Environmental Issues

Biology
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Which one is not dangerous for life and atmosphere?

A
Biopollutants
B
Ozone layer
C
Nuclear blast
D
Deforestation
Easy
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Biological Oxygen Demand (BOD) is a measure of

A
Industrial wastes poured into water bodies.
B
Extent to which water is polluted with organic compounds.
C
Amount of carbon monoxide inseparably combined with haemoglobin.
D
Amount of oxygen needed by green plants during night.
Easy
AIIMS
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Which of the following is not a greenhouse gas?

A
B
CFC
C
D
Easy
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Which of the following is not a greenhouse gas?

A
Water vapour
B
Carbon monoxide
C
Methane
D
Oxygen
Easy
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CFC are not recommended to be used in refrigerators because they

A
Increase temperature
B
Deplete ozone
C
Affect environment
D
Affect human body
Easy
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Greenhouse effect is due to the presence of

A
Ozone layer in the atmosphere
B
Infrared light reaching the earth
C
Moisture layer in the atmosphere
D
CO layer in the atmosphere
Easy
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Measurement of the rate of oxygen consumption in unit volume of water over a period of time is done to find out

A
Biogas generation
B
Biological oxygen demand
C
Biosynthetic pathways
D
Fermentation
Easy
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Greenhouse effect refers to 

A
Cooling of Earth
B
Trapping of UV rays
C
Production of cereals
D
Warming of Earth
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The result of ozone hole is

A
Acid rain
B
UV radiations reach the surface of earth
C
Global warming
D
Green house effect
Easy
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