MCQ on Environmental Issues

1. Pollutants resulting from human activities are mainly discharged in:
a) overpopulated cities
b) industrial centres
c) rural area
d) both a and b

2.  Atmospheric pollution may be caused by
Sources of emissions of Air pollution
a) forest fire
b) organic decay
c) automobile exhausts
d) all of these

 3. Example of primary pollutant
a) SO2
b) NO2
c) CO
d) all of these

4. Pollutants are classified into:
a) biodegradable
b) qualitative
c) nonbiodegradable
d) all of these

5. Example of secondary pollutants :
a) Smog
b) O3
c) PAN
d) all of these

6. Oxidation of sulphur in the fossil fuels mainly produces:
a) NO
b) SO3
c) SO2
d) both b and c

7. The effect of the gaseous pollutants depend mainly on their:
a) Solubility in water
b) hydrophobic in nature
c) ability to settle down
d) longevity in air

8. Carbon dioxide content in atmosphere is
a) 93%
b) 0.5%
c) 0.03%
d) 0.001%

9. The polluting strength of sewage is usually characterized by its:
a) BOD
b) nitrogen content
c) ozone content
d) eutrophication

10. Biomagnification is caused mainly by
a) organochlorines
b) neem oil
c) organophosphates
d) all of these

Learn more:
1. d) both a and b
2. d) all of these
3. d) all of these
4. d) all of these
5. d) all of these
6. a) Solubility in water
7. d) both b and c
8. c) 0.03%
9. a) BOD
10. a) organochlorines
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