Question # 1

Which causes water pollution?

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Smoke/fly ash

Automobile exhausts

Aeroplnes

2,4-D and pesticides

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

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

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

Result of ozone hole is

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Green house effect

Global warming

Acid rain

UV rays reach the earth

Which is not a method for solid waste management

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Landfill

Incinerating

Recycling

None of these

Carbon monoxide is pollutant as it

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Inactivates nerves

Inhibits glycolysis

Combines with oxygen

Combines with hemoglobin

Which one is not a pollutant normally?

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Hydrocarbons

Carbon dioxide

Carbon monoxide

Sulphur dioxide

Which of the following forms a toxic substance in blood by combing with hemoglobin?

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Carbon dioxide

Carbon monoxide

Oxygen

Methane

When chlorofluoro carbon are subjected to U.V. they form

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Cations

Anions

Free radicals

None of these

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

Drained sewage has B.O.D

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More than that of water

Less than that of water

Equal to that of water

None 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

Which one is the most toxic?

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Carbon

CO

CO₂

SO₂

Spraying of DDT produces pollution of

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Air

Air and water

Air and soil

Air, water and soil

Chief air pollutant which is likely to deplete ozone layer

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Sulphure dioxide

Carbon dioxide

Nitrogen oxides and chloro fluorocarbons

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

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

The toxic organic compounds and heavy metals and metalloids results in contamination of

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Surface water

Ground water

Both surface and ground water

Neither surface nor ground waters

Atomospheric pollutant is

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CO₂

CO

O₂

N₂

In the atmosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

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

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Environmental pollution affects

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Biotic components

Plants only

Man only

Biotic and abiotic components of environment

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

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

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Low value

Higher value

Both values

None of these

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

Biodegradable pollutant is

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Plastic

Asbestos

Sewage

Mercury

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ECAT Chemistry Chapter 27 Environmental Chemistry Online Test MCQs With Answers

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