Environmental Chemistry AFCAT Questions

AFCAT Chemistry

Environmental Chemistry MCQ Questions


7.
Which of the following is the major component of air?
A.
Carbon dioxide (CO2)
B.
Oxygen (O2)
C.
Nitrogen (N2)
D.
Argon (Ar)
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ANSWER :
C. Nitrogen (N2)
8.
Air pollutants that are released directly from sources are called:
A.
Secondary pollutants
B.
Bio-pollutants
C.
Primary pollutants
D.
Tertiary pollutants
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ANSWER :
C. Primary pollutants
9.
Which gas is produced by incomplete combustion of fossil fuels?
A.
Carbon monoxide (CO)
B.
Oxygen (O2)
C.
Carbon dioxide (CO2)
D.
Nitrogen (N2)
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ANSWER :
A. Carbon monoxide (CO)
10.
Why is carbon monoxide (CO) so toxic to humans?
A.
It is corrosive
B.
It causes lung cancer
C.
It binds with haemoglobin more strongly than oxygen, forming carboxyhaemoglobin
D.
It is acidic
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ANSWER :
C. It binds with haemoglobin more strongly than oxygen, forming carboxyhaemoglobin
11.
Acid rain is mainly caused by:
A.
CFCs and ozone
B.
CO2 and CH4
C.
Dust and smoke particles
D.
SO2 and NOx in the atmosphere
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ANSWER :
D. SO2 and NOx in the atmosphere
12.
The pH of normal rainwater is approximately:
A.
8.5
B.
4.0
C.
7.0
D.
5.6
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ANSWER :
D. 5.6