
pollution
A. True
B. False
11
450 is an environment-friendly product and better than halons which
are used to extinguish fire.
A. Ibuprofen
B. Pyrocool
c. Carcinogen
D. Carbon-dioxide
11
451 2. Smog is essentially caused by the presence of
(a) Oz and N,
(b) 0, and N,
(c) oxides of sulphur and N,
(d) 0, and 03
(AIEEE 2004
11
452 Water treatment plants should be installed in all
A. desert
B. residential
c. industrial
D. none of the above
11
453 Fungi and bacteria grow mostly in
A. subsoil
B. Top soil
c. Bedrock
D. All of the above
11
454 The main problem caused by the use of
pesticides is
A. Their residues persist in water and other components of the environment.
B. Mosquitoes have become resistant to DDT.
C. They kill silk worm.
D. They deform the gills of some fishes.
11
455 Permanent hardness of water may be
removed by the addition of:
A. sodium carbonate
B. alum
c. potassium permanganate
D. lime
11
456 What is the source of micro-organisms as water pollutant?
A. Chemicals used for killing insects, fungi and weeds
B. Domestic sewage
c. Mining of uranium containing minerals
D. chemical fertilizers
11
457 Q. 49 A farmer was using pesticides on his farm. He used the produce of his
farm as food for rearing fishes. He was told that fishes were not fit for
human consumption because large amount of pesticides had
accumulated in the tissues of fishes. Explain how did this happen?
11
458 Which of the following is a measurement of water pollution?
A . PSC
в. РСВ
( c . ) во
D. coo
11
459 Q. 15 The acids present in acid rain are ………
(a) Peroxyacetylnitrate
(b) H.CO
(c) NHO
(d) H2SO4
11
460 37. The lowest region of atmosphere in which the human
beings along with other organisms live is called
(a) stratosphere (b) troposphere
(c) trapezium
(d) universe
11
461 soil holds highest water capacity
A. sandy
B. Clayey
c. Loamy
D. Both A and C
11
462 The correct match is :
A. A-2, B-1, C-4, D-5
B. A-3, B-2, C-5, D-1
c. ( A-4, B-3, C-1, D-2 )
D. A-1, B-2, C-4, D-3
11
463 233. Presence of which fuel gas in exhaust fumes shows
incomplete combustion of fuel?
(a) Sulphur dioxide
(b) Carbon monoxide and water vapour
(c) Carbon monoxide
(d) Nitrogen dioxide
11
464 Sketch the cross section of soil and
label the various layers.
11
465 What is soil erosion?
A. It is the process by which soil is formed
B. A harmful process that involves the removal and transport of soil by wind and water
C. A natural method of filtering harmful pollutants
D. A process often referred to as the greenhouse effect
11
466 The region in atmosphere containing water vapour is:
A. thermosphere
B. stratosphere
c. troposphere
D. mesosphere
11
467 Q9. What is BOD? 11
468 Which of the following are responsible
for causing acid-rain?
A. Oxides of sulphur and carbon dioxide.
B. Oxides of nitrogen and carbon monoxide.
C. Hydrogen sulphide and carbon dioxide.
D. Oxides of sulphur and nitrogen.
11
469 Green chemistry deals with:
A. study of plant physiology
B. study of extraction of natural products from plants
C. detailed study of reactions involved in the synthesis of chlorophyll
D. utilization of existing knowledge base for reducing the chemical hazards along with developmental activities
E. synthesis of chemical compounds using green light
11
470 Formation of ozone hole is maximum
over
A. India
B. Australia
c. Antarctica
D. Europe
11
471 Which of the following is major sink for carbon monoxide?
A. water
B. Soil
c. Animal respiration
D. Salts dissolved in ocean water
11
472 What causes the global warming?
A. Burning of fossil fuels
B. Deforestation
c. Industrialization
D. All of the above
11
473 Q14. Do you observe any soil pollution in your neighbourhood? What efforts will you make for
controlling the soil pollution?
11
474 Soil has five components. The
proportions of different components are
A. Mineral Matter- ( 40 % ), Organic Matter- ( 10 % ), Soil Moisture ( -25 % ), Soil Atmosphere ( -25 % ), Soil OrganismVariable
B. Mineral Matter- ( 40 % ), Organic Matter- ( 10 % ), Soil Moisture ( -25 % ), Soil Atmosphere ( -25 % ), Soil Organism( 10 % )
C. Mineral Matter- ( 40 % ), Organic Matter- ( 10 % ), Soil Moisture ( -35 % ), Soil Atmosphere ( -25 % ), Soil Organism( 10 % )
D. Mineral Matter-30%, Organic Matter-20%, Soil Moisture ( -25 % ), Soil Atmosphere ( -25 % ), Soil Organism( 10 % )
11
475 Write the future products of Green
chemistry.
11
476 Q. 31 How is ozone produced in stratosphere? 11
477 Which chemical substance is a
greenhouse gas that scientists link to
global climate change? This question has multiple correct options
A. Nitrogen oxides
B. Leadd
c. Carbon dioxide
D. DDT
E. Nitrates
11
478 195. In stratosphere CFCs get broken down by the action of
powerful UV radiation releasing:
(a) CH
(c) Ċi
(b) CIO
(d) CFCI,
11
479 185. Which are natural sinks for CIO radicals in other parts
of stratosphere?
(a) so, and NO (b) NO and NO
(C) CH, and NO, (d) Cl, and F
11
480 How much ( % ) of the atmosphere’s mass is contained in the troposphere?
A . 20
B. 80
( c .50 )
D. 60
11
481 To determine BOD value, what is the time period of sample for incubation?
A. 4 hours
B. 2 hours
c. 3 days
D. 5 days
11
482 29. Out of so,, CO, O2, NO and peroxyacetyl nitrate
(PAN), primary and secondary pollutants are
Primary
Secondary
(a) SO, 02, NO CO, PAN
(b) SO, NO PAN, O2, CO
(c) SO, CO, NO
PAN, O,
(d) PAN, Oz SO,, CO, NO
11
483 Cochineal insects have proved very useful for the control of
A . Eicchornia
B. cactus
c. weeds
D. Parathenium
11
484 Which is more hazardous to human
health?
A. Pyrethrum
B. DDT
c. Rotenone
D. Humulin
11
485 In which year the first ozone hole was
discovered?
A . 1980
в. 1983
( c cdot 1985 )
D. 1990
11
486 The gases associated with the green
house effect is:
A. ( C O_{2} )
в. ( O_{2} )
c. methene
D. ( C O )
11
487 What is the abundance of oxygen in the universe?
A. 2nd most common element, by mass
B. 3rd most common element, by mass
c. 5th most abundant element, by mass
D. oxygen is relatively rare in the universe
11
488 reduces toxicity,
minimizes waste, saves energy, and cuts down on the depletion of natura resources. It allows for advances in
chemistry to occur in a much more
environmentally benign way
A. Green chemistry
B. Green revolution
c. waste management
D. None of the above
11
489 Which one of the following is the main cause of land degradation in Punjab?
A. Intensive cultivation
B. Deforestation
c. over irrigation
D. Overgrazing
11
490 Which of the following actions will help to reduce pollution?
Composting kitchen and garden waste
2. Using unleaded petrol in cars
3. Spraying pesticides on plants to kill
pests
4. Littering chocolates and biscuits
wrappers
A . 1 and 2
B. 3 and 4
C. 1,2 and 3
D. 1,2 and 4
11
491 123. Deficiency of (F) in drinking water causes tooth decay.
Its International Standard limit makes the enamel on
tooth much harder by converting hydroxyapatite into
much harder
(a) Ca(PO2)2. CaF (b) Ca,(PO), 3CaF,
(c) 3Caz(PO2)2. CaF, (d) 3Caz(PO 22.3CaF,
11
492 The function of sedimentation tank in
sewage treatment is to:
A. disinfect the sewage
B. aerate the sewage
c. remove water content
D. remove suspended solids
11
493 ‘Thermal pollution’ means dumping heat in an ecological system, like a lake or a pond. Thermal power plants have to
throw some heat into a ‘sink’ because of
they:
A. get overheated
B. have special anti-pollution laws
c. follow the local sanitation laws
D. follow the second natural law of thermodynamics
11
494 Carbon dioxide and methane are the
two major components of greenhouse.
A. True
B. False
11
495 Which of the following is an example of non-biodegradable detergent?
( A )
[
mathrm{CH}_{3}-left(mathrm{CH}_{2}right)_{mathrm{n}}-sqrt{1}-mathrm{s} mathrm{O}_{3} mathrm{Na}
]
в.
[
left.mathrm{CH}_{3}-left(mathrm{CH}_{2}right)_{9}-underset{mathrm{CH}_{3}}{mathrm{CH}}-sqrt{prime}_{-}rightrangle-mathrm{SO}_{3} mathrm{Na}
]
( c )
D. ( C H_{3}-left(C H_{2}right)_{10}-C H_{2}-O S O_{3} N a )
11
496 Maximum prescribed limit of Fe in drinking water is:
A. 0.1 ppm
B. 0.2 ppm
c. 0.5 ppm
D. ( 0.2 mathrm{ppb} )
11
497 Q14. Why is acid rain considered as threat to Taj Mahal?
Ano Aide procentinaid
11
498 .6 Sewage containing organic waste should not be disposed in water bodies
because it causes major water pollution. Fishes in such a polluted water
die because of
(a) large number of mosquitoes
(b) increase in the amount of dissolved oxygen
(c) decrease in the amount of dissolved oxygen in water
(d) clogging of gills by mud
for cuintin life Organic waste is oxidised by
11
499 Tropical cyclones that originate in the Chine sea are?
A. Hurricanes
B. Typhoons
c. Tornadoes
D. Cyclones
11
500 Component of smog is
( A cdot O_{3} )
B. PAN
c. PPN and PBN
D. Both A and B
11
501 What do you mean by the following:
i. Sewage
ii. Eutrophication
iii. Recycling
11
502 Q7. What is the nature of classical smog? 11
503 Q. 10. What do you mean by viable and non-viable particulates? 11
504 Which of the following is regarded as the main cause of groundwater
contamination?
A . agricultural products
B. Iandfills
c. septic tanks
D. All of the above main sources of ground water contamination
11
505 What will happen if chemical fertilizers are used for a longer time.
A. soil always stays fertile for plant growth
B. soil fertility is damaged
c. soil stops responding to fertilizers
D. soil health is maintained
11
506 132. Soybean is used to replace traditional inks in printer
cartridges highlighting which of the green chemistry
principles?
(a) Use of renewable feedstocks
(b) Atom economy
(c) Reduce derivatives
(d) Prevent waste
11
507 Carbon dioxide is the major component
of greenhouse gases.
A. True
B. False
11
508 State True or False.
Deforestation increases the chances of
natural calamities
A. True
B. False
11
509 Greenhouse effect is a major cause of:
A . global warming
B. reduction of temperature
c. acid rain
D. all of above
11
510 Assertion
Presence of green plant is essential for
greenhouse effect.
Reason
Chlorophyll of green plants cause greenhouse effect.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
511 Which of the following is/are correct statement(s) regarding agricultural
activities as a reason for water
scarcity? This question has multiple correct options
A. A majority of farmers in India depend upon rains for irrigating their crops.
B. Irrigation systems such as canals are there only in a few places
c. Even these systems may suffer from lack of water due to erratic rainfall
D. Farmers have to use groundwater for irrigation
11
512 Which pair of compounds would make
an NPK fertiliser?
A. Ammonium sulfate and potassium phosphate
B. Calcium hydroxide and ammonium nitrate
C. Calcium phosphate and potassium chloride
D. Palcium phosphate and potassium chloride
11
513 Earth’s greenhouse effect causes:
A. warmer surface temperatures
B. cooler surface temperature
C. there is no change in surface temperature
D. None of these
11
514 219. Out of PAN, H,CO2, H,SO, and HNO, acid rain
contains
(a) PAN, H,CO, (b) H2SO4, HNO,
(c) PAN, HNO3 (d) PAN, H,SOZ
11
515 The BOD value of municipal sewage is:
A. ( 1-5 ) ppm
B. 5-10 ppm
c. ( 50-100 ) ppm
D. 100-4000 ppm
11
516 The gas emitted by supersonic jet planes that slowly depletes the concentration of ozone layer is
A. ( C O )
B. ( N O )
( c cdot s O_{2} )
D. ( O_{2} )
E . ( H F )
11
517 Brown mottling of teeth occurs when
( F^{-} ) ion concentration in drinking
water becomes:
A. less than 1 ppm
B. greater than 1 ppm
c. greater than 5 ppm
D. it does not depend on ( F^{-} ) ion concentration
11
518 205. A sample of air turns lime water milky and also turns
acidified potassium dichromate green in aqueous
solution has low pH. This is due to the presence of
pollutants
(a) CO2
(b) SO,
(c) Both (a) and (b) (d) None of these
11
519 138. CH CHO can be prepared by
(1) CH,COCl + H2PaBaSO4_→ CH,CHO + HCI
(II) CH2 – CH2 + 02 –
Pd(II)/Cu(II)
In water
2
Which of the above is in accordance with NGT rules?
(a) Only II
(b) Only I
(c) Both (a) and (b) (d) None of these
11
520 If all the vegetation in the pond died,
what effects would it have on the
animals? Why?
11
521 Which is responsible for ozone
depletion?
A . ( C F C s )
B. Hydrocarbons
( c cdot C O_{2} )
D. ( C O )
11
522 Distinguish between the following. Water pollution – Land pollution. 11
523 Which oxides cause acid rains?
A. Sulphur dioxide
B. Nitrogen oxide
C. Carbon dioxide
D. Both A and B
11
524 Which of the following crop is not grown in clayey soil?
A. Wheat
B. Gram
c. Paddy
D. cotton
11
525 Q13. List out the gases which are considered as major source of air pollution. 11
526 Q8. What are the harmful effects of photochemical smog and how can they be controlled?
111
11
527 Photochemical smog is related to the pollution of
A. Soil
B. water
c. Noise
D. Air
11
528 Q10. What do you mean by ozone hole? What are its consequences?
Las in the blar
11
529 What do you mean by Biochemical Oxygen Demand (BOD)? 11
530 Which of the following layer has more minerals?
A. A-Horizon
B. B-Horizon
c. C-Horizon
D. Both A and C
11
531 209. 1000 L of air at STP was dissolved in water and required
2.5 x 10-5 moles of KMnO, for complete reaction of
SO, as pollutants. Thus, SO, content in air is
(a) 1.4 ppm
(b) 14 ppm of an
(d) 6.25 ppm
to
(C) 2.8 ppm
11
532 Pollution is mainly caused by:
A. increase in population and decrease in natural
resources
B. industrialisation
C. urbanization and deforestation
D. all the above
11
533 Which of the following is a recently originated problem of environment?
A. Ozone layer depletion
B. Green house effect
c. Global warming
D. All of the above
11
534 5. The gas which reacts with haemoglobin in blood is
(@) CO
(b) SO2
(c) CO₂
(d) NO2
11
11
535 188. Leaded petrol used to be the primary source of air-borne
lead emission. This problem has been overcome by
(a) using TEL loaded petrol
(b) using ethanol-mixed petrol
(c) using unleaded petrol
(d) Using MTBE loaded petrol
11
536 8. Which of the following will increase the BOD of water supply?
(a) Oz
(b) C H OH (c) HO
(d) CO2
11
537 Long term usage of insecticides results
in
A. Sensitivity in insects
B. Kills insects
c. Resistance in insect
D. Decrease in insect population
11
538 215. Which of the following statements is not true about
classical smog?
(a) Its main compounds are produced by the action of
sunlight on emissions of automobiles and factories
(b) Produced in cold and humid climate
(c) It contains compounds of reducing nature
(d) It contains smoke, fog and sulphur dioxide
11
539 Green house gas among the following is/are:
A. carbon dioxide
B. nitrogen oxides
c. methane
D. all of the above
11
540 Which of the following statements about Radioactive pollution are correct?
1. It causes genetic changes in the animals.
2. It causes disbalance among different minerals in the soil.
3. It hinders blood circulation.
4. It causes cancers.
Select the correct answer from the
codes given below:
A . 1 and 2
B. 1 and 4
c. 1,3 and 4
D. 2, 3 and 4
11
541 affect the soil profile and bring changes in soil structure.
A. Vegetation
B. Animals
c. climatic factors
D. Fertilizers
11
542 Ozone-layer is getting depleted because of:
A. excessive use of automobiles
B. excessive formation of industrial units
c. excessive use of man-made compounds containing both fluorine and chlorine
D. excessive deforestation
11
543 43. Select the correct statement(s) about stratosphere.
(a) Temperature increases slowly from 220 to 270 K
(b) Supersonic aircrafts fly in the lower region of the
stratosphere
(c) Both (a) and (b)
(d) None of these
11
544 hy
200. Which of the following reactions will deplete O3 layer?
(a) HOCI_bv ,oh+ċi
(b) CI, hv>2ċi
(C) CF,CI,_bv , CF CI+ CI
(d) All of these
hv
11
545 The water temperature should
preferably be less than ( _{–} ) degree
Celsius.
A . 10
B. 25
c. 15
D. 30
11
546 Ozone in stratosphere is depleted by
A ( cdot C F_{2} C l_{2} )
в. ( C_{7} H_{16} )
c. ( C_{6} H_{6} C l_{6} )
D. ( C_{6} F_{6} )
11
547 Among the following, which do not come
under the category of sewage
treatment?
A. The organic material present in the waste is allowed to undergo microbial oxidation
B. Large size material are filtered through screen
C. The waste water is suitably treated for the removal of phosphate by the coagulation method
D. Degrading the number of toxic organic waste
11
548 “Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up ( _{–} ) of the atmosphere.”
A . 21%
в. 22%
c. 23%
D. 24%
11
549 Which of the following is not an
objective of Green chemistry?
A. It is better to prevent waste than to treat or clean up waste after it has been created
B. The use of auxiliary substances (e.g., solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used.
C. Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure.
D. None of the above
11
550 44. Ultra violet light of Sun’s radia-
tion is prevented from reaching
the earth’s atmosphere by the
layer of
(1) Oxygen (2) Hydrogen
(3) Ozone (4) Helium
11
551 According to The United States Geological Survey, water having less than ( 1000 mathrm{mg} / ) litre of total dissolved
solids is:
A. fresh water
B. slightly saline
c. moderately saline
D. brine water
11
552 14. So, as pollutant can be controlled by
(I) using solar energy, nuclear energy, hydroelectric
energy.
(II) low sulphur fuels, natural gas.
(III) desulphonation of high sulphur coal and oil before
burning by FGD.
(IV) using water under high pressure.
Correct methods are
(a) Both I and II (b) Both I and III
(c) I, II and IV (d) I, II and III
11
553 95. Most hazardous metal pollutant of automobile exhauste
is:
(a) mercury
(b) cadmium
(c) lead
(d) copper
11
554 127. Business benefits of green chemistry include
(a) reduced costs associated with waste treatment and
disposal
(b) innovating ‘greener’ products to customers
(c) greater compliance with environmental legislation
(d) All of the above
11
555 Q. 17 Green house effect leads to global warming. Which substances are
responsible for green house effect?
11
556 Which of the following is responsible for soil erosion in farms?
A. Rivers and wind work
B. Defective methods of farming
c. Flowing water
D. Moving glaciers
11
557 Ammonium nitrate ( left(N H_{4} N O_{3}right. )
phosphorus as ( P_{2} O_{5} ) and potassium
as ( K_{2} O ) is called :
A . organic manure
B. mixed fertilizers
c. insecticides
D. pesticides
11
558 57. Mesopause represents the point of temperature inversion
between
(a) troposphere and stratosphere
(b) troposphere and mesosphere
(c) stratosphere and mešosphere
(d) mesosphere and thermosphere
11
559 Which of the following is not a green house gas?
A. Carbon dioxide
B. Water vapour
c. oxygen
D. Methane
11
560 Q. 43 Assertion (A) Ozone is destroyed by solar radiation in upper stratosphere.
Reason (R) Thinning of the ozone layer allows excessive UV radiations
to reach the surface of earth.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and R are not correct
(d) A is not correct but R is correct
11
561 What is meant by soil erosion? 11
562 Which of the following is not a major greenhouse gas?
A. Carbon dioxide
B. Methane
c. calcium carbonate
D. water vapour
11
563 Pathogens are:
A. one which kills bacteria present in our body
B. one which live on other micro-organisms
C. disease causing agents
D. good for our health
11
564 The acid rain destroys vegetation because it contains
A. Nitrates
B. ( mathrm{H}_{2} mathrm{SO}_{4} )
( c cdot 0_{3} )
D. co
11
565 Q. 19 Ozone is a toxic gas and is a strong oxidising agent even then its
presence in the stratosphere is very important. Explain what would
happen if ozone from this region is completely removed?
11
566 Which of the following are causes of industrial pollution?
A. Asbestos
B. Oils
c. Nitrates & Phosphates
D. All of above
11
567 Assertion
Agriculture output increased several
times after introduction of DDT.
Reason
DDT was the first insecticide used on a
wide scale.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.
11
568 Disease caused by eating fish found in water contaminated with industrial
waste having mercury is:
A. minamata disease
B. brights disease
c. hashimotos disease
D. osteosclerosis
11
569 Acid rain is caused by
A. industries
B. power plants
c. automobiles
D. all of above
11
570 Those gases or particles that are pumped into the air to make it unclean
are called
A. primary air pollutant
B. secondary air pollutant
c. teritiary air pollutant
D. none of above
11
571 89. Negative soil pollutant is
(a) converting fertile land into barren land by dumping
ash, sludge and garbage
(b) reduction in soil productivity due to addition of
pesticides and industrial wastes
(c) reduction in soil productivity due to erosion and
overuse
(d) none of the above
11
572 Which soil horizon contains humus?
A. A-Horizon
B. B-Horizon
c. C-horizon
D. Bedrock
11
573 222. The false statement among the following:
(a) The average residence time NO is one month
(b) Limestone acts as a sink for SO
(c) SO, can be removed from flue gases by passing
through a solution of citrate ions
(d) Ammonia acts as a sink for NO
11
574 48. Coating of solid waste with imper-
vious material is known as
(1) Encapsulation
(2) Chemical fixation
(3) Landfill
(4) Capping
11
575 The main reasons for deforestation are:
A. rapid increase in the population of human beings and their livestock
B. urbanization and human settlements
c. cutting down of trees for obtaining fuel
D. All of the above
11
576 Which of the following statements
about photochemical smog is not
correct?
A. It occurs in warm, dry and sunny climate.
B. Chemically, it is a reducing mixture and is called reducing smog.
C. It is formed as a result of action of sunlight on unsaturated hydrocarbons and nitrogen oxides.
D. It has high concentration of oxidising agents and is also called oxidising smog.
11
577 Green chemistry means such reactions
which:
A. produce colour during reactions
B. reduce the use and production of hazardous chemicals
C. are related to the depletion of ozone layer
D. study the reactions in plants
11
578 33. The major source(s) of gaseous hydrocarbons as
pollutants is/are
(a) Anaerobic decay of vegetable matter in nature
(b) Emissions from municipal sewage plants
(c) From refineries
(d) All of the above
11
579 170. Photochemical smog consists of excessive amount of X,
in addition to aldehydes, ketones, peroxyacetyl nitrite
(RCO NO,) and so forth. (X) is
(a) CH4
(b) CO
(c) 03
(d) CO,
11
580 16. What do you mean by green chemistry? How will it help in decreasing environmental pollution?
die about utilising the existing knowledad
11
581 What is one environmental problem
associated with the use of detergents?
A. Global warming
B. Eutrophication
c. Errosion
D. Photochemical smog
11
582 133. Who was a co-founder of the worldwide green chemistry
movement and the first director of the Green Chemistry
Institute?
(a) Paul Anastas (b) Albert Einstein
(c) John Warner (d) Joseph Bren
11
583 Q3. Carbon monoxide gas is more dangerous than carbon dioxide gas. Why? 11
584 What do you mean by ozone hole? What
are its consequences?
11
585 Q17. What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere?
Discuss.
hic absorbed by the green
1
11
586 Give uses of ethanol as fuel. How it
conserves fossil fuel.
11
587 Which one of the following is an
environment related disorder with
correct main cause?
A. Black lung disease is found mainly in workers of stone quarries and crushers
B. Blue-baby disease is due to heavy use of nitrogeneous fertilizers.
C. Non-Hodgkin’s Iymphoma is found mainly in worker involved in manufacture of neem-based pesticides.
D. Skin cancer occurs mainly in people exposed to benzene and methane.
11
588 The absorption of ( U V ) radiation by ( O_{3} )
A. protects the inhabitants of our planet from injurious radiation
B. maintains an equilibrium between the concentrations of ( O_{2} ) and ( O_{3} )
c. makes both the function A and B above effective
D. makes no function effective
11
589 Water pollution can be defined as:
A. Physical change in the properties of water
B. Chemical change in the properties of water
C. Biological change in the properties of water
D. All of the above
11
590 Identify the wrong statement in the
following.
A. Ozone layer does not permit infrared radiation from the sun to reach the earth
B. Acid rain is mostly because of oxides of nitrogen and sulphur
C. Chlorofluorocarbons are responsible for ozone layer depletion
D. Greenhouse effect is responsible for global warming
11
591 Use of chlorofluorocarbons is not
encouraged because:
A. they are harmful to the eyes of people that use it
B. they damage the refrigerators and air conditioners
C. they eat away the ozone in the atmosphere
D. they destroy the oxygen layer
11
592 1. Which of the following acid is most abundant in acid rain?
(a) HCI
(b) HNO3 (c) H2SO4
(d) Organic acid
TAL:
1
11.
2
11
593 What is the optimum concentration of flouride required by body?
A. 2 ppm
B. 5 ppm
c. 10 ppm
D. 1 ppm
11
594 Negative soil pollution is:
A. reduction in soil productivity due to erosion and over
use
B. reduction in soil productivity due to addition of pesticides and industrial wastes
C. converting fertile land into barren land by dumping ash, sludge and garbase
D. none of the above
11
595 Suggest four measures to check water pollution. 11
596 BOD refers to the
A. Bidding of Dermatology
B. Binding of Dirt
C. Biochemical occupied Date
D. Biochemical Oxygen demand
11
597 The maximum limit of nitrate in
drinking water is:
A. 50 ppm
B. 40 ppm
( c .10 mathrm{ppm} )
D. 100 ppm
11
598 Acid rain produced when rain mixes
with gases such as sulphur dioxides. This will eventually result in:
A. lowering of pH and change of temperature in ponds
B. raising of pH in ponds, encouraging growth of microorganisms
c. lowering of pH in ponds, limiting survival of aquatic organism
D. raising of pH in ponds, limiting development of organisms
11
599 2011 is the international year of
chemistry. “Chemistry is our life, our
future”, is the motto.
“Chemistry is not a problem but a solution” is the message of green chemistry. Explain the relevance of this message.
11
600 Ozone hole is maximum over:
A . europe
B. antarctica
( c . ) india
D. africa
11
601 Photochemical smog consists of an excessive amount of ( X ) in addition to
aldehydes, ketones, PAN etc. ( boldsymbol{X} ) is :
A. methane
B. ozone
c. carbon dioxide
D. carbon monoxide
11
602 Switching from air to pure oxygen eliminates the NO production. This is an
application of:
A. Green chemistry
B. waste management
c. Green revolution
D. none of above
11
603 Which of the following statements are true about acid rain?
(i) Acid rain is harmful to some plants and animals.
(ii) Acid rain mainly comprises the sulphuric acid and nitric acid
(iii) Acid rain helps farmers to produce
more crops.
(iv) Acid rain corrodes buildings and
statues.
A ( cdot ) (i) and (ii)
B. (i) and (iii)
( c cdot ) (i), (iii) and (iv)
D. (i), (ii) and (iv)
11
604 Q3. What is photochemical smog? What are its effects? How can it be controlled? 11
605 This process in which nutrient enriched
water bodies support a dense plant population, which kills animal life by depriving it of oxygen and results in subsequent loss of biodiversity is known as
A. green-house effect
B. eutrophication
c. land pollution
D. none of above
11
606 Green chemistry is:
A. way of thinking and utilising the existing knowledge and principles of chemistry and other sciences
B. study of plants for making the environment clean
C. both ( A ) and ( B )
D. None of the above
11
607 128. The word is synonymous with green chemistry and also
means harmless, or gentle and not life-threatening?
(a) Benign
b) Sustainable
(c) User friendly (d) Greenness
11
608 Which of the following is affected by acid rains?
A. Infrastructure
B. Aquatic life
c. Plants
D. All of the above
11
609 “Solving the problem of pollution is an effective way of environmental management” Justify the statement 11
610 Which of the following industries may be a reason for water scarcity?
A. Chemical industry
B. Pharmaceutical industry
C. Textile industry
D. All of the above.
11
611 Q12. Have you ever observed any water pollution in your area? What measures would you suggest
to control it?
11
612 28. Air is said to be saturated when :
(1) it contains maximum content
of water vapour
(2) its pressure is minimum
(3) its thickness is maximum
(4) it blows over the barren land
11
613 Which of the following is not present in
Water?
A. Antimony
B. Arsenic
c. Benzene
D. Bismuth
11
614 What are the advantages of chlorofluorocarbons?
A. Excellent refrigerants
B. Very good propellants
c. Useful in firefighting
D. All of the above
11
615 The most significant sources of water
pollution
A. waste water from domestic and industrial processes
B. agricultural process
c. oil spillage
D. all of the above
11
616 Industrial waste include:
A. chemical solvents, paints
B. sandpaper, paper products
C. industrial by-products, radioactive waste
D. all the above
11
617 Which of the following statements is
true about acid rain?
A. Acid rain will erode marble statues
B. Acid rain can change the pH of lakes and streams
C. Acid rain can be formed from carbon dioxide
D. Acid rain creates holes in the ozone layer
E. All of the above
11
618 77. Acid rains are produced by
(a) excess NO, and So, from burning fossil fuels
(b) excess production of NH, by industry and coal gas
(c) excess release of carbon monoxide by incomplete
combustion
(d) excess formation of Co, by combustion and animal
respiration
11
619 Which of the following products have green chemistry approach?
A. Ibuprofen
B. Surfactant
c. Propene
D. All of the above
11
620 Sewage is a complex mixture
containing suspended:
A. solids organic and inorganic nutrients
B. organic impurities only
C. inorganic impurities only
D. all of the above
11
621 Rich in lather, mixed with oil, blackbrown water that goes down the drains from ( _{text {一一一一一一一一 }} ) is dirty. It is called
waste water.
A. sinks
B. toilets, showers
c. laundries
D. all of the above
11
622 Which of the following is not a water pollutant?
A. Metal nitrates
B. Sewage
c. oxygen
D. Human excreta
11
623 Which one of these is a herbicide?
A . DDT
в. ВНС
c. Dioxin
D. Dieldrin
11
624 One of the soil pollutants is
A. radioactive substances
B. pesticides
C. herbicides
D. all of above
11
625 163. Smog can be controlled by
(a) use of catalytic converters in automobiles
(b) setting the air-fuel ratio in engine in such a way to
produce some CO and unburnt hydrocarbons
(c) Both (a) and (b)
(d) None the above
11
626 121. Iron and manganese present in water are removed by
(a) chlorination (b) aeration
(c) filtration
(d) lime soda treatment
11
627 Very Short Type Question How is ozone important for us? 11
628 Q. 48 Explain how does green house effect cause global warming?
Ans Visible light from
11
629 One way of preventing pollution of the air is by passing exhaust gases through a filter. Glass fibre or silicone-treated
bags of textile material are used for
filtering.
A. Hot gases
B. High pressure gases
c. cold gases
D. Reactive gases
11
630 The gas that is not considered as a
green house gas’ is:
A. ( C O_{2} )
в. ( C H_{4} )
( c cdot O_{2} )
D. ( O_{3} )
11
631 Which liquid is found on the feather of birds and animal fur? 11
632 104. Which of the following is false?
(a) Photochemical smog has high concentration of
reducing agents and is, therefore, called as reducing
smog.
(b) Non-viable particulates consist of smoke, dust, mist,
Is brfumes etc.
(c) Classical smog occurs in cool humid climate and it
is mixture of smoke, fog and sulphur dioxide.
(d) Ozone reacts with unburnt hydrocarbons in polluted
air to produce peroxyacetyl nitrate (PAN).
11
633 The major air pollutant is:
A. ( C O )
B. oxides of nitrogen
( c . ) soot
D. oxides of sulphur
11
634 The increase in temperature on the earth disturbs the water cycle and
reduces rainfall. The situation may lead
to:
A. floods
B. droughts
c. increased level of ( C O_{2} )
D. all of the above
11
635 Biomass is used instead of extensive
use of petroleum. This is an application
of :
A. Green revolution
B. waste management
c. Green chemistry
D. revolution resource recover
11
636 What is the cause of Green house
effect?
A. Infrared rays
B. Ultraviolet rays
c. x-rays
D. Radio waves
11
637 Green chemistry means such reactions
which –
A. are related to the depletion of ozone layer
B. study the reactions in plants
c. produce colour during reactions
D. reduce the use and production of hazardous
chemicals
11
638 Corrosion of statues and monuments
occurs due to
A. Photochemical smog
B. Carbon monoxide
c. Acid rain
D. Methane
11
639 Among the following compounds, which one is not responsible for the depletion of ozone layer?
A ( cdot C H_{4} )
в. ( C F C l_{3} )
c. ( C H C l_{3} )
D. ( C l_{2} )
11
640 4. Which one of the following statements is not true?
(a) Oxides of sulphur, nitrogen and carbon are the most
widespread air pollutant.
(b) pH of drinking water should be between 5.5 and 9.5.
(c) Concentration of DO below 6 ppm is good for the
growth of fish.
Clean water would have a BOD value of less than
5 ppm.
(AIEEE 2011)
11
641 Q18. Give the examples of insecticides. 11
642 Q. 39 Assertion (A) Green house effect was observed in houses used to grow
plants and these are made of green glass.
Reason (R) Green house name has been given because glass houses are
made of green glass.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and R are not correct
(d) A is not correct but R is correct
11
643 Assertion(A): The temperature in
the stratosphere increases with
altitude.
Reason(R): Ozone present absorbs
ultraviolet radiation which is converted
into heat.
Choose the correct option from the
following:
A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not correct explanation of Assertion
C. Assertion is true and Reason is false
D. Assertion is false and Reason is true
11
644 Which of the following layer of the soil contains more humus?
A. Top soil
B. Subsoil
c. Bedrock
D. None of the above
11
645 Which of the following layer of soil is called as zone of leaching?
A. ( A_{0} )
B. ( A_{00} )
c. ( A_{2} )
D. ( A_{1} )
11
646 The correct statements among the
following is:
A. fly ash is generated by steel industry
B. green chemistry is concerned about minimum pollution
C . green fuel is that obtained from plastic wastes
D. All of the above
11
647 Discharge of industrial waste into the
soil causes
A. soil pollution
B. air pollution
c. water pollution
D. all of above
11
648 Q.2 Photochemical smog occurs in warm, dry and sunny climate. One of the
following is not amongst the components of photochemical smog, identify it.
(a) NO2
(b) O
(c) SO2
(d) Unsaturated hydrocarbon
11
649 110. DDT is represented chemically as
Н СІ
(a) C12
(_C1
AĆI
09
(6) rica
(c) C1-
C1
СІ СІ
(d) None of these
11
650 Which of the following statements
about ozone is true?
A. Ozone layer is benifical to us because ozone cuts the ultraviolet radiationof the sun
B. The conversion of ozone to oxygen is an endothermic reaction
C. Ozone is triatomic linear molecule
D. Ozone layer is harmul as it cuts out radiation useful for photosynthesis
11
651 The current synthesis of poly-carbonate is an application of:
A. green revolution
B. green chemistry
C. waste management
D. none of above
11
652 3. The aromatic compounds present as particulates are
(a) Benzene
(b) Toluene
(c) Nitrobenzene
(d) Polycyclic aromatic hydrocarbons
11
653 Ozone higher up in the atmosphere acts as a shield to prevent UV rays from reaching the Earth’s surface These UV
rays are responsible for which of the following diseases?
(i) Skin cancer
(ii) Eye damage
(iii) Lung cancer
(iv) Damage to immune system Colour blindness
A . (i), (ii) & (iii)
B. (i), (ii), (iv) & (v)
( c cdot(i),(text { iii) },(v) )
D. (i), (ii), (iii), (iv) & (v)
11
654 Over a number of years the average pH
of a stream changes from a pH of 6.9 to a pH of 5.9 due to acid rain. Which statement is true about the pH of the
stream?
A. The pH of the stream now is one times more acidic than it was years ago
B. The stream now has 10 times more hydroxide ions than it did years ago
c. The pH of the stream is now 10 times more acidic than it was years ago
D. The stream is more basic now than it was years ago
E. The concentration of hydronium ion in the stream has decreased over the years
11
655 Methods used for the management of waste is/are:
A. recycling
B. incineration
c. digesting
D. all of the above
11
656 Argon is a greenhouse gas.
A. True
B. False
11
657 In the soil profile, which layer is harder and more compact?
A. Bedrock
B. Subsoil
c. Surface soil
D. Parent rock
11
658 Among the following, the one which is not a “greenhouse gas”, is:
A ( cdot N_{2} O )
в. ( C O_{2} )
( mathrm{c} cdot mathrm{CH}_{4} )
D. ( O_{2} )
11
659 “The final Agent Orange raid in Vietnam took place in 1970 areas
have begun to bloom in 1970. But 19
years after the war’s end, it seem plain that Agent Orange is killing and maiming human beings, something it never intended to do. The apparent toxic fallout from those clouds ( _{—} ) is a crop
of human miseries including cancers, miscarriages and birth defects – that
may persist for decades.” The offensive substance referred to in
this quotation is
A. A complex minute of DDT and other insecticides used as aerial sprays for protection against malaria and other tropical diseases
B. A complex mixture of herbicides and weedicides used to increase agricultural output in the South Vietnam under the U.S. aid programme
c. Dot used as an insecticide
D. Dioxin used as defoliants
11
660 The study of the vertical section of the
layers of the soil is known as
A. Soil study
B. Soil profile
c. Soil layering
D. Soil weathering
11
661 Most harmful pesticide is
( A cdot 2,4-D )
в. ( 2,4,5- ) –
c. DDT
D. PAN
11
662 The greenhouse effect is useful
because:
A. it reduces water pollution
B. it increases normal temperature of earth
c. keeps the temperatures on our planet mild and suitable for living things
D. reduces greenhouse gases
11
663 The full form of LDPE is low-density polyester, which is monomer of first grade unit.
A. ester
B. alcohol
c. ether
D. phenol
11
664 We need fresh air for breathing. Some sources that cause pollution of air are mentioned here. Can you pick the false one?
A. Coal fires
B. Heavy rain
c. volcanoes
D. Forest fires
11
665 Which of the following practices will not
come under green chemistry?
A. If possible, making use of soap made of vegetable oils instead of using synthetic detergents.
B. Using ( H_{2} O_{2} ) for bleaching purpose instead of using chlorine based bleaching agents.
C. Using bicycle for travelling small distances instead of using petrol/diesel based vehicles.
D. Using plastic cans for neatly storing substances.
11
666 Q. 44 Assertion (A) Excessive use of chlorinated synthetic pesticides causes
soil and water pollution.
Reason (R) Such pesticides are non-biodegradable.
(a) Both A and Rare correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and Rare not correct
(d) A is not correct but R is correct
11
667 It is a gyre of marine debris particles found by Charles Moore in the Central North Pacific Ocean. It is characterised
by exceptionally high relative concentrations of pelagic plastics, chemical sludge and other debris. What is it called?
A. Pacific trash vortex
B. The grand junk of Pacific
c. Great Pacific garbage patch
D. Both (A) and (C)
11
668 What would have happened if the green house gases were totally missing in the earth’s atmosphere? Discuss. 11
669 Which of the following is a pollutant?
A. Sooty particle
B. Sulpur-dioxide
c. carbon-monoxide
D. All of above
11
670 Q. 45 Assertion (A) If BOD level of water in a reservoir is less than 5 ppm it is
highly polluted.
Reason (R) High biological oxygen demand means low activity of
bacteria in water.
(a) Both A and R are correct and R is the correct explanation of A
(b) Both A and R are correct but R is not the correct explanation of A
(c) Both A and R are not correct
(d) A is not correct but R is correct
11
671 Which one is more effective greenhouse
( operatorname{gas}, C O ) or ( H_{2} O ? )
If the answer is ( H_{2} O ) then enter 1 , else
enter 0
11
672 Which of the following is an example of photochemical smog?
A. Ketones
B. Aldehydes
c. Ester
D. None of the above
11
673 Among the following industrial waste can be managed by :
A. recycling
B. burning of combustible waste material
c. dumping
D. all of the above
11
674 Photochemical smog is formed in:
A. summer during day time
B. summer during morning time
c. winter during morning time
D. winter during day time
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675 Which of the following is one of the gases responsible for green house effect?
A ( cdot C O_{2} )
в. ( H_{2} S )
c. ( N_{2} )
D. None of the above
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676 Which of the following reaction is not correct during the formation of acid rain?
A. ( S+O_{2} rightarrow S O_{2} )
в. ( H_{2} O+S O_{2} rightarrow H_{2} S O_{3} )
c. ( H_{2} O+S O_{2} rightarrow H_{2} S O_{4} )
( mathrm{D} cdot 2 mathrm{SO}_{2}+mathrm{O}_{2} rightarrow 2 mathrm{SO}_{3} )
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677 Which of the following represents type(s) of environmental pollution
A. Air pollution
B. water pollution
c. soil pollution
D. All of the above
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