Environmental Chemistry Questions

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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.

Environmental Chemistry Questions

List of environmental chemistry Questions

Question NoQuestionsClass
1210. 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
288. 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
3Measurement 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
4Which 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
5The 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
6A 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
7The 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
8Which 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
945. Of the following which one pol-
lutes the air of a big city ?
(1) Copper (2) Chromium
(3) Lead (4) Calcium		11
100.18 Acid rain is known to contain some acids. Name these acids and where
from they come in rain?
UNO od		11
11Q. 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
12Thermal pollution causes a decrease in dissolved oxygen Is the above statement true?
A. True
B. False		11
13The 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
14Biochemical 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
15The gas that is responsible for global warming is11
16Which 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
17Photochemical 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
18Assertion
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
19State True or False.
Forest Fires and droughts are man made causes of deforestation
A. True
B. False		11
20photochemical
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
21Consider 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
22Pollution 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
23Taking 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
24Which 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
25The 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
26BOD stands for:
A. Biochemical Oxygen Demand
B. Biological Oxygen Demand
C. Bacterial Oxidation Demand
D. Biochemical Oxidation Demand		11
27Which 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
28Q2. What is the name of the compound formed when CO combines with blood?11
29Q. 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
3078. 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
31Which one of these is not damaged due to excess lead in drinking water?
A. Kidney
B. Liver
C. Reproductive system
D. Teeth		11
32Assertion(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
33Which 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
34Identify 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
35Global 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
36Q3. Give three examples in which green chemistry has been applied.
1. … co in nlace of tetrachlos		11
37Modes 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
38When 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
39Which of them are Non-biodegradable
waste?
A. Synthetic fibers
B. Pen refills
c. silver foil
D. All of above		11
40Chlorine 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
41COD 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
42Use 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
43Which of the following gases can result
in the formation of acid rain?
A. Ozone
B. Carbon monoxide
c. Sulphur dioxide
D. chlorofluorocarbon		11
44Sludge 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
45If 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
46Green 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
47What is the link between domestic
waste and acid rain?		11
48What is green chemistry? Write one importance of green chemistry.11
49Write short notes on, (a) Biological concentration and magnification,
(b)DDT,
(C) Bordeaux mixture, (d)
IPM,
(e) Natural insecticides,
(f) Biopesticides,
(g) Bioinsecticides		11
50Addition 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
51Q. 21 On the basis of chemical reactions involved, explain how
chlorofluorocarbons cause thinning of ozone layer in stratosphere?
do		11
52What is acid rain? Mention two of its
effects.		11
53is the collective name for layers of
soil.
A. A-horizon
B. B-horizon
c. c-horizon
D. Soil profile		11
54Q. 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
55Which of the following properties of soil decreases due to deforestation?
A. Nutrient content
B. Fertility
c. Texture
D. All of the above		11
56The presence of which of the following in drinking water is responsible for
mottling of teeth?
A. Mercury
B. lodine
c. Chlorine
D. Fluorine		11
57Which 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
58Distilled water is clean and pure water, but unfit for human consumption.
A. True
B. False		11
59The first organic pesticide to be used commercially was
A. Bordeaux mixture
B. Burgandy mixture
c. DDT
D. 2, ( 4- ) D		11
60Acid 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
61Which of the following provides shelter for many living organisms?
A. A-Horizon
B. B-Horizon
c. C-Horizon
D. None of the above		11
62Q18. 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
63What constitutes smog?11
64What 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
66Q15. Give one example of organic herbicide.
An
Triazine		11
6796. 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
68Current 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
69Maximum prescribed limit of ( C u ) in
drinking water is:
( A cdot 2 p p m )
B. 1 ppm
c. 3 ppm
D. 5ppm		11
70Which of the following is the main factor of water pollution?
A. Smoke
B. Industrial waste
c. Detergent
D. Ammonia		11
71Q. 26 What is the importance of measuring BOD of a water body?11
72Eutrophication 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
73The 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
74137. Nobel prize in green chemistry is not associated with
(a) Richard R Schrock (b) Yves Chauvin
(c) Robert H Grubbs (d) R Williamson		11
7544. Smog is a combination of
(1) air and water vapour
(2) water and smoke
(3) fire and water
(4) smoke and fog		11
76Which pollutant gas is produced by the decomposition of vegetation?
A. Carbon monoxide
B. Methane
c. Nitrogen dioxide
D. Sulfur dioxide		11
77Erosion 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
78Maximum 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
79Chemical 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
80225. 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
81An 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
82What 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
83Which 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
84Which is not the green house gas among the following?
A. Chlorofluorocarbons
B. Argon
c. water vapour
D. Carbon-dioxide		11
85The non-viable particulate among the following is:
A. dust
B. bacteria
c. moulds
D. fungi		11
86116. 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
8738. Water is often treated with chlorine to
(a) Kill germs
(b) Increases
(c) Remove hardness
(d) Remove suspended particles		11
88What are the harmful effects of
photochemical smog and how can they be controlled?		11
89Carbamates are used as a
A. Insecticide
B. Herbicides
C . Fungicides
D. All of the above		11
90Which 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
91Soil 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
92Identify 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
93Water 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
94Q3. How are NO and NO, formed in the atmosphere?11
95Which of the following does not cause soil pollution?
A. Industrial wastes
B. Urban wastes
c. Agricultural practices
D. None of above		11
9692. 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
971
111. Very fine suspended and colloidal impurities are
removed by a process called
(a) softening
(b) coagulation
(c) disinfection (d) plain sedimentation		11
98Identify the non-Green House Gas (GHG) from the following
A. Methane
B. Nitrous oxide
c. sulphur hexafluoride
D. Carbon monoxide		11
99113. A common disinfectant used in village wells is
(a) potassium permanganate
(b) iodine and bromine
(c) ozone gas
(d) free chlorine		11
100A river with high BOD value is
A. Highly polluted
B. Highly clean
c. Highly productive
D. Highly conducive for pisciculture		11
1012.8 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
102Smog is formed when fog is mixed with
A. Sulphur
B. Mercury
c. smoke
D. Snow flakes		11
103Excessive 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
104Intermediate 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
105Most hazardous metal pollutant of automobile exhaust is:
A. mercury
B. tin
c. cadmium
D. leadd		11
106Photochemical smog always contains
A. aluminium ions
B. methane
c. ozone
D. phosphorus		11
10731. 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
108Which 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
109Q6. What is smog? How is classical smog different from photochemical smog?
ci		11
110Global warming could result in wide ranging effects on:
A. rainfall patterns
B. agriculture, forests
c. plants and animals
D. All of the above		11
111Which of the following is a microbial pesticide?
A. Rotenone
B. Thurioside
c. Baygon
D. Temik		11
11243. 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
113Identify 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
114Atmosphere of big cities is polluted most by :
A. Automobile exhausts
B. Radioactive fall out
c. Household waste
D. Pesticide residue		11
115Treatment 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
116Waste 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
117Classical smog is also called:
A. oxidising smog
B. reducing smog
c. photochemical smog
D. summer smog		11
118The 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
119The 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
120192. 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
121Assertion
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
122Q. 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
123Chlorine 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
124144. 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
125Underground 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
12649. The substance having the largest concentration in acid
rain?
(a) H2CO3
(c) HCl
(b) HNO,
(d) H.SO,		11
127Which soil is used in cosmetics?
A. Multani soil
B. Terracotta soil
c. Shadu soil
D. Kaolin		11
12887. Lead is
(a) air pollutant (b) noise pollutant
(c) radioactive pollutant(d) water and soil pollutant		11
129Chronic bronchitis and emphysema are
more vulnerable to:
A. acid rains
B. water pollutants
c. smog
D. nitrogen oxides		11
130In 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
131What are the major causes of water pollution? Explain.11
132In antarctica, ozone depletion is due to the formation of which of the following compounds?
A. Acrolein
B. PAN
c. PCBs
D. Chlorine nitrate		11
133Acid 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
134Q12. What is the composition of London Smog?11
135Ruchi 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
136Q.1 Which of the following gases is not a green house gas?
(a) CO
(b) 03
(c) CH
(d) H,O vapour		11
137Which 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
138Height of Stratosphere above earth’s surface in ( (mathrm{Km}) ) is:
A . ( 0-10 )
B. 10-50
c. ( 50-85 )
D. 85-100		11
139Which 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
140Air 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
141The 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
142Which 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
143We 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
144What is soil erosion?11
14506. 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
146166. Which of the following is an important part of
photochemical smog?
(a) SO2
(b) CO
(c) CO2
(d) NO,		11
147Green fuel is the fuel obtained from:
A. Bio-waste
B. Metal waste
c. Plastic waste
D. Chemical waste
E. Electronic waste		11
148What 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
149Which 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
150Which of the following cause water pollution?
A. Smoke/fly ash
B. Automobile exhausts
c. silt and pesticides
D. Aeroplanes		11
151Q17. What is PAN stands for?11
152The agricultural field that produces maximum methane gas
into atmosphere is:
A. wheat field
B. paddy field
c. cotton field
D. groundnut field		11
15311. 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
15420. 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
155Long answer type questions:
Define soil erosion, It’s cause and a few
remedial steps that can be taken to control soil erosion.		11
156Which 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
157Global 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
158Q1. What do you mean by primary and secondary pollutants of the air?
Ans Primon nollutuntum
CA		11
159Which of the following are greenhouse gases?
A. Carbon dioxide
B. Water vapour
c. Both A and B
D. None of these		11
160or using plants (such as willow) to extract heavy metals can prevent soil pollution.
A. Phytoremediation
B. Biofertilizer
c. Bioremediation
D. None of above		11
161What are the effects of acid rain ?11
1622. Which of the following causes less pollution?
(a) NO, (h) so
(c) CO2
(d) C, H,		11
163226. 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
164Q2. What is the compound formed when CO combines with blood?11
1659. Which of the following causes lung cancer?
(a) Paper
(b) Asbestos
(c) Silica
(d) Textiles		11
166The type of pollution caused by spraying DDT is:
A. air and soil
B. air and water
c. air
D. air, water and soil		11
167Pollution is:
A. removal of top soil
B. release of toxic/undesirable materials in environment
C. conservation of energy
D. all of the above		11
168soil holds plenty of air.
A. Sandy
B. Clayey
c. silt
D. Both B and C		11
169What is sewage? Explain why it is
harmful to discharge untreated sewage into rivers or seas.		11
17082. 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
171Q20. What is meant by polar vortex?11
172162. Which is not the constituent of photochemical smog?
(a) RCHO
(b) RCOR
(c) CF C12
(d) PAN
y recobetochemical smog?		11
173Which 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
17453. Atmosphere of big/metropolitan cities are polluted most
by:
(a) automobile exhausts.
(b) pesticide residue.
(C) household waste.
(d) radioactive fall out.		11
175Statement(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
176Q19. How can domestic waste be used as manure?
A		11
177Environmental 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
178Which 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
179Q1. How carbon monoxide acts as a poison for human beings?11
180139. 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
1813. Besides CO2, the other greenhouse gas is
(a) Ar
(b) N2
(c) O₂
4 BOD i		11
182Which 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
183Assertion
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
1847. 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
185Major 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
186What is bad ozone and good ozone?11
187The spores of Bacillus thuringiensis
are used as bioinsecticide. Comment.		11
188Acid 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
189Q1. What is meant by PCBs?11
190Green 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
191An 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
192What is the pollutant produced from
industries and chemical factories?
A. Sediments
B. Radioactive substances
c. Toxic heavy metals
D. organic wastes		11
193Which of the following is not a cause of pollution?
A. Afforestation
B. Wars among nations
c. Industrialization
D. Growth of algae in water		11
194Q. 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
195is the contamination of water
by substances harmful to life.
A. Water pollution
B. Air pollution
c. Noise pollution
D. None of the above		11
196Arid 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
197Q3. Give three examples in which green chemistry has been applied.11
198The primary pollutant that leads to photochemical smog is :
A. sulphur dioxide
B. acrolein
c. ozone
D. nitrogen oxides		11
199Global warming is caused due to_ concentration of Co,
in air
(a) Decreased
(b) increased
(c) Both (a) & (b) (d) None of these		11
200Prepare slogans on greenhouse effect to
announce in your school assembly.		11
201B.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
202Distinguish between Water pollution and land pollution.11
203Pollutant which causes acid rain is
( A cdot S O_{2} )
в. ( C O_{2} )
( c cdot c o )
D. Hydrocarbons		11
204Q.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
205Q21. What should be the tolerable limit of F-ions in drinking water?11
206Biological 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
207Instead 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
20809. What are the reactions involved for ozone layer depletion in the stratosphere?11
209Which 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
210190. 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
211The 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
2123.
Which of the following gases cause acid rain ?
(a) Ammonia
(b) Hydrogen
(c) Oxides of Nitrogen (d) Sulphur dioxide		11
213Which 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
214Which 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
215What are pesticides and herbicides? Explain with examples.11
216199. 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
21747. Environmental pollution can be
controlled by:
(1) Checking atomic blasts
(2) Manufacturing electric vehi-
cles
(3) Sewage treatment
(4) All of the above		11
218The first inorganic pesticide to be used commercially was
A. Bordeaux mixture
B. Burgandy mixture
c. D.D.T.
D. 2-4 D		11
2191. 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
220To 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
221Given 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
222114. 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
223Unseasonal rains and cyclones are the
results of:
A. global warming
B. acid rain
c. increase of water pollution
D. increase of ( C O )		11
224Water 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
225Match 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
226How water gets polluted? How the
pollution can be minimised?		11
227143. 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
228If 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
229Q2. Explain the tropospheric pollution in 100 words?11
230150. 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
231Green 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
232is 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
233Carbon 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
234Eutrophication is a
A. Neutral sign for ecosystem
B. Dual-sided sign for ecosystem
C. Bad sign for ecosystem
D. Good sign for ecosystem		11
235Which 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
237can cause sea levels to rise
dramatically.
A. Global warming
B. Rock slide
c. water pollution
D. None of the above		11
238Read 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
239What is ozone depletion?11
240Classical smog is also called
as
A. London smog
B. sulphurous acid smog
c. Both ( A ) and ( B )
D. Los angles smog		11
241Bioamplification 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
242Match 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
243Most insecticides attack upon insects
on their
A. Digestive system
B. Reproductive system
c. Nervous system
D. Respiratory system		11
244Faraday 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
245Define a) Dalapon b) Metolachlor11
24626. 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
247The rain mixed with sulphuric acid is called as
A. Acid rain
B. Alkaline rain
c. Neutral rain
D. None of these		11
248Q. 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
249Which layer of the atmosphere contains
the ozone layer?
A. Stratosphere
B. Troposphere
c. Exosphere
D. Mesosphere		11
250What is the concentration above which
sulphate causes laxative effect?
( A cdot 500 ) ppm
B. 500 ppb
c. 100 ppm
D. 100 ppb		11
25122. 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
252Why does Mathura refinery pose problems to the Taj Mahal?11
253Which 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
254125. 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
255Q11. What is siltation?11
256“Sporeine” is used to control
A. Bacterial pathogen
B. Fungal pathogen
c. Nematodes
D. Insects pest		11
257Acid 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
259Biological 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
260In Greece and Italy, marble statues were damaged by:
( A cdot operatorname{smog} )
B. acid rains
c. eutrophication
D. leakage of ( C l_{2} )		11
261troposphere 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
262Which 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
263The aromatic compounds present as particulates are :
A. Polycyclic aromatic hydrocarbons
B. Benzene
c. Toluene
D. Nitrobenzene		11
264The fuel obtained by decomposing sludge is:
A. biogas
B. petrol
c. diesel
D. kerosene		11
265134. 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
266Which 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
267Addition 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
268The 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
26935. Iron and manganese are removed
in water by the process of:
(1) Chlorination
(2) Filtration
(3) Lime-soda treatment
(4) Aeration		11
270Which of the following compounds are toxic?
A. Benzene
B. Toluene
c. Carbon tetrachloride
D. All of the above		11
271The 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
272Which type of biological waste effect soil?
A. Urine
B. Feces
c. Both a and ( b )
D. None of these		11
273Q4. Which gases are responsible for greenhouse effect? List some of them.11
274Compost is being used for all of the following except:
A. landfill cover
B. landscaping
c. low grade fertilizers
D. agricultural field		11
275What 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
276Consider 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
27769. 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
278232. Carcinogenic pollutants are
(a) PCBs
(b) benzene
(c) Both (a) and (b) (d) None of these		11
27947. 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
281How 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
282Phosphate 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
283The 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
284The 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
285Chief source of soil and water pollution
is:
A. mining
B. agro industry
c. thermal power plant
D. all the three		11
286How 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
287Which 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
288Flouride 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
289Which of the following pollutants cannot be degraded by natural process?
A . DDT
B. Nuclear Waste
c. Heavy Metalss
D. All of the above		11
290The 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
291The 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
292Whenever 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
29394. 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
295Soap and detergents are the source of organic pollutants like
A. Glycerol
B. Polyphosphates
c. Sulphonated hydrocarbons
D. All of these		11
296Q20. 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
297147. 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
2985. The biggest particulate matter is
(a) HNO2 droplets (b) Fly ashodno
(c) H,SO, droplets (d) Soot		11
299Name 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
300If ( 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
301Smoke is a form of wet deposition of acid rain. True or false?
A. True
B. False		11
302Soil contains
A. Air and water
B. Water and plants
C. Minerals, organic matter, air and water
D. Water, air and plants		11
303What is Green Chemistry?11
30463. 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
305at 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
306191. Which of the following is the primary precursor of
photochemical smog?
(a) Hydrocarbon (b) Ozone
(c) PAN
(d) Water vapour		11
30751. The uppermost region of the atmosphere is
07- (a) stratosphere (b) exosphere onda
(c) troposphere (d) ionosphere		11
308Which of the following is a measurement of water pollution?
A . PSC
в. РСВ
( c . ) во
D. coo		11
309The 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
310Maximum prescribed limit of ( Z n ) in
drinking water is:
( A cdot 1 ) ppm
B. 10 ppm
c. 4 ppm
D. 5 ppm		11
311Ultraviolet radiation is absorbed by?
A. exosphere
B. ionosphere
c. ozonosphere
D. stratosphere		11
31293. 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
313140. 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
314Untreated 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
315Phytotron is
A. A controlled condition chamber for plants
B. Leaf culture process
C . Special culture of seeds
D. Root culture process		11
316How is population density calculated?11
317Give any two reasons for land
degradation.		11
318115. 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
31979. Which city is not the part of Taj Trapezium?
(a) Agra
(b) Faridabad
(c) Mathura
(d) Firozabad		11
320141. 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
321Which of the following is a sink for CO?
A. Haemoglobin
B. Microorganism presence in the soil
c. Ocean
D. Plant		11
322the second layer of the atmosphere reaches ( 48 mathrm{km} ) above the earth’s surface.11
323Q.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
324Name the two important non-metallic oxides which causes acid rain.11
325Solvents 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
326The 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
327Which soil is red in colour?
A. Multani soil
B. Shadu soil
c. Terracotta soil
D. Kaolin (china clay)		11
328Water is often treated with chlorine to:
A. cause sedimentation
B. remove insoluble impurities
c. increase oxygen content
D. kill Germs		11
329What 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
330Which of the following disease increase due to greenhouse effect?
A. Malaria
B. Dengue
c. Yellow Fever
D. All of the above		11
331Which 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
332Acid rain is caused by
A. emission of gases from industries
B. air pollutants
C. both (A) and (B)
D. none of above		11
333Q. 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
33483. 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
335Q15. What are pesticides and herbicides? Explain giving examples.11
336What are bio-hard and bio-soft
detergents? Give one-one illustration of
each.		11
337Soil pollution is the outcome of
A. deforestation
B. pesticides and herbicides
c. industrial waste
D. all of above		11
338The ‘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
339As 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
340Urea 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
341Q1. Define environmental chemistry?11
342Lung 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
343The 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
344Polythene is which type of waste?
A. Domestic
B. Industrial
c. Chemical
D. None of these		11
345State True or False.
Use of herbicides and pesticides should be reduced to prevent soil pollution.
A. True
B. False		11
346Q. 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
347A 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
348Which 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
349What 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
350The 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
351What do you mean by green chemistry?
How will it help decrease environmental pollution?		11
352156. 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
353The 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
354Assertion(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
355Which of these are particulates?
A. Dust and fumes
B. Fly ash and smoke
c. Mist and fumes
D. All of these		11
356Carbon 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
357Q. 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
35897. The region which is greatly affected by air pollution is
(a) Troposphere (b) Stratosphere
(c) Thermosphere (d) Mesosphere HD		11
359Assertion : 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
360What is the effect of soil erosion in our
country?		11
3617. 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
362Photochemical smog does not contain
A. PAN
B. Ozone
c. Nitrogen dioxide
D. ( S O_{2} )		11
363When 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
36427. Ozone layer of stratosphere required protection from
indiscriminate use of
(a) Balloons
(b) Pesticides
(c) Aerosols and high flying jets
(d) Atomic explosions		11
365List out the major air pollutants.11
366Q8. Name the acids which are responsible for acid rain?11
3676. 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
3680.25 What are the sources of dissolved oxygen in water?11
369Q5. (a) Define eutrophication and pneumoconiosis.
(b) Write difference between photochemical and classical smog.
bo		11
370Which 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
371194. 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
372Which of the following can be used for controlling Gaseous Pollutant?
A . Arrestor
B. Incineration
c. Absorption
D. None of above		11
373Afforestation and reforestation is a
measure mainly to control
A. soil pollution
B. water pollution
c. thermal pollution
D. none of above		11
374Plastics 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
375Mark 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
376129. Which of the following is the greenest solvent?
(a) Formaldehyde (b) Benzene
(c) Water
(d) Ethanol		11
377Which 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
378Q. 27 Why does water covered with excessive algae growth become polluted?11
379Which 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
3806. Ozone depletion is mainly due to
(a) HCFS (b) CFCs
(c) CHBr
(d) all of the above
7 The nelltant talased
Re
d		11
381Largest group of insecticide of plant origin are
A. Organochlorines
B. Triazines
c. Pyrethroids
D. Carbamates		11
382Which 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
383179. 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
384CIPIUL 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
385Q. 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
386Q. 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
387Global 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
388Which layer protects us from harmful ultraviolet rays of the sun?
A. First layer
B. Second layer
c. Ozone layer
D. Exosphere		11
389Look at the picture. What is this item
made of?
A. Leather
B. Glass
c. Rubber
D. Plastic		11
39017. Which forms the part of hazy fumes of photochemical
smog?
(a) SO,
(b) Aldehydes
(C) PAN formation (d) Nitrogen dioxide		11
391What is the population of these states?
(i) Sikkim
(ii) Lakshadweep		11
392The 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
39360. 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
394Waste 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
395Q. 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
396125. In India, rules of Green Chemistry are governed by
(a) IGT
(b) RGT
(c) NGT
(d) SGT		11
39729. Which of the following fuels caus-
es minimum environmental pol-
lution ?
(1) Kerosene (2) Diesel
(3) Coal (4) Hydrogen		11
398e. 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
399Which 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
400Q. 20 Dissolved oxygen in water is very important for aquatic life. What
processes are responsible for the reduction of dissolved oxygen in water?		11
401Q. 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
402Which type of rain can cause soil pollution?
A. Acid rain
B. Tropical rain
c. Temperate rain
D. All of these		11
40345. Of the following, which
pollutes the air of a big ci
(1) Copper
(2) Chromium
(3) Lead
(4) Cadmium		11
404Region/regions of the atmosphere where temperature decreases with
altitude is/are:
A. thermosphere
B. stratosphere
c. troposphere
D. ozonosphere		11
405Green house effect is caused by :
A ( . N O_{2} )
в. ( C O )
c. ( N O )
D. ( C O_{2} )		11
406Acid rain is due to pollution of
A. Dust
B. Pesticides
c. ( S O_{2} ) and ( N O_{2} )
D. Carbon particle		11
407220. 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
408A little amount of fertilizer makes your
lawn grow better but a larger amount of the same kills grasses.Why?		11
409Agriculture 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
410A Crane had DDT level of 5 ppm in its
body. What would happen to the population of such birds?		11
411Which of the following is determined by the oxidation of acidified potassium dichromate?
A. DO
B. BOD
( c cdot cos )
D. TLV		11
412Depletion of ozone layer causes:
A. blood cancer
B. Iung cancer
c. skin cancer
D. breast cancer		11
413Spraying of DDT produces pollution of
A. Air
B. Air and water
c. Air and soil
D. Air, water and soil		11
414During a thunderstorm, rainwater contains nitric acid. Explain with
reaction.		11
415154. Which of the following is not involved in the formation
of photochemical smog?
(a) Hydrocarbon (b) NO
(c) SO
(d) 0,		11
416Water can drain easily though
A. clayey soil
B. loamy soil
c. sandy soil
D. bricks		11
417142. 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
418Greenhouse 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
41958. 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
42059. Which of the following is a primary pollutant?
(a) PAN
(b) CO
(c) Aldehydes		11
421Air is a mixture. Prove this statement.11
422Soil 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
4240. 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
425Pesticides 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
426The soil layer is made up of :
A. R Horizon
B. A Horizon
c. B Horizon
D. C Horizon		11
427The gas responsible for causing Bhopal
tragedy was:
A. methyl isocyanate
B. potassium isothiocyanate
c. sodium isothiocyante
D. ethyl isothiocyante		11
428Which 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
429Pollution 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
430Q5. Which zone is known as ozonosphere?11
431Select 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
432Choose 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
433Match the Column I and Column II and
pick the correct matching from the codes given below.		11
43464. 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
435How 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
436Q. 32 Ozone is a gas heavier than air. Why does ozone layer not settle down
near the earth?		11
437Which of the following activity causes water depletion?
A. Increasing population
B. Increasing industries
c. Agricultural activities
D. All of the above		11
438Study 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
439216. 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
440The 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
44198. Classical smog occurs in places of:
(a) excess CO2 (b) cool and humid
(c) warm, dry and sunny(d) excess NH,		11
442Cutting of trees decreases:
A. pollution level
B. temperature
C. fertility of soil
D. carbon dioxide level		11
4434. 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
444Which of the following water pollutants encourage the formation of algae?
A . Insecticides
B. Heavy metals
c. Plant nutrients
D. Sediments		11
445The 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
446Maximum 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
447105. Which disinfectant cannot be used in drinking water?
(a) Potassium permanganate
(b) Bleaching powder
(c) Chlorine
(d) Phenol		11
448Q. 24 What are biodegradable and non-biodegradable pollutants?11
449Use of pesticides decreases water
pollution
A. True
B. False		11
450is an environment-friendly product and better than halons which
are used to extinguish fire.
A. Ibuprofen
B. Pyrocool
c. Carcinogen
D. Carbon-dioxide		11
4512. 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
452Water treatment plants should be installed in all
A. desert
B. residential
c. industrial
D. none of the above		11
453Fungi and bacteria grow mostly in
A. subsoil
B. Top soil
c. Bedrock
D. All of the above		11
454The 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
455Permanent hardness of water may be
removed by the addition of:
A. sodium carbonate
B. alum
c. potassium permanganate
D. lime		11
456What 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
457Q. 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
458Which of the following is a measurement of water pollution?
A . PSC
в. РСВ
( c . ) во
D. coo		11
459Q. 15 The acids present in acid rain are ………
(a) Peroxyacetylnitrate
(b) H.CO
(c) NHO
(d) H2SO4		11
46037. 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
461soil holds highest water capacity
A. sandy
B. Clayey
c. Loamy
D. Both A and C		11
462The 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
463233. 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
464Sketch the cross section of soil and
label the various layers.		11
465What 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
466The region in atmosphere containing water vapour is:
A. thermosphere
B. stratosphere
c. troposphere
D. mesosphere		11
467Q9. What is BOD?11
468Which 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
469Green 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
470Formation of ozone hole is maximum
over
A. India
B. Australia
c. Antarctica
D. Europe		11
471Which of the following is major sink for carbon monoxide?
A. water
B. Soil
c. Animal respiration
D. Salts dissolved in ocean water		11
472What causes the global warming?
A. Burning of fossil fuels
B. Deforestation
c. Industrialization
D. All of the above		11
473Q14. Do you observe any soil pollution in your neighbourhood? What efforts will you make for
controlling the soil pollution?		11
474Soil 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
475Write the future products of Green
chemistry.		11
476Q. 31 How is ozone produced in stratosphere?11
477Which 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
478195. In stratosphere CFCs get broken down by the action of
powerful UV radiation releasing:
(a) CH
(c) Ċi
(b) CIO
(d) CFCI,		11
479185. 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
480How much ( % ) of the atmosphere’s mass is contained in the troposphere?
A . 20
B. 80
( c .50 )
D. 60		11
481To 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
48229. 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
483Cochineal insects have proved very useful for the control of
A . Eicchornia
B. cactus
c. weeds
D. Parathenium		11
484Which is more hazardous to human
health?
A. Pyrethrum
B. DDT
c. Rotenone
D. Humulin		11
485In which year the first ozone hole was
discovered?
A . 1980
в. 1983
( c cdot 1985 )
D. 1990		11
486The gases associated with the green
house effect is:
A. ( C O_{2} )
в. ( O_{2} )
c. methene
D. ( C O )		11
487What 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
488reduces 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
489Which one of the following is the main cause of land degradation in Punjab?
A. Intensive cultivation
B. Deforestation
c. over irrigation
D. Overgrazing		11
490Which 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
491123. 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
492The 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
494Carbon dioxide and methane are the
two major components of greenhouse.
A. True
B. False		11
495Which 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
496Maximum 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
497Q14. 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
499Tropical cyclones that originate in the Chine sea are?
A. Hurricanes
B. Typhoons
c. Tornadoes
D. Cyclones		11
500Component of smog is
( A cdot O_{3} )
B. PAN
c. PPN and PBN
D. Both A and B		11
501What do you mean by the following:
i. Sewage
ii. Eutrophication
iii. Recycling		11
502Q7. What is the nature of classical smog?11
503Q. 10. What do you mean by viable and non-viable particulates?11
504Which 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
505What 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
506132. 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
507Carbon dioxide is the major component
of greenhouse gases.
A. True
B. False		11
508State True or False.
Deforestation increases the chances of
natural calamities
A. True
B. False		11
509Greenhouse effect is a major cause of:
A . global warming
B. reduction of temperature
c. acid rain
D. all of above		11
510Assertion
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
511Which 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
512Which 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
513Earth’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
514219. 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
515The BOD value of municipal sewage is:
A. ( 1-5 ) ppm
B. 5-10 ppm
c. ( 50-100 ) ppm
D. 100-4000 ppm		11
516The 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
517Brown 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
518205. 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
519138. 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
520If all the vegetation in the pond died,
what effects would it have on the
animals? Why?		11
521Which is responsible for ozone
depletion?
A . ( C F C s )
B. Hydrocarbons
( c cdot C O_{2} )
D. ( C O )		11
522Distinguish between the following. Water pollution – Land pollution.11
523Which oxides cause acid rains?
A. Sulphur dioxide
B. Nitrogen oxide
C. Carbon dioxide
D. Both A and B		11
524Which of the following crop is not grown in clayey soil?
A. Wheat
B. Gram
c. Paddy
D. cotton		11
525Q13. List out the gases which are considered as major source of air pollution.11
526Q8. What are the harmful effects of photochemical smog and how can they be controlled?
111		11
527Photochemical smog is related to the pollution of
A. Soil
B. water
c. Noise
D. Air		11
528Q10. What do you mean by ozone hole? What are its consequences?
Las in the blar		11
529What do you mean by Biochemical Oxygen Demand (BOD)?11
530Which of the following layer has more minerals?
A. A-Horizon
B. B-Horizon
c. C-Horizon
D. Both A and C		11
531209. 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
532Pollution is mainly caused by:
A. increase in population and decrease in natural
resources
B. industrialisation
C. urbanization and deforestation
D. all the above		11
533Which 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
5345. The gas which reacts with haemoglobin in blood is
(@) CO
(b) SO2
(c) CO₂
(d) NO2
11		11
535188. 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
5368. Which of the following will increase the BOD of water supply?
(a) Oz
(b) C H OH (c) HO
(d) CO2		11
537Long term usage of insecticides results
in
A. Sensitivity in insects
B. Kills insects
c. Resistance in insect
D. Decrease in insect population		11
538215. 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
539Green house gas among the following is/are:
A. carbon dioxide
B. nitrogen oxides
c. methane
D. all of the above		11
540Which 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
541affect the soil profile and bring changes in soil structure.
A. Vegetation
B. Animals
c. climatic factors
D. Fertilizers		11
542Ozone-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
54343. 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
544hy
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
545The water temperature should
preferably be less than ( _{–} ) degree
Celsius.
A . 10
B. 25
c. 15
D. 30		11
546Ozone 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
547Among 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
549Which 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
55044. 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
551According 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
55214. 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
55395. Most hazardous metal pollutant of automobile exhauste
is:
(a) mercury
(b) cadmium
(c) lead
(d) copper		11
554127. 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
555Q. 17 Green house effect leads to global warming. Which substances are
responsible for green house effect?		11
556Which 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
557Ammonium 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
55857. 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
559Which of the following is not a green house gas?
A. Carbon dioxide
B. Water vapour
c. oxygen
D. Methane		11
560Q. 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
561What is meant by soil erosion?11
562Which of the following is not a major greenhouse gas?
A. Carbon dioxide
B. Methane
c. calcium carbonate
D. water vapour		11
563Pathogens 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
564The acid rain destroys vegetation because it contains
A. Nitrates
B. ( mathrm{H}_{2} mathrm{SO}_{4} )
( c cdot 0_{3} )
D. co		11
565Q. 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
566Which of the following are causes of industrial pollution?
A. Asbestos
B. Oils
c. Nitrates & Phosphates
D. All of above		11
567Assertion
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
568Disease 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
569Acid rain is caused by
A. industries
B. power plants
c. automobiles
D. all of above		11
570Those 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
57189. 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
572Which soil horizon contains humus?
A. A-Horizon
B. B-Horizon
c. C-horizon
D. Bedrock		11
573222. 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
57448. Coating of solid waste with imper-
vious material is known as
(1) Encapsulation
(2) Chemical fixation
(3) Landfill
(4) Capping		11
575The 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
576Which 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
577Green 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
57833. 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
579170. 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
58016. What do you mean by green chemistry? How will it help in decreasing environmental pollution?
die about utilising the existing knowledad		11
581What is one environmental problem
associated with the use of detergents?
A. Global warming
B. Eutrophication
c. Errosion
D. Photochemical smog		11
582133. 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
583Q3. Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?11
584What do you mean by ozone hole? What
are its consequences?		11
585Q17. What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere?
Discuss.
hic absorbed by the green
1		11
586Give uses of ethanol as fuel. How it
conserves fossil fuel.		11
587Which 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
588The 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
589Water 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
590Identify 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
591Use 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
5921. 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
593What is the optimum concentration of flouride required by body?
A. 2 ppm
B. 5 ppm
c. 10 ppm
D. 1 ppm		11
594Negative 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
595Suggest four measures to check water pollution.11
596BOD refers to the
A. Bidding of Dermatology
B. Binding of Dirt
C. Biochemical occupied Date
D. Biochemical Oxygen demand		11
597The maximum limit of nitrate in
drinking water is:
A. 50 ppm
B. 40 ppm
( c .10 mathrm{ppm} )
D. 100 ppm		11
598Acid 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
5992011 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
600Ozone hole is maximum over:
A . europe
B. antarctica
( c . ) india
D. africa		11
601Photochemical 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
602Switching 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
603Which 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
604Q3. What is photochemical smog? What are its effects? How can it be controlled?11
605This 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
606Green 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
607128. 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
608Which 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 statement11
610Which 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
611Q12. Have you ever observed any water pollution in your area? What measures would you suggest
to control it?		11
61228. 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
613Which of the following is not present in
Water?
A. Antimony
B. Arsenic
c. Benzene
D. Bismuth		11
614What are the advantages of chlorofluorocarbons?
A. Excellent refrigerants
B. Very good propellants
c. Useful in firefighting
D. All of the above		11
615The 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
616Industrial waste include:
A. chemical solvents, paints
B. sandpaper, paper products
C. industrial by-products, radioactive waste
D. all the above		11
617Which 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
61877. 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
619Which of the following products have green chemistry approach?
A. Ibuprofen
B. Surfactant
c. Propene
D. All of the above		11
620Sewage 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
621Rich 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
622Which of the following is not a water pollutant?
A. Metal nitrates
B. Sewage
c. oxygen
D. Human excreta		11
623Which one of these is a herbicide?
A . DDT
в. ВНС
c. Dioxin
D. Dieldrin		11
624One of the soil pollutants is
A. radioactive substances
B. pesticides
C. herbicides
D. all of above		11
625163. 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
626121. Iron and manganese present in water are removed by
(a) chlorination (b) aeration
(c) filtration
(d) lime soda treatment		11
627Very Short Type Question How is ozone important for us?11
628Q. 48 Explain how does green house effect cause global warming?
Ans Visible light from		11
629One 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
630The 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
631Which liquid is found on the feather of birds and animal fur?11
632104. 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
633The major air pollutant is:
A. ( C O )
B. oxides of nitrogen
( c . ) soot
D. oxides of sulphur		11
634The 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
635Biomass 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
636What is the cause of Green house
effect?
A. Infrared rays
B. Ultraviolet rays
c. x-rays
D. Radio waves		11
637Green 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
638Corrosion of statues and monuments
occurs due to
A. Photochemical smog
B. Carbon monoxide
c. Acid rain
D. Methane		11
639Among 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
6404. 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
641Q18. Give the examples of insecticides.11
642Q. 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
643Assertion(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
644Which of the following layer of the soil contains more humus?
A. Top soil
B. Subsoil
c. Bedrock
D. None of the above		11
645Which 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
646The 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
647Discharge of industrial waste into the
soil causes
A. soil pollution
B. air pollution
c. water pollution
D. all of above		11
648Q.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
649110. DDT is represented chemically as
Н СІ
(a) C12
(_C1
AĆI
09
(6) rica
(c) C1-
C1
СІ СІ
(d) None of these		11
650Which 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
651The current synthesis of poly-carbonate is an application of:
A. green revolution
B. green chemistry
C. waste management
D. none of above		11
6523. The aromatic compounds present as particulates are
(a) Benzene
(b) Toluene
(c) Nitrobenzene
(d) Polycyclic aromatic hydrocarbons		11
653Ozone 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
654Over 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
655Methods used for the management of waste is/are:
A. recycling
B. incineration
c. digesting
D. all of the above		11
656Argon is a greenhouse gas.
A. True
B. False		11
657In the soil profile, which layer is harder and more compact?
A. Bedrock
B. Subsoil
c. Surface soil
D. Parent rock		11
658Among 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
660The 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
661Most harmful pesticide is
( A cdot 2,4-D )
в. ( 2,4,5- ) –
c. DDT
D. PAN		11
662The 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
663The full form of LDPE is low-density polyester, which is monomer of first grade unit.
A. ester
B. alcohol
c. ether
D. phenol		11
664We 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
665Which 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
666Q. 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
667It 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
668What would have happened if the green house gases were totally missing in the earth’s atmosphere? Discuss.11
669Which of the following is a pollutant?
A. Sooty particle
B. Sulpur-dioxide
c. carbon-monoxide
D. All of above		11
670Q. 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
671Which 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
672Which of the following is an example of photochemical smog?
A. Ketones
B. Aldehydes
c. Ester
D. None of the above		11
673Among the following industrial waste can be managed by :
A. recycling
B. burning of combustible waste material
c. dumping
D. all of the above		11
674Photochemical 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
675Which 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		11
676Which 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} )		11
677Which of the following represents type(s) of environmental pollution
A. Air pollution
B. water pollution
c. soil pollution
D. All of the above		11

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