Question # 1

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

56.60%

50.50%

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

Which causes water pollution?

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Smoke/fly ash

Automobile exhausts

Aeroplnes

2,4-D and pesticides

Carbon monoxide is harmful to human beings as it

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Is carcinogenic

Is antagonistic to CO₂

Has higher affinity for hemoglobin as compared to oxygen

Is destructive to O₃

Soil salinity can be measured by

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Calorimeter

Potometer

Porometer

Conducitvity meter

The amount of Si in the lithosphere is about

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27.72%

30.35%

35.30%

40.21%

Chloroflurocarbon releases a chemical harmful to ozone

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Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

SO₂Makes ______ acid rains

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Carbonic acid

Sulfuric

Nitric acid

All of these

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

UV radiations bring about

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Skin cancer

Mouth cancer

Lung cancer

Liver cancer

BOD is

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Biological oxygen deficit

Biosphere oxygen demand

Biological oxygen demand

None of the above

Water which his considered to be safe for human consumption is known as

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Distilled water

Contaminated water

Potable water

Rain water

Acid rains are produced by

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Excess NO₂and SO₂from burining fossil fuels

Excess production of NH₃by industry and coal gas

Excess release of carbon monoxide by incomplete combustion

Excess formation of CO₂by combustion and animal respiration

Pick up the correct statement

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

Classical smog has an oxidizing character while the phtochemical 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

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

Ozone in most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Which one of the following is not air pollutant gas

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CO

CO₂

NO

SO₂

What is the cause of water pollution

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Chemical and bacterial contents in live stock

The spilled oil in rivers and ponds

Wide spread use of pesticides

All of the above

Biodegradable pollutant is

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Plastic

Asbestos

Sewage

Mercury

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

Spraying of DDT produces pollution of

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Air

Air and water

Air and soil

Air, water and soil

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

Which one is not a pollutant normally?

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Hydrocarbons

Carbon dioxide

Carbon monoxide

Sulphur dioxide

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

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Paper

Plastic

Hides of animals

Glass

Which step is unnecessary for purification of water for drinking purposes

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Aeration

Coagulation

Treatment with chlorine

Treatment with iodine

B.O.D is connected with

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Organic matter

Microbes

Mircrobes and organic matter

None of the above

Chief source of water and soil pollution is

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Mining

Thermal power plant

Agro-industry

All the above

Ozone hole refers to

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Hole in ozone layers

Reduction in thickness of ozone layer in stratosphere

Reduction of thickness of ozone in troposphere

Increase concentration of ozone

Ultraviolet radiation from sun causes a reaction that produces

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Fluorides

Carbon monoxide

Sulphur dioxide

Ozone

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