Properties of Air and Water NDA Questions

NDA Chemistry

Properties of Air and Water MCQ Questions


7.
CFC stands for
A.
Chloro Fluoride Carbon
B.
Carbon Fluoride Chlorine
C.
Both a and b
D.
Chloro Fluoro Carbon
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ANSWER :
D. Chloro Fluoro Carbon
8.
Which of the following are the effects of air pollution?
A.
Tuberculosis
B.
Cardiovascular damage
C.
Fatigue
D.
All the above
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ANSWER :
D. All the above
9.
Which is the lowest layer of the atmosphere?
A.
Mesosphere
B.
Stratosphere
C.
Troposphere
D.
Exosphere
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ANSWER :
C. Troposphere
10.
Troposphere is the densest layer and almost _______% of the air in the atmosphere is found in this layer.
A.
75
B.
25
C.
12
D.
10
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ANSWER :
A. 75
11.
Which of the following are found in troposphere?
A.
Clouds
B.
Rain
C.
Snow
D.
All the above
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ANSWER :
D. All the above
12.
Stratosphere extends from the top of the troposphere to about ______ km above the ground.
A.
17
B.
50
C.
68
D.
29
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ANSWER :
B. 50