Environmental Chemistry

Environmental Chemistry

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1Chief air pollutant which is likely to deplete ozone layer( )Nitrogen oxides and chlorofluorocarbons

( )Carbon dioxide

( )Carbon monoxide

( )Sulphur dioxide

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2Minamata disease is due to pollution of( )Organic waste into drinking water

( )Oil spill in water

( )Industrial waste containing mercury into fishing water

( )Arsenic into atmosphere

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3Cyclone collector is used for minimizing( )Noise polltion

( )Water pollution

( )Air pollution

( )Radioactive pollution

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4Sulphur dioxide affects( )Cell wall

( )All membrane systems

( )Nucleus

( )Plasmodesmata

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5Pollution of automobile exhaust that affects nervous system/produces mental diseases is( )Lead

( )Mercury

( )Nitrogen dioxide

( )Sulphur dioxide

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6Carbon monoxide is pollutant as it( )Inhibits glycolysis

( )Combines with oxygen

( )Combines with hemoglobin

( )Inactivates nerves

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7Spraying of DDT produces pollution of( )Air and soil

( )Air and water

( )Air

( )Air, water and soil

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8Atmospheric pollutant is( )CO2

( )O2

( )N2

( )CO

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9Burning of fossil fuels is the main source of pollution( )Nitrogen oxide

( )Nitric oxide

( )Nitrous oxide

( )Sulphuric dioxide

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10Increased asthmatic attacks in certain seasons are related to( )Eating of seasonal vegetables

( )Inhalation of seasonal pollen

( )Wet and dry environment

( )Low temperature

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11Ozone depletion in atmosphere shall result in( )Forest fires

( )Increased incidence of skin cancer

( )Global warming

( )None of the above

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12Which one of the following dissolves more rapidly in bllood hemoglobin than oxygen( )Ozone

( )Sulphur dioxide

( )Nitrous oxide

( )Carbon monoxide

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13Which of the following forms a toxic substance in blood by combining with hemoglobin( )Oxygen

( )Methane

( )Carbon monoxide

( )Carbon dioxide

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14Ultravoilet radiation from sun causes a reaction that produces( )Sulphur dioxide

( )Fluorides

( )Carbon monoxide

( )Ozone

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15Shahi Qilla may be destroyed by( )Temperature mediated spoilage of marble

( )All the above

( )Air pollutants from Lahore chemical industries

( )Flood in Ravi

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16Classical smog occurs in places of( )Excess SO2

( )High temperature

( )Excess NH3

( )Low temperature

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17Acid rain is due to increase in atmospheric concentration of( )Ozone and dust

( )SO2 and NO2

( )SO3 and CO

( )CO2 and CO

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18Chief source of water and soil pollution is( )Mining

( )Thremal power plant

( )Agro-industry

( )All the above

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19Which causes water pollution( )Aeroplanes

( )2,4-D and pesticides

( )Automobile exhausts

( )Smoke/fly ash

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20Air pollution is not caused by( )Hyroelectric power

( )Industries

( )Pollen grains

( )Automobiles

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21Carbon monoxide is harmful to human beings as it( )Is antagonistic to CO2

( )Is carcinogenic

( )Is destructive to O3

( )Has higher affinity for hemoglobin as compared to oxygen

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22Drawback DDT as pesticide is( )It is less effective than others

( )It becomes ineffective after some time

( )It is not easily/rapidly degraded in nature

( )Its high cost

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23Drained sewage has B.O.D( )More than that of water

( )Less than that of water

( )Equal to that of water


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24B.O.D is connected with( )Organic matter

( )Microbes

( )Microbes and organic matter


Single Answer

25Which one is most toxic( )Carbon

( )SO2

( )CO

( )CO2

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26BOD is( )Biological oxygen deficit

( )Biosphere oxygen demand

( )Biological oxygen demand


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27Soil salinity can be measured by( )Porometer

( )Calorimeter

( )Potometer

( )Conductivity meter

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28Biodegradable pollutant is( )Mercury

( )Sewage

( )Plastic

( )Asbestose

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29Water pollution is mainly due to( )Indutrial discharges

( )Sulphur dioxide

( )Oxygen

( )Carbon dioxide

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30Eutriphication causes reduction in( )Dissolved hydrogen

( )Dissolved oxygen

( )Dissolved salts

( )All the above

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31Chlorofluorocarbons release a chemical harmful to ozone( )Fluorine

( )Nitrogen peroxide

( )Sulphur dioxide

( )Chlorine

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32Ozone hole is maximum over( )Antarctica

( )Europe

( )Africa

( )Asia

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33Phosphate pollution is caused by( )Phosphate rock and sewage

( )Agricultural fertilizers

( )Weathering of phosphate rocks

( )Sewage and argricultural fertilizers

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34Sewage water is purified by( )Fishes

( )Light

( )Microorganisms

( )Aquatic plants

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35Ozone hole refers to( )Reduction in thickness of ozone layer in stratosphere

( )Increase concentration of ozone

( )Hole in ozone layer

( )Reduction of thickness of ozone in troposphere

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36Most hazardous metal pollutant of automobile exhaust is( )Cadmium

( )Lead

( )Mercury

( )Copper

Single Answer

37Depletion of ozone layer is due to( )Oxides of nitrogen

( )Oxides of carbon

( )Oxides of sulphur


Single Answer

38Ozone layer of atmosphere requires protection from indiscriminate use of( )Fungicides, insecticides, bactericides and medicines

( )Aerosols and high flying jets

( )Atomic explosions and industrial wastes

( )Balloons and turbo-prop aeroplanes

Single Answer

39Mottling of teeth is due to presence of an element in drinking water( )Mercury

( )Fluorine

( )Chlorine

( )Boron

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40Photochemical smog is caused by( )CO

( )CO2

( )NO2

( )O3

Single Answer

41Result of ozone hole is( )UV rays reach the earth

( )Green house effect

( )Global warming

( )Acid rain

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42When rain is accompanied by a thunderstorm, the collected rain water will have a pH value( )Slightly higher than that when the thunderstorm is not there

( )Uninfluenced by occurence of thunderstorm

( )Slightly lower than that of rain water without thunderstorm

( )Which depends on the amount of dust in air

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43Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere( )Fullerenes

( )Polyhalogens

( )Freons

( )Ferrocene

Single Answer

44Pick up the correct statement( )Classical smog has an oxidizing character while the photochemical smog is reducing in character

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

( )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 autombiles plays a major role in photochemical smog

Single Answer

45In Antarctica ozone depletion is due to the formation of following compound( )Chlorine nitrate

( )Peroxy acetyl nitrate

( )Acrolein

( )SO2 and SO3

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46The culturable land in the world is about( )4 billion acres

( )10 billion acres

( )8 billion acres

( )6 billion acres

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47Trophosphere extends upto( )30 km

( )20 km

( )11 km

( )40 km

Single Answer

48Temperature of trophosphere ranges from( )0-50 degree Celsius

( )10-40 degree Celsius



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49Mesosphere extande upto( )90 km

( )100 km

( )50 km

( )50-85 km

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50O2^+, NO+ are found in( )Thermosphere

( )Mesosphere

( )Trophosphere

( )Stratosphere

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51Ozone layer is present in( )Stratosphere

( )Mesosphere

( )Trophosphere

( )Thermosphere

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52Aerosol refers to( )Mixture of liquids

( )Mixture of gases

( )Dispersion of liquid or solid particles in gaseous media

( )None of these

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53Which of the following is not a fossil fuel( )H2

( )Petroleum

( )Coal

( )Natural gas

Single Answer

54The size of smoke particles is less than( )1 cm

( )10 micro-m

( )10 cm

( )1 micro-m

Single Answer

55Which one of the following destroys ozone layer( )Freon-12

( )Teflon

( )Oxides of nitrogen

( )All the above

Single Answer

56The important constituent of photochemical smog is( )Ozone

( )PAN (Peroxycetyl nitrate)

( )H2O2

( )All the above

Single Answer

57Green house effect means( )Rise of temperature in green houses

( )Global warming

( )Melting of glaciers poles

( )None of these

Single Answer

58A single chloride free radicle can destroy( )One molecule of ozone

( )100 molecules of ozone

( )10^5 molecules of ozone

( )1000 molecules of ozone

Single Answer

59Compounds which are calcinogenic at very low concentration( )Cyclic hydrocarbons

( )Alcohols

( )Polycyclic atomatic hydrocarbons

( )Aliphatic hydrocarbons

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60Which parameter is used for checking the quality of water( )BOD

( )COD

( )TOC

( )All of the above

Single Answer

61Peroxycetyl nitrate (PAN) is an irritant to human beings and it affects( )Eyes

( )Ears

( )Stomach

( )Nose

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62The main pollutant of leather tanneries in the waste water is due to the salt of( )Chromium

( )Barium

( )Potassium

( )Lead

Single Answer

63In purification of water the coagulant used is( )BaSO4

( )CuSO4

( )NiSO4

( )Alum

Single Answer

64To avoid the formation of toxic compounds with chlorine, which substance is used in addition to chlorine for water disinfecting( )Alum

( )KMnO4

( )Chloramines

( )O3

Single Answer

65Taj Mahal, a monument in Agra is suffering from( )High temperature effects

( )Cracks due to earth quakes

( )Stone cancer

( )Sea damages

Single Answer

66Inceneration means( )Precipitation

( )Cooling and washing

( )Burning of solid wastes at high temperature

( )None of these

Single Answer

67Which of the followings does not cause green house effect( )CH4

( )CO2

( )Water

( )None of these

Single Answer

68Which one of the following is non-biodegradable( )Paper

( )Fruit juices

( )Plastic

( )Wood

Single Answer

69Heavy metals mainly enter into the body through( )Lungs

( )Hair

( )Skin

( )All the above

Single Answer

70By drinking chlorinated water the risk of ___________increases.( )Liver diseases

( )Heart diseases

( )Lung diseases

( )Bladder and rectal cancer

Single Answer

71Major cause of SO2 on global scale is( )Volcanoes

( )Electric spark

( )Conbustion

( )None of these

Single Answer

72Which one of the following can be used for disinfecting water( )KMnO4

( )Cl2

( )Onoze

( )All of the above

Single Answer

73Which one of the following is not a component of environment( )Hydrosphere

( )Biosphere

( )Stratosphere

( )Lithosphere

Single Answer

74The % of CO2 in the atmosphere is( )0.03

( )0.3

( )0.5

( )3.0

Single Answer

75The 95.5% mass of Lithosphere is made of 11 elements i.e. O2, Si, Al, Fe, Ca. Na, K, Mg, Ti, H2 and P. Which element is present in trace amount( )Iodine

( )Broine

( )Lead

( )Carbon

Single Answer

76Which of the following is not an environmental pollutant( )NO2

( )CO

( )CO2

( )NO

Single Answer

77Which factor is helping to reduce the environmental pollution( )Increase in plantation

( )Industrialization

( )Rapid growth of population

( )Urbanization

Single Answer

78Which is not the effect of polluted air on environment( )Ozone

( )Global warming

( )Smog

( )Acid rain

Single Answer

79CFCs destroy ozone layer. How many ozone molecules a chlorine free radical can destroy( )20,000

( )10,000

( )50,000

( )100,000

Single Answer

80Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water( )Rain

( )Live stock waste

( )Disposal of industrial effluents

( )Oil leaks and spills

Single Answer

81One of the factor used for measuring the quality of water is dissolved oxygen (DO). The minimum value of DO required for water to be pure is( )Ppm

( )4 ppm

( )2 ppm

( )1 ppm

Single Answer

82Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen within a period of( )6 days

( )5 days

( )7 days

( )2 days

Single Answer

83Value of chemical oxygen demand (COD) is a measure of chemically ozidizable matter in water. Which value of COD will indicate more polluted water( )Low value

( )Higher value

( )Both values

( )None of these

Single Answer

84Potable water is considered to be( )Not safe for human consumption

( )The surface water

( )The ground water

( )Safe for human consumption

Single Answer

85Which step is unnecessary for purification of water for drinking purposes( )Treatment with chlorine

( )Coagulation

( )Treatment with iodine

( )Aeration

Single Answer

86The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title( )Waste management

( )Solid management

( )Semisolid management

( )Solid waste management

Single Answer

87Solid waste of the city is disposed off by dumping in a landfill. Which of the following gas is produced in the landfill( )Hydrogen sulphide

( )Oxygen

( )Chlorine

( )Hydrochloric acid gas

Single Answer

88Which of the following waste material is not recycled for use again( )Paper

( )Glass

( )Plastic

( )Hides of animals

Single Answer

89The pH range of the acid rain is( )7-6.5

( )8-7

( )Less than 5

( )6.5-6

Single Answer

90To avoid the formation of toxic compounds with chlorine which substance is used for disinfecting water( )O3

( )Chloramines

( )KMnO4

( )Alums

Single Answer

91In purification of potable water the coagulant used is( )Copper sulphate

( )Barium sulphate

( )Alum

( )Nickel sulphate

Single Answer

92The temperature in the incineration of industrial and hazardous waste process has a range( )250 to 500 degree Celsius

( )900 to 1000 degree Celsius



Single Answer

93Newspaper can be recycled again and agin by how many times( )4

( )3

( )2

( )5

Single Answer

94The film forming component of paints are( )Thinners

( )Pigments

( )Resins

( )Driers

Single Answer

95In the atmosphere, O2 is abput( )25%

( )21%

( )15%

( )10%

Single Answer

96The amount of oxygen in the lithosphere is about( )46.60%

( )35.50%

( )40.60%

( )50.50%

Single Answer

97The normal amount of overhead ozone is about( )300 DU

( )400 DU

( )250 DU

( )350 DU

Single Answer

98In water the most important oxidizing agent is dissolved molecule oxygen which ranges from( )2-4 ppm

( )4-6 pm

( )4-8 ppm

( )2-5 ppm

Single Answer

99The largest item which is recycled is( )Oil

( )Newspaper

( )Aluminium

( )Plastic

Single Answer

Environmental Chemistry

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