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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQs With Answers
Question # 1
Heat balance of earth is maintained by
Choose an answer
Atmosphere
Hydrosphere
Lithosphere
Stratosphere
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Question # 2
Which one of the following is not air pollutant gas
Choose an answer
CO
CO
2
NO
SO
2
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Question # 3
How much quantity of water is in the domestic use
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0.08%
16%
24%
90%
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Question # 4
In Purification of potable water the coagulant used is
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nickel sulpahte
copper sulpahte
barium sulphate
alum
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Question # 5
For incineration temperature range is (in
o
C)
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700-800
800-900
900-1000
1000-1100
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Question # 6
It is a biodegradable pollutant
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Salts of HG
DDt
Aluminum foil
Domestic fuel
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Question # 7
Poisoning of CO can be reveresed by giving oxygen at pressure:
Choose an answer
low
least
medium
High
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Question # 8
Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects:
Choose an answer
Eyes
Ears
Stomach
Nose
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Question # 9
Why a C - Cl bond breaks by uv light
Choose an answer
Cl is most electronegative
Cl is volatile
C - Cl bond energy is smaller than that of C - H bond energy
Uv light provides energy which is sufficient to break C - Cl bond and not C - H bond
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Question # 10
When chlorofluoro carbon are subjected to U.V they form
Choose an answer
Cations
Aninons
Free radicals
None of these
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Question # 11
Atmosphere consists of gasses:
Choose an answer
N
2
O
2
Ar
All
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Question # 12
One of the environment problem is the formation of oil slicks when oil is spilled from tankers in sea water.
Which treatment is suitable to remove oil slicks
Choose an answer
blow air
add Na
2
CO
3
use a specially made sorbent having fluorine trapped in it
Use a sorbent having Al
2
O
3
trapped in it
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Question # 13
During thunderstorms, water dissolves
Choose an answer
Dust particles
HCl
Nitric acid
Clouds
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Question # 14
Unit of ozone is?
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Debye
Dobson
Esu
Coulumb
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Question # 15
Detergent greatly effects the
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Aquatic life
Modern life
Terrestrial life
Plants life
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Question # 16
Contamination of water of tanning industries is due to:
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Cr(III)
Cr(VI)
Mn(III)
Mn(VII)
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Question # 17
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
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Question # 18
Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil
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diffusion
convection
electrophoresis
chromatography
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Question # 19
The pH rain of acid rain is
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8 - 7
7 - 6.5
6.5 - 6
less than 5
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Question # 20
Augus smith discovered in the mid of seventeenth century:
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acid
Base
Acid rain
Fertilizer
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Question # 21
Hard water can block radiators due to formation of
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Insoluble calcium and magnesium salts
Insoluble sodium salts
In soluble phosphate salts
Insoluble potassium salts
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