Q. No.High value of BOD (Biochemical Oxygen Demand) indicates that:
1. water is highly polluted
2. water is less polluted
3. consumption of organic matter in the water is higher by the microbes
4. water is pure
1. water is highly polluted
2. water is less polluted
3. consumption of organic matter in the water is higher by the microbes
4. water is pure
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Rachel Carson's famous book "Silent Spring" is related to :
1. Noise pollution
2. Population explosion
3. Ecosystem management
4. Pesticide pollution
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:
1. Methane
2. Nitrous oxide
3. Ozone
4. Ammonia
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Joint Forest Management Concept was introduced in India during:
1. 1990s
2. 1960s
3. 1970s
4. 1980s
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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
The highest DDT concentration in aquatic food chain shall occur in
1. Eel
2. phytoplankton
3. seagull
4. crab
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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
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 |
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