Environmental Chemistry CDS Questions

CDS Chemistry

Environmental Chemistry MCQ Questions


7.
Ground-level (tropospheric) ozone, a key harmful component of photochemical smog, differs from the beneficial ozone found in the:
A.
Thermosphere
B.
Troposphere
C.
Stratosphere
D.
Mesosphere
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ANSWER :
C. Stratosphere
8.
Which secondary pollutant formed during photochemical smog, abbreviated PAN, is known to cause severe irritation of the eyes and damage to plants?
A.
Particulate ammonium nitrate
B.
Photo-active nitrogen
C.
Peroxyacetyl nitrate
D.
Peroxy acid nitride
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ANSWER :
C. Peroxyacetyl nitrate
9.
Particulate matter classified as PM2.5 refers to airborne particles having a diameter smaller than approximately:
A.
2.5 micrometres
B.
25 micrometres
C.
10 micrometres
D.
0.25 micrometres
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ANSWER :
A. 2.5 micrometres
10.
Which heavy metal, once commonly added to petrol as an anti-knock agent, is a hazardous air pollutant that particularly affects the nervous system in children?
A.
Cadmium
B.
Mercury
C.
Lead
D.
Arsenic
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ANSWER :
C. Lead
11.
Acid rain is primarily caused by atmospheric pollutants combining with rainwater to form which two acids?
A.
Acetic acid and citric acid
B.
Sulphuric acid and nitric acid
C.
Hydrochloric acid and carbonic acid
D.
Phosphoric acid and boric acid
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ANSWER :
B. Sulphuric acid and nitric acid
12.
The Bhopal gas tragedy of 1984, one of the world's worst industrial disasters, was caused by the accidental leakage of which toxic gas?
A.
Ammonia gas
B.
Methyl isocyanate (MIC)
C.
Carbon monoxide
D.
Chlorine gas
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ANSWER :
B. Methyl isocyanate (MIC)