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Online Tests
Chemistry Fsc Part 2 Chapter 16 Online Test MCQs With Answers
Question # 1
Water will be considered polluted if it has dissolved oxygen.
Choose an answer
3ppm
4ppm
5ppm
6 ppm
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Question # 2
Ozone is mostly produced in
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Tropical region
North polar region
South polar region
Thermosphere zone of atmosphere
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Question # 3
Which field produces significant amount of methane in the atmosphere
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paddy field
Cotton field
Can sugar field
Wheat field
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Question # 4
The residence time of NO is
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Few hours
1 day
3 days
4 days
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Question # 5
Ecosystem is smaller units of.
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Lithosphere
Hydrosphere
Atmosphere
Biosphere
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Question # 6
Half mass of atmosphere gases is present in.
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5-6 km distance above the surface of earth
10 km above the surface
100 km above the surface
56 km above the surface
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Question # 7
The disease can be eradicated by using pesticides.
Choose an answer
Malaria
Yellow fever
Sleeping sickness
All of these
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Question # 8
The yellowish colour in photochemical smog is due to the presence of.
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NO
NO2
SO2
CO2
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Question # 9
The avoid the formation of toxic compounds with chlorine which substance is used for disinfecting water
Choose an answer
KMnO
4
O
3
Alums
Chloramines
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Question # 10
Whcih water will be considered as polluted water.
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High value of COD
Low value of COD
High value of DO
Low value of BOD
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Question # 11
The news paper can be recycled again and again as many times as
Choose an answer
5
3
4
2
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Question # 12
The pH range of the acid rain is.
Choose an answer
7-6.5
6.5-6
6-6.5
Less than 5
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Question # 13
The thickness of ozone layer is.
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25 to 50 km
25 to 28 km
3 km only
1 km only
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Question # 14
Ozone depletion in stratosphere region is mainly due to the reaction of O3 with
Choose an answer
O2
SO2
CFCs
All of these
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Question # 15
The pH of truly acidic rain is
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7-6.8
6.5-6
6-5.6
less than 5
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Question # 16
The mean residence time of methane in atmosphere in
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1-2 years
3-4 years
3-5 years
3-7 years
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Question # 17
Thickness of atmosphere is about how much kilometer above the surface of warth
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100 km
1000 km
10,000 km
unlimited
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