Question # 1

Which one is the major reason for pollution in high cities?

Choose an answer

Fossil fuel

Acid rain

Heat dispersion

None of the above

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

Choose an answer

Cations

Anions

Free radicals

None of these

Swage water is purified by

Choose an answer

Microorganisms

Light

Fishes

Aquatic plants

The amount of oxygen in the lithosphere is about

Choose an answer

35.50%

40.60%

56.60%

50.50%

The region of earth capable of supporting life is

Choose an answer

Hydrosphere

Lithosphere

Biosphere

Atmosphere

Chlorofluorocarbon, CF₂CI₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Choose an answer

BOD is

Choose an answer

Biological oxygen deficit

Biosphere oxygen demand

Biological oxygen demand

None of the above

Chief air pollutant which is likely to deplete ozone layer

Choose an answer

Sulphure dioxide

Carbon dioxide

Nitrogen oxides and chloro fluorocarbons

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

Choose an answer

Surface water

Ground water

Both surface and ground water

Neither surface nor ground waters

Ecology is a science of environment and deals specially with

Choose an answer

Stratosphere

Biosphere

Lithosphere

Hydrosphere

Result of ozone hole is

Choose an answer

Green house effect

Global warming

Acid rain

UV rays reach the earth

Water is often treated with chlorine to

Choose an answer

Increase oxygen content

Kill germs

Remove hardness

Remove suspended particles

Which of the following is not an air

Choose an answer

N₂

N₂O

NO

CO

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

Choose an answer

Low value

Higher value

Both values

None of these

Which is not the affect of polluted air on environment

Choose an answer

Acid rain

Smog

Ozone

Global warming

Which of the following human activities are contaminating surface and ground waters

Choose an answer

Pesticides

Septic tanks

Petroleum and natural gas production

All of these

SO₂Makes ______ acid rains

Choose an answer

Carbonic acid

Sulfuric

Nitric acid

All of these

Sulphur dioxide affects

Choose an answer

Cell wall

Plasmodesmata

All membrane systems

Nucleus

Chloroflurocarbon releases a chemical harmful to ozone

Choose an answer

Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Choose an answer

10,000

20,000

100,000

50,000

Depletion of ozone layer is due to

Choose an answer

Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of the above

What is the cause of water pollution

Choose an answer

Chemical and bacterial contents in live stock

The spilled oil in rivers and ponds

Wide spread use of pesticides

All of the above

Spraying of DDT produces pollution of

Choose an answer

Air

Air and water

Air and soil

Air, water and soil

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

Choose an answer

It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

Exposure to CO results in

Choose an answer

Headache

Fatigue

Unconsciousness

All of these

The pH range of the acid rain is

Choose an answer

8 - 7

7 - 6.5

6.5 - 6

Less than 5

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Choose an answer

2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Oceans cove ______ percent of the surface of the earth

Choose an answer

60

70

80

97

Minamata disease is due to pollution of

Choose an answer

Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

As it passes into food chain, the concentration of DDT

Choose an answer

Remains same

Decreases

Increases

Unpredictable

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

Choose an answer

Combining with oxygen to form carbon dioxide

Destruction of hemoglobin

Preventing reaction between oxygen and hemoglobin

Forming stable compound with hemoglobin

More Classes

Other Links

ECAT Chemistry Chapter 27 Environmental Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer