Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from
1. sugar industry
2. domestic sewage
3. dairy industry
4. petroleum industry

Subtopic:  Water Pollution |
 57%

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The highest DDT concentration in aquatic food chain shall occur in
1. Eel
2. phytoplankton
3. seagull
4. crab

Subtopic:  Resource Utilisation & Maintenance |
 67%
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Which one of the following statements in not valid for aerosols
1. They are harmful to human health
2. They alter rainfall and monsoon patterns
3. They cause increased agricultural productivity
4. They have negative impact on agricultural land

Subtopic:  Air Pollution |
 75%

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Match the items given in Column I with those given in Column II and select the correct option given below:

A.

Eutrophication

i.

UV-B radiation

B.

Sanitary landfill

ii.

Deforestation

C.

Snow blindness

iii.

Nutrient enrichment

D.

Jhum cultivation

iv.

Waste disposal


 
A B C D
1. ii i iii iv
2. i ii iv iii
3. iii iv i ii
4. i iii iv ii

Subtopic:  Air Pollution | Solid Waste Pollution | Green House Effect & Global Warming | Ozone Layer Depletion |
 94%
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Which of the following is a secondary pollutant?
1. CO
2. O3
3. SO2
4. CO2

Subtopic:  Air Pollution |
 63%

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World Ozone Day is celebrated on
1. 5th June
2. 22nd April
3. 16th September
4. 21st April

Subtopic:  Ozone Layer Depletion |
 69%

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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and releaseof molecular oxygen?
1. Carbon
2. Oxygen
3. Fe
4. CI

Subtopic:  Ozone Layer Depletion |
 88%
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Drinking mineral water with low levels ( ~ 0.02 ppm) of pesticide for long period would
1. Cause cancer of intestine
2. Pesticide accumulation in the body
3. Cause leukaemia
4. Produce immunity against mosquito

Subtopic:  Water Pollution |
 68%

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Nitrogen oxides formed during emission from automobiles and power plants are a source of fine airparticles which lead to
1. Dry acid deposition
2. Photochemical smog
3. Wet acid deposition
4. Industrial smog

Subtopic:  Air Pollution |
 74%

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Which one of the following statements pertaining to pollutant is correct?
1. DDT is nonbiodegradable pollutant
2. Excess fluoride in drinking water causes osteoporosis
3. Excess cadmium in drinking water may cause black foot disease
4. Methyl mercury in water may cause ‘’itaiitai’’ disease.

Subtopic:  Water Pollution |
 73%

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