Environmental Chemistry Online Mcqs Test

Page 1 of 9

1. Which one of the following is a water soluble vitamin?

Trypsin

Riboflavin

Niacin

Ascorbic acid

2. The elements like calcium, nitrogen and phosphorus added into the soil in large amounts are called

Trace elements

Additives

Basic elements

Nutrient elements

3. As it passes into food chain, the concentration of DDT

Unpredictable

Increases

Decreases

Remains same

4. The structure of a polymer depends upon how the monomer – repeating unit joins to make a polymer. What is not the type of structure of a polymer?

Cross linked or inter connected polymer

Linear polymer

Branched

Synthetic polymer

5. Ozone hole refers to

Hole in ozone layers

Reduction in thickness of ozone layer in stratosphere

Increase concentration of ozone

Reduction of thickness of ozone in troposphere

6. Which one is the most toxie?

CO₂

CO

Carbon

SO₂

7. What is the function of Head box in paper making machine?

It reduces the thickness of paper

Web structure is consolidated

It dry the paper

It discharge the pulp at the screen of Fourdriner table

8. Photochemical smog is caused by

CO

NO₂

CO₂

O₃

9. UV radiation bring about

Mouth cancer

Lung cancer

Skin cancer

Liver cancer

10. Air pollution is not caused by

Industries

Automobiles

Hydroelectric power

Pollen grains

11. A person is affected with carbon monoxide gas. How can we save him/her by adverse effect of the poisonous gas?

Supply pure O₂ for breathing

Drink dilute solution of NaHCO₃

All are correct

Drink dilute solution of CH₃COOH

12. Acid rain is due to increase in atmospheric concentration of

Ozone and dust

SO₃ and CO

CO₂ and CO

SO₂ and NO₂

13. Septic tank is:

An anaerobic attached growth biological treatment system

An aerobic suspended growth biological treatment system

An anaerobic suspended growth treatment system

An aerobic attached growth treatment system

14. In human liver, which substance cause cancer

Chloroform

Methane

H₂SO₃

Caron dioxide

15. Oceans, rivers, streams, lakes, polar ice caps, glaciers and group water reservoirs are included in

Atmosphere

Biosphere

Hydrosphere

Lithosphere

16. On hydrolysis sucrose gives

Fructose and maltose

Glucose and fructose

Fructose and lactose

Glucose and maltose

17. Which statement is incorrect about starch and cellulose?

Cellulose is greater in amount on earth as compared to starch

Both are polysaccharides

Both are formed by same type of monomers

Both can be found in living things

18. BOD is

Biological oxygen deficit

Biological oxygen demand

None of these

Biosphere oxygen demand

19. A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

Fiber

Polyester fiber

Varnish

Plastic

20. The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from

4ppm – 8ppm

2ppm – 3ppm

2ppm – 6ppm

2ppm – 4ppm

21. Classical smog occurs in places of

Excess NH₃

Excess SO₂

Low temperature

High temperature

22. ___________ are those resources which once used on exhausted cannot be reused.

None

Renewable

Non-renewable

Both

23. Which of the following fibers are made of polyamides?

Dacron

Rayon

Orlon

Nylon

24. Domestic waste mostly constitutes

Effluents

Biodegradable pollution

Air pollution

Non-biodegradable pollution

25. Potable water is considered to be

The Surface water

Now safe or human consumption

Safe for human consumption

The ground water

Page 2 of 9

26. Which factor is helping to reduce the environmental pollution?

Urbanization

Industrialization

Increase of plantation

Rapid growth of population

27. Water is often treated with chlorine to

Increase oxygen content

Remove hardness

Remove suspended particles

Kill germs

28. B.O.D. is connected with

Microbes

None of these

Organic matter

Microbes and organic matter

29. In big/metropolitan cities, atmosphere is mostly polluted due to

Radioactive fall out

Household waste

Pesticide residue

Automobile exhausts

30. Result of ozone hole is

Global warming

Acid rain

Greenhouse effect

UV rays reach the earth

31. Which of the following has magnesium?

Vitamin B₁₂

Carbonic anhydrase

Chlorophyll

Haemocyanin

32. Farmers and gardeners often treat soil with urea because it will

Increases oxygen contents of soil

Acts pesticide

Increases sulphur contents of soil

Increases nitrogen contents of soil

33. Which of the following is used as water disinfectant to avoid the formation of toxic compounds?

Cl₂

C₃

ClO₂

Both b & c

34. Pick up the correct statement

Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours

Classical smog has an oxidizing character while the photochemical smog is reducing in character

During formation of smog the level of ozone in the atmosphere goes down

CO which is major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog

35. Polymer formation from monomers starts by

Hydrolysis of monomers

Condensation reaction between monomers

Conversion of monomer to monomer ions by protons

Coordination reaction between monomers

36. Two vitamins absorbed from intestine along with fats are

A, D

A, C

A, B

D, B

37. The yellowish colour in photochemical smog is due to the presence of

NO₂

NO

SO₂

CO₂

38. Newspapers can be recycled again and again by how many times?

2

3

4

5

39. Most of the fertilizer are in prilled form because it is

More soluble as compared to smaller crystals

Assimilated in the root hairs of plants

Less toxic

Easy to spread in the field

40. Which of the following is a major source of thermal pollution in water bodies?

Solid waste disposal sites

All of the above

Sewage treatment plant

Thermal power plant

41. The main pollutant of leather tanneries in the waste water is

Chromium IV

Chromium V

Chromium III

Chromium VI

42. Glucose contains

Four secondary alcoholic group

One – CHO group

One primary alcoholic group

All are correct

43. Keratomalacia is caused due to the deficiency of vitamin

B

A

K

D

44. A condensation polymer among the following is

Polystyrene

Dacron

Teflon

PVC

45. Which of the following is not present in nucleotide?

Tryoxine

Guanine

Cytosine

Adenine

46. What do you see as the main problem of Pakistan?

Clean drinking water

Growing population

Shortage of food

Unemployment

47. Glass is classified into different types on the basis of its

Manufacturing process

Chemical composition

All of these

Physical properties

48. What is the effect of polluted air on environment?

Ozone

Global warming

Smog

Acid rain

49. Carbon monoxide is pollutant as it

Inhibits glycolysis

Combines with hemoglobin

Combines with oxygen

Inactivates nerves

50. The main pollutant of leather tanneries in the waste water is due to the salt of:

Chromium (III)

Copper

Chromium (VI)

Lead

Page 3 of 9

51. In Antarctica ozone depletion is due to the formation of following compound

SO₂ and SO₃

Chlorine nitrate

Acrolein

Peroxy acetyl nitrate

52. The lowest layer of atmosphere is known as the

Troposphere

None of these

Ionosphere

Stratosphere

53. The percentage of suspended solid waste in raw water is removed by coagulation is

90

70

80

60

54. Which of the following is fully fluorinated polymer?

Neoprene

PVC

Thiokol

Teflon

55. Chlorofluorocarbon releases a chemical harmful to ozone

Nitrogen peroxide

Chlorine

Sulphure dioxide

Fluorine

56. Which of the following devices is suitable for the removal of gaseous pollutants?

Fabric filter

Cyclone separator

Wet scrubber

Electrostatic precipitator

57. Cracking of polyethene at high temperature gives

Allotropes

Monomers

Polymers

Isomorphs

58. Which of the following is not a marine pollutant?

Plastics

Dissolved oxygen

Oil

All of these

59. Atmosphere of big/metropolitan cities is polluted most by

Pesticide residue

Household waste

Automobile exhausts

Radio-active fall out

60. Smog is:

A natural phenomenon

Is colourless

All of these

A combination of smoke and fog

61. The pH range of the acid rain is

Less than 5.6

6.5-6

6-5.6

7-6.5

62. Some O₂ is present in water. The water will be considered as “polluted water” when concentration of O₂ in it will be

Greater than 4 ppm

Greater than 8 ppm

4 – 8 ppm

Less than 4 ppm

63. Depletion of ozone layer is due to

Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of these

64. Which sequence of steps is correct in paper making from pulp?

Flow spreader, pressing, drying, calendar stock

Calendar stock, flow spreader, pressing drying

Calendar stock, Drying, pressing, flow spreader

Flow spreader, Drying, pressing, calendar stock

65. Biochemical oxygen demand(BOD) is the capacity of organic matter is natural water to consumer oxygen with in a period of

6 days

5 days

2 day

7 days

66. Acid rains are produced by

Excess release of carbon monoxide by incomplete combustion

Excess formation of CO₂ by combustion and animal respiration

Excess production of NH₃ by industry and coal gas

Excess NO₂ and SO₂ from burning fossil fuels

67. Choose the chief air pollutant among the following which depletes ozone layer

Carbon dioxide

Chlorofluorocarbons and nitrogen oxides

Carbon monoxide

Sulphur oxide

68. Which of the following has ester linkage?

PVC

Terylene

Nylon

Bakelite

69. Violet colour is obtained when dilute CuSO₄ is added in alkaline solution of protein. This test is known as

Xanthoproteic test

All of these

Hopkins-cole

Biuret

70. Incineration of municipal waste is carried out in the temperature range of

250 to 500°C

500 to 900°C

950 to 1300°C

900 to 1000°C

71. Thermoplastic polymer can be softened and hardened when cool repeatedly. Which one is not a thermoplastic among the following?

Epoxy resin

PVC

Plastic toys

None of these

72. Among the following polymers, the strongest molecular forces are present in

Thermosetting polymers

Elastomers

Thermoplastics

Fibers

73. Glyptal polymer is obtained from glycerol on reacting with

Malonic acid

Acetic acid

Maleic acid

Phthalic acid

74. BOD/COD ratio will always be:

None of these

Equal to 1

Less than 1

More than 1

75. Excess fluoride in drinking water is likely to cause:

Change in taste and odour

Blue baby syndrome

Intestinal irritation

Fluorosis

Page 4 of 9

76. Biodegradable pollutant is

Asbestos

Mercury

Plastic

Sewage

77. The combination of smoke and fog is called

Coagulation

Smog

Primary pollutant

Secondary pollutant

78. Denaturing of protein is:

Three dimensional twisting and folding of peptide chain

Hydrolysis of protein

Developing hydrogen bonding in peptide chain

Unfolding of protein

79. Which is unnecessary for purification of water for drinking purposes?

Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

80. Ozone depletion in stratosphere shall result in

Forest fires

Global warming

Increased incidence of skin cancer

None of these

81. An example of water soluble vitamin is

Vitamin E

Vitamin D

Vitamin A

Vitamin C

82. Water pollution is mainly due to

Oxygen

Sulphure dioxide

Carbon dioxide

Industrial discharges

83. Fungicides are the pesticides which

Kill plants

Kill insects

Kill herbs

Control the growth of fungus

84. Nutrient leach is due to

Combustion of soil

Neutralization of soil

Drying of soil

Acidification of soil

85. Which one of the following compounds is not of a polymer?

Starch

Glucose

Nylon 66

Protein

86. Increasing skin cancer and high mutation rate are due to

Acid rain

CO pollution

Ozone depletion

CO₂ Pollution

87. Vegetables oils are

Essential oils obtained from plants

Glycerides of saturated fatty acids

Unsaturated fatty acids

Glycerides of unsaturated fatty acids

88. Most of the atmospheric air pollutants are present in large quantity in

Thermosphere

Trophosphere

Mesosphere

Stratosphere

89. The product of addition polymerization reaction is

PVC

Polyamide

Nylon

Terylene

90. Chief air pollutant which is likely to deplete ozone layer

Nitrogen oxides and chloro fluorocarbon

Sulphure dioxide

Carbon dioxide

91. The cause of Minamata disease in the pollution of

Oil spills in H₂O

Industrial waste Having Hg

Arsenic (As) into atmosphere

Organic waste in drinking H₂O

92. Which of the following is not an air pollutant?

NO

N₂O

N₂

CO

93. The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required?

To destroy nitrogen oxide from the atmosphere

To help plant to undergo photosynthesis

To help to clean the atmosphere

To help in fixing of bacteria

94. Ultraviolet radiation from sun causes a reaction that produces

Fluorides

Ozone

Carbon monoxide

Sulphure dioxide

95. When urea is applied to crop it quickly hydrolysis to give ammonium carbonate, which is unstable and decomposes to release the gas

NH₃

H₂

CO

N₂

96. Carbon monoxide is harmful to human beings as it

Is carcinogenic

Is destructive to O₃

Is antagonistic to CO₂

Has higher affinity for hemoglobin as compared to oxygen

97. Natural fertilizer provides potassium in the form of K₂O potash

3 kg

1.5 kg

4.5 kg

6.5 kg

98. __________ are the resources that can be replenished by physical and biological means.

Non renewable

Renewable

None

Both

99. In the upper atmosphere chlorofluorocarbons (CFCO₃, CF₂Cl₂) are broken down to give chlorine radicals but not fluorine radicals. What is the best explanation for this

Fluorine is more electronegative than chlorine

The C – F bond is stronger than C – Cl bond

The chlorine atom is larger than the fluorine atom

The C – F bond is stronger than the C – Cl bond

100. Which one of the following is not an example of chain growth polymer?

Bunna-S

Glyptal

Neoprene

PMMA

Page 5 of 9

101. Cyclone collector is used to reduce

Water pollution

Noise pollution

Radioactive pollution

Air pollution

102. Fresh sewage is ____________ in nature

Acidic

Alkaline

Neutral

Highly acidic

103. Burning of fossil is the main source of pollution

Nitric oxide

Nitrogen oxide

Sulphure dioxide

Nitrous oxide

104. The prosthetic group is glycoprotein is

Vitamin

Fat

Nucleic acid

Carbohydrate

105. Denaturation of protein means the structure of protein is disrupted indicate which factor does not denature protein

Keeping pH 7.35

Oxidizing agent

Heat protein

pH changes

106. Which of the following is a biodegradable polymer?

Cellulose

Polyvinyl chloride

Nylon-6

Polyethene

107. Proxy acetyl nitrate (PAN) is an irritant to human beings and it affects

Nose

Ears

Eyes

Stomach

108. Silk is an example of

Vegetable fiber

Mineral fiber

Animal fiber

None of these

109. Which substance is used as filler or additive in papermaking?

Starch

Cellulose

Glucose

Fructose

110. Which field produces significant amount of methane in the atmosphere?

Cotton field

Paddy field

Wheat field

Can sugar field

111. Plastics are a pollution problem because many plastics

Are made from petroleum

Decompose to produce toxic products

Are very inflammable

Burn to produce toxic fumes

112. Which one is the major reason for pollution in big cities?

Fossil fuel

None of these

Heat dispersion

Acid rain

113. Which substances do not react immediately with bromine water?

Phenol

Ethene

Benzene

Methane

114. Ozone layer of stratosphere requires protection from indiscriminate use of

Aerosols and high flying jets

Atomic explosions and industrial wastes

Fungicides, insecticides, bactericides and

Balloons and turbo-prop airplanes

115. Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due to

Combining with oxygen to form carbon dioxide

Forming stable compound with hemoglobin

Destruction of hemoglobin

Preventing reaction between oxygen and hemoglobin

116. Pollution is

Release of toxic/undesirable materials in environment

Conservation of energy

All the above

Removal of top soil

117. Colloidal material in the raw water is removed by

Combustion

Coagulation

Chlorination

Purification

118. Bakelite is obtained from phenol by reacting with

Chlorobenzene

Formaldehyde

Acetal

Acetaldehyde

119. Drained sewage has B.OD.

Less than that of water

Equal to that of water

None of these

More than that of water

120. Ozone hole is

Formation of a complex of O₃ with hydrocarbons

Increase of concentration of O₃ in tropical region

Depletion in total amount of O₃ in particular region

Decomposition of O₂ to O₃ in sunlight

121. Which one of the following is not a pollutant

CO₂

CO

SO₂

NO₂

122. The temperature in the incineration of industrial and hazardous waste process has a range

900 to 100°C

500 to 900°C

250 to 500°C

950 to 1300°C

123. Photo chemical smog contains __________ as main reactants.

Nitrons oxide and unburnt hydrocarbons

NO and burnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

N₂O and burnt hydrocarbons

124. Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause

Corrosion

Explosion

Non-biodegradable foam

Undesirable plant growth

125. The metal present in blood is

Al

Cu

Fe

Hg

Page 6 of 9

126. Which of the following is a non-point source of water pollution?

All of these

Urban and suburban lands

Sewage treatment plants

Factories

127. Which one of the following is not type of polymer?

Terpolymer

Copolymer

Heteropolymer

Homopolymer

128. Which treatment is not done with pulp before delivering it to paper making machine

Pressed to remove moisture

Addition of chemical additives

Pulp is dispersed in water and slurry is obtained

Mechanical beating of fibers

129. Phosphate pollution is caused by

Phosphate rocks and sewage

Agricultural fertilizers

Weathering of phosphate rocks only

Sewage and agricultural fertilizers

130. Mottling of teeth is due to presence of an element in drinking water

Mercury

Chlorine

Boron

Fluorine

131. Most hazardous metal pollutant of automobile exhaust is:

Copper

Lead

Mercury

Cadmium

132. Which of the following forms a toxic substance in blood by combining with hemoglobin?

Carbon monoxide

Carbon dioxide

Methane

Oxygen

133. Which one of the following macromolecules contains carbon, hydrogen, nitrogen and oxygen in it?

Bakelite

Starch

Terylene

Nylon 66

134. Which one is not a pollutant normally?

Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

135. Soil salinity can be measured by

Potometer

Conductivity meter

Calorimeter

Porometer

136. Drawback DDT as pesticide is

It becomes ineffective after some time

It is less effective than others

Its high cost

It is not easily/rapidly degraded on nature

137. Which one of the following is used as coagulant for purification potable water?

Nickel Sulphate

Barium Sulphate

Alum

Copper Sulphate

138. Which one of the following species is more dangerous and cause cancer?

Chromium (III)

Chromium (VI)

Sodium (I)

Calcium (II)

139. Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases?

Hg

Pb

SO₂

NO₂

140. Which of the following is an example of ketohexose?

Galactose

Mannose

Maltose

Fructose

141. Which of the following is a secondary air pollutant?

Carbon dioxide

Carbon monoxide

Sulphur dioxide

Ozone

142. Calendar stock is process in paper making in which

Paper is wounded in the form of reel

Paper thickness in reduced

Pulp is spread over fabric or screen

Moisture is removed

143. Which substance is not used are additive in paper making?

Starch

TiO₂

Tale

Glucose

144. A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid

Three

Two

Four

One

145. To avoid the formation of toxic compounds with chlorine which substance is sued for disinfecting water?

Chloramines

O₃

KMnO₄

Alums

146. Sulphure dioxide affects

Cell wall

Plasmodesmata

Nucleus

All membrane systems

147. Fluoride pollution mainly affects:

Brain

Teeth

Kideny

Heart

148. All fats are

Esters

Aldehydes

Carbohydrates

Hydrocarbons

149. Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called

Mesosphere

Stratosphere

Troposphere

Thermosphere

150. The molecular formula of a trisaccharide will be

C₁₈H₃₂O₁₆

C₁₈H₃₆O₁₈

C₃H₆O₃

C₃H₃O₃

Page 7 of 9

151. The raw material to form nylon is

Ethylene

Isoprene

Butadiene

Adipic acid

152. In sewage treatment, the detention period allowed for oxidation ponds ranges from ___________ weeks.

9 to 10

15 to 20

4 to 5

1 to 2

153. In the glass manufacturing process, annealing is done to prevent glass from

Melting

Becoming dirty

Harmful stress

Increased shinning

154. Chemical oxygen demand of water (COD) is measure by reacting water with

Sulphate ion (SO₄²¯)

Dichromate ion (Cr₂O₇²¯)

Chromate ion (CrO₄²¯)

Permanganate ion (MnO₄)

155. Shahi Qilla may be destroyed by

Flood in Ravi

Air pollutants from Lahore chemical industries

All of these

Temperature mediated spoilage of marble

156. Which of the following is responsible for depletion of the ozone layer un the upper strata of the atmosphere?

Polyhalogens

Ferrocene

Fullerenes

Freons

157. Which structure of protein gives the sequence of amino acids only?

Primary structure

Secondary structure

Tertiary structure

Quaternary structure

158. When rain is accompanied by a thunderstorm. The collected rain water will have a pH value

Slightly lower than that of rain water without thunderstorm

Uninfluenced by occurrence of thunderstorm

Which depends on the amount of dust in air

Slightly higher than that when the thunderstorm is not there

159. Which of the following are likely to be present in photochemical smog?

Smog

Sulphur dioxide

Photochemical oxidants

Chlorofluorocarbon

160. BOD is:

A measure of the organic matter presents in water

Usually less than COD

All of these

Biochemical oxygen demand

161. The equality of raw water is improved when it is chlorinated because

Hardness of water decreases

Dissolved oxygen increases

Cl₂ kills the pathogenic bacteria

pH of water is controlled

162. Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Sulphur oxide

Mercury

Lead

Nitrogen oxide

163. Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water?

Disposal of industrial effluents

Rain

Livestock waste

Oil leaks and spills

164. In fructose the possible optical isomers are

4

12

16

8

165. Air, water, soil etc are the examples of _________ resources.

Both

Non-renewable

None

Renewable

166. Soft drinks and baby feeding bottles are generally made up of

Polyurethane

Polyester

Polystyrene

Polyurea

167. Lithosphere has amount of silicon

27.72%

21.13%

35.30%

40.01%

168. Newspaper can be recycled again and again how many times?

5

3

2

4

169. Which causes water pollution?

Automobile exhausts

Airplanes

2, 4-D and pesticides

Smoke/fly ash

170. Choose the crop for which ammonium nitrate is nit used

Wheat

Sugar cane

Paddy rice

Cotton

171. The temperature in the incineration of industrial and hazardons water process had a range

900 to 1000°C

250 to 500°C

950 to 1300+C

500 to 900°C

172. Pick out the wrong statement.

Troposhere is a dusty zone containing water vapor and clouds.

The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone.

Mesosphere is characterized by very low atmospheric pressure and low temperature.

The radio waves used in the long distance radio communication are reflected back to earth by stratosphere.

173. Increased asthmatic attacks in certain seasons are related to

Wet and dry environment

Eating of seasonal vegetables

Low temperature

Inhalation of seasonal pollen

174. The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to _____________ percent.

8

1

12

4

175. Which of the following groups of plants can be used as indicators of SO pollution of air?

Ferns

Epiphytic lichens

Liver worts

Home worts

Page 8 of 9

176. Ozone hole is maximum over

Europe

Antarctica

Africa

Asia

177. Atmospheric pollutant is

O₂

N₂

CO₂

CO

178. Which of the following is an air pollutant?

Carbon monoxide

Carbon dioxide

Oxygen

Nitrogen

179. Choose a point which is not included in the components of environment

Hydrosphere

Biosphere

Lithosphere

Stratosphere

180. A single chlorine free radical can destroy how many ozone molecules

10

100

10000

1000

181. Swage water is purified by

Aquatic plants

Microorganisms

Fishes

Light

182. SO₂ and NO₂ cause pollution due to increase in

Basicity

Neutrality

Acidity

Buffer action

183. Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called

Aerosols

Mists

Fumes

Smoke

184. Eutrophication causes reduction in

Dissolved oxygen

All of these

Dissolved hydrogen

Dissolved salts

185. Which one of the following is not a polymer?

Teflon

Glycogen

Starch

Petroleum

186. Which substance is used to bleach the pulp?

NaCl

NaClO

NaOH

Na₂SO₃

187. Chief source of water and soil pollution is

All the above

Thermal power plant

Agro-industry

Mining

188. SO₂ and NO₂ produce pollution by increasing

Acidity

Alkalinity

Neutrality

Buffer action

189. Which process is not involved to improve the qualities of raw water?

Chlorination

Aeration

Self-oxidation reduction

Coagulation

190. Cyclone collector is used for minimizing

Noise pollution

Water pollution

Radioactive pollution

Air pollution

191. Which one of the followings is non-woody raw material used for making pulp and paper?

Eucalyptus

Popalr

Corn straw

Fur

192. Minamata disease is due to pollution of

Organic waste into drinking water

Arsenic into the atmosphere

Oil spill in water

Industrial waste containing mercury into fishing water

193. How much percentage of total water is available as fresh water?

10%

2%

1%

50%

194. Of the following a step growth polymer

Teflon

Polyethylene

Bakelite

PVC

195. Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Ozone

Sulphure dioxide

Nitrous oxide

Carbon monoxide

196. Choose the chief air pollutant among the following which depletes ozone layer

Basicity

Buffer action

Acidity

Neutrality

197. Spraying of DDT produces pollution of

Air and soil

Air

Air and water

Air, water and soil

198. Fossil fuels like coal, oil, natural gas and metals are the examples of _________ resources.

Renewable

Both

Non-renewable

None

199. Chromium (VI is used in)

Fertilizer industry

Leather tanning

Cement industry

Water purification

200. Environmental pollution affects

Biotic and abiotic components of environment

Biotic components

Plants only

Man only

Page 9 of 9

201. Thickness of the atmosphere is

100 km

1500 km

500 km

1000 km

Total Questions:	201
Time Allowed:	60 Minutes
Total Marks:	201
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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