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Online Tests
Chemistry 10th Class English Medium Unit 14 Online Test MCQs With Answers
Question # 1
The region in which ozone layere depletes is called.
Choose an answer
Ozone hole
Black hole
Both of them
None of them
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Question # 2
Which one of the following is not air pollutants?
Choose an answer
N
2
CO
NO
2
O
2
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Question # 3
Which pollutant is not found in car exhaust gases?
Choose an answer
CO
O
3
NO
2
SO
3
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Question # 4
pH of acid rain is:
Choose an answer
7-5
6-7
1-2
4-5
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Question # 5
At the height 880120 km from earth's surface is.
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Troposphere
Mesosphere
Stratosphere
Thermosphere
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Question # 6
The formula of ozone is.
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O
2
O
3
O
CO
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Question # 7
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 # 8
Almost all air crafts fly in which reion?
Choose an answer
Troposphere
Stratosphere
Mesosphere
Thermosphere
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Question # 9
Which one of the following is not an air pollutants?
Choose an answer
Nitrogen
Carbon dioxide
Nitrogen oxide
Ozone
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Question # 10
Ozone id beneficial for us as it:
Choose an answer
absorbs infrared radiations
absorbs ultraviolet radiation
absorbs chlorofluorocarbons
absorbs air pollutants
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Question # 11
Percentage of nitrogen in atmosphere is:
Choose an answer
20.94%
78.09%
0.93%
0.03%
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Question # 12
Which of the following is a poisonous gas.
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Oxygen
Ozone
Nitrogen
Carbon dioxide
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Question # 13
Ozone depletion was first noticed is.
Choose an answer
1970's
1980's
1990's
1960's
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