Question # 1

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

Automobiles

Chloroflurocarbon releases a chemical harmful to ozone

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Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

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Uninfluenced by occurrence of thuderstorm

Which depends on the amount of dust in air

Slightly lower than that of rain water without thunderstorm

Slighlty higher than that when the thunderstom is not there

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

Hydrocarbans, SO₂, CO, NH₃, nitrogen oxides and compounds of fluorine are called

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Primary pollutant

Secondary pollutant

Tertiary pollutant

None of these

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

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Live stock waste

Agricultural pesticides

Oil breaks and spills

All of the above

Minamata disease is due to pollution of

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Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

The film forming components of paints are

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Resins

Thinners

Pigments

Driers

Sulphur dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Oceans cove ______ percent of the surface of the earth

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60

70

80

97

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

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Environment

Hydrosphere

Pollutant

Biosphere

Which causes water pollution?

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Smoke/fly ash

Automobile exhausts

Aeroplnes

2,4-D and pesticides

B.O.D is connected with

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Organic matter

Microbes

Mircrobes and organic matter

None of the above

Which of the following waste material is not recycled for use again

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Paper

Plastic

Hides of animals

Glass

As it passes into food chain, the concentration of DDT

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Remains same

Decreases

Increases

Unpredictable

Which is not a method for solid waste management

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Landfill

Incinerating

Recycling

None of these

Ozone layer of stratosphere requires protection from indiscriminate use of

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Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Baloons and turbo-prop aeroplanes

Which one is the most toxic?

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Carbon

CO

CO₂

SO₂

In the atmosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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Fullerences

Freons

Polyhalogens

Ferrocene

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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SO₂

NO₂

CO

A and b only

The pH of the rain water in areas where acid rain is the cause of pollution may be

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6.5

5.6

4.5

2.2

Exposure to CO results in

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Headache

Fatigue

Unconsciousness

All of these

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

In the atmosphere, O₂is about

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10%

15%

21%

25%

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