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ECAT Chemistry Chapter 27 Environmental Chemistry Online Test MCQs With Answers
Question # 1
The pH range of the acid rain is
Choose an answer
8 - 7
7 - 6.5
6.5 - 6
Less than 5
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Question # 2
A pollutant affects
Choose an answer
Human health
Quality of life
Functioning of ecosystem
All of these
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Question # 3
Surface 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
Choose an answer
Live stock waste
Oil leaks and spills
Disposal of industrial effluents
Rain
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Question # 4
The amount of oxygen in the lithosphere is about
Choose an answer
35.50%
40.60%
56.60%
50.50%
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Question # 5
Which of the following waste material is not recycled for use again
Choose an answer
Paper
Plastic
Hides of animals
Glass
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Question # 6
Result of ozone hole is
Choose an answer
Green house effect
Global warming
Acid rain
UV rays reach the earth
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Question # 7
Ozone in most of the tropical regions acts as a pollutant and causes
Choose an answer
Damages to eyes
Aggravates asthma
Chest discomfort
All of these
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Question # 8
Which one is the major reason for pollution in high cities?
Choose an answer
Fossil fuel
Acid rain
Heat dispersion
None of the above
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Question # 9
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
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Question # 10
Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
Choose an answer
Live stock waste
Agricultural pesticides
Oil breaks and spills
All of the above
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Question # 11
The region of earth capable of supporting life is
Choose an answer
Hydrosphere
Lithosphere
Biosphere
Atmosphere
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Question # 12
Carbon monoxide is pollutant as it
Choose an answer
Inactivates nerves
Inhibits glycolysis
Combines with oxygen
Combines with hemoglobin
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Question # 13
B.O.D is connected with
Choose an answer
Organic matter
Microbes
Mircrobes and organic matter
None of the above
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Question # 14
The 95.5% mass of Lithosphone is made of 11 elements i.e. O
2
, Si, Al, Fe, Ca, Na, K, Mg, Ti, H
2
and P. which element is present in trace amount
Choose an answer
Iodine
Bromine
Lead
Carbon
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Question # 15
SO
2
and NO
2
produce pollution by increasing
Choose an answer
Alkalinity
Acidity
Neutrality
Buffer action
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Question # 16
When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
Choose an answer
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
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Question # 17
Phosphate pollution is caused by
Choose an answer
Weathering of phosphate rocks only
Agricultural fertilizers
Phosphate rocks and sewage
Sewage and agricultural fertilizers
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Question # 18
Which of the following is not an air
Choose an answer
N
2
N
2
O
NO
CO
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Question # 19
Potable water is considered to be
Choose an answer
Safe for human consumption
Not safe for human consumption
The surface water
The ground water
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Question # 20
A single chlorine free radical can destroy how many ozone molecules
Choose an answer
100
100000
10000
10
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Question # 21
Chromium (VI) is highly toxic and can cause
Choose an answer
Blindness
Cancer
Liver problems
Blood problems
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Question # 22
Water is often treated with chlorine to
Choose an answer
Increase oxygen content
Kill germs
Remove hardness
Remove suspended particles
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Question # 23
Environmental pollution affects
Choose an answer
Biotic components
Plants only
Man only
Biotic and abiotic components of environment
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Question # 24
Water which his considered to be safe for human consumption is known as
Choose an answer
Distilled water
Contaminated water
Potable water
Rain water
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Question # 25
The normal amount of overhead ozone is about
Choose an answer
250 Du
300 DU
350 DU
400 DU
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Question # 26
Carbon monoxide is harmful to human beings as it
Choose an answer
Is carcinogenic
Is antagonistic to CO
2
Has higher affinity for hemoglobin as compared to oxygen
Is destructive to O
3
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Question # 27
Air pollution is not caused by
Choose an answer
Pollen grains
Hydroelectric power
Industries
Automobiles
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Question # 28
Which of the following forms a toxic substance in blood by combing with hemoglobin?
Choose an answer
Carbon dioxide
Carbon monoxide
Oxygen
Methane
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Question # 29
To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
Choose an answer
Ag
+
Cu
2+
Al
3+
Si
4+
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Question # 30
Soil salinity can be measured by
Choose an answer
Calorimeter
Potometer
Porometer
Conducitvity meter
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Question # 31
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
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