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Online Tests
Chemistry 10th Class English Medium Unit 14 Online Test MCQs With Answers
Question # 1
The recombination of O and O
2
in mid stratosphere is an
Choose an answer
Exothermic reaction
Endothermic reaction
Heat absorbing process
None of these
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Question # 2
Depending upon temperature variation, atmosphere ins divided into how many regions?
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1
2
3
4
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Question # 3
Just above the Earth's surface is
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Mesosphere
Stratosphere
Theremosphere
Troposphere
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Question # 4
In the bacterial decay, the compound of which element are emitted.
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Sulphur
Carbon
Nitrogen
All of them
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Question # 5
What gas is the major constituent of troposphere?
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Nitrogen
Oxygen
Hydrogen
Both a and b
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Question # 6
Which one of these pollutants are not found in car exhaust fumes?
Choose an answer
CO
2
O
3
NO
2
SO
2
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Question # 7
Infrared radiation emitted by the earth are absorbed by?
Choose an answer
CO
2
,H
2
O
N
2
,O
2
CO
2
,N
2
O
2
,CO
2
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Question # 8
Ozone layer is not found is
Choose an answer
Upper stratosphere
Mid stratosphere
Lower stratosphere
All of them
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Question # 9
Our planet earth consists of ____________ natural Spheres.
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1
4
6
8
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Question # 10
A group of gases that maintains temperature of atmosphere is.
Choose an answer
Carbon dioxide and water vapours
Nitrogen and carbon dioxide
Thermosphere
Troposphere
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Question # 11
Normaily rain water is weakly acidic because.
Choose an answer
SO
3
CO
2
CO
3
NO
2
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Question # 12
Which factor determines the severity of a pollutant?
Choose an answer
Chemical nature
concentration
Persistence
All of them
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Question # 13
Building and Monuments lose their beauty and shine due to
Choose an answer
U.V radiations
Chlorofluoro carbons
Acid rain
IR radiations.
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