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Online Tests
Chemistry 10th Class English Medium Unit 14 Online Test MCQs With Answers
Question # 1
About 99% atmosphere's lies within:
Choose an answer
30 kilometre
35 kilometre
15kilometre
11 kilometre
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Question # 2
pH of acid rain is:
Choose an answer
7-5
6-7
1-2
4-5
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Question # 3
Which gas protects the Earth's surface from ultraviolet radiations?
Choose an answer
CO
2
CO
N
2
O
3
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Question # 4
Which factor determines the severity of a pollutant?
Choose an answer
Chemical nature
concentration
Persistence
All of them
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Question # 5
Ozone depletion was first noticed is.
Choose an answer
1970's
1980's
1990's
1960's
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Question # 6
Ozone is an allotropic form of
Choose an answer
Carbon
Oxygen
Sulphur
Phosphorous
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Question # 7
ozone depletion (i.e O3--------------> O2 + O) occurs in:
Choose an answer
lower stratosphere
middle stratosphere
upper stratosphere
troposphere
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Question # 8
75% atmosphere mass lies in how many kilometers.
Choose an answer
11 km
30 km
50 km
85 km
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Question # 9
Ozone is formed in:
Choose an answer
Troposphere
Stratosphere
Mesosphere
Thermosphere
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Question # 10
Which gas is responsible in warming the atmosphere?
Choose an answer
Nitrogen
Hydrogen
Helium
Fluorine
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Question # 11
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 # 12
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 # 13
How many percentage of sunlight is absorbed by atmosphere gases.
Choose an answer
12%
18%
24%
30%
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