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Online Tests
PPSC Chemistry Part V Environmental Chemistry Online Test MCQs With Answers
Question # 1
Which of the following agrochemical acts as pollutant.
Choose an answer
Fertilizers
Weedicides
Herbicides
All above
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Question # 2
Which of the following pollutant is not secondary pollutnat.
Choose an answer
SO3
NO2
SO2
Ozone
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Question # 3
The unit of sound pressure level is
Choose an answer
Pascal
Decibel
Newton
Ampere
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Question # 4
Which of the following statement is not related with the effect of thermal pollution.
Choose an answer
Decrease in BOD
Increase in BOD
Reduction in DO
Change in algal production
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Question # 5
Which of the following level is an indicator of hearing loss.
Choose an answer
> 25 dB
< 25 dB
<20 dB
None of these
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Question # 6
Which of the following pollutants results from chemicals petroleum and paper industries.
Choose an answer
SO2
CO
Hydrocarbons
All above
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Question # 7
Drained sewage has B.O.D.
Choose an answer
More than that of water
Less than that of water
Equal to that of water
None of the above
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Question # 8
In biological ecosystem which of the following substance is used by organisms.
Choose an answer
Water
Sunlight
Minerals
All above
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Question # 9
Ozone filters out radiation below.
Choose an answer
o
1000 A
o
2000 A
o
3000 A
o
4000 A
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Question # 10
UV radiation from the sun causes a reaction in the atmosphere that leads to production
Choose an answer
Fluorides
Carbon monoxide
Sulphur dioxide
Ozone
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Question # 11
Which of the following statement is not relevant with nitrous oxide.
Choose an answer
It is a colorless and odourless gas
It is non toxic gas
It is present in the atmosphere in higher concentration
It has high reactivity in the lower atmosphere
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Question # 12
Ozone layer of stratosphere requires protection from indiscriminate use of.
Choose an answer
Fungicides, insecticides, bactericides and medicines
Aerosols and high flying jets
Atomic explosions and industrial wastes
Weather ballons
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Question # 13
Maximum desirable concentration of fluorides according to international standard is.
Choose an answer
10-100 ppm
1 ppm
100-200 ppm
10-20 ppm
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Question # 14
Fish die in water bodies polluted by sewage due to.
Choose an answer
Pathogens
Clogging of gills by silt
Reduction in dissolved oxygen
Foul smell
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Question # 15
Which of the following is renewable energy source.
Choose an answer
Moon
Wind
Sun
Ocean
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Question # 16
Which of the following substance has been advocated as fuel of future.
Choose an answer
O2
N2
H2
H2O
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Question # 17
Biomass refers to all the organic material derived from
Choose an answer
Photolysis
Photosynthesis
Electrolysis
Oxidation
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Question # 18
A high frequency sound has frequency
Choose an answer
100 Hz
200 HZ
300 Hz
500 Hz
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Question # 19
The expected specific waste of food industry is.
Choose an answer
Meats
Nuts
Fats or Oils
All above
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Question # 20
Water is often treated with chlorine to
Choose an answer
Increases oxygen content
Kill germs
Cause sedimentation
Remove insoluble impurities.
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Question # 21
The main active contaminants of uranium processing are.
Choose an answer
U - 235
U-238
Pu -234
All above
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