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| 1. |
The effect of pollution is first and most marked on: |
| A. |
Natural flora of a place |
B. |
Natural balance of our environment |
| C. |
Natural geo-chemical cycles |
D. |
All the above three |
Answer: Option A
Explanation:
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| 2. |
Biological treatment of water pollution is done with the help of: |
| A. |
Lichens |
B. |
Fungi |
| C. |
Phytoplanktons |
D. |
None of the above |
Answer: Option C
Explanation:
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| 3. |
Foul smell in the water tanks, ponds etc, is due to: |
| A. |
Anaerobiosis |
B. |
Aerobiosis |
| C. |
Biological magnification |
D. |
Psammophytes |
Answer: Option B
Explanation:
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| 4. |
Air pollution is not caused by: |
| A. |
Thermal power plant |
B. |
Diesel engine |
| C. |
Hydroelectric power station |
D. |
Pollen grain |
Answer: Option C
Explanation:
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| 5. |
If water pollution continues at its present rate, it will eventually: |
| A. |
Make oxygen molecules unavailable to aquatic life |
B. |
Make nitrates unavailable to aquatic life |
| C. |
Prevent precipitation |
D. |
Stop the water cycle |
Answer: Option A
Explanation:
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| 6. |
Which of the following is likely to have the highest level of DDT deposition in its body? |
| A. |
Eel |
B. |
Crab |
| C. |
Sea gull |
D. |
Phytoplanktons |
Answer: Option C
Explanation:
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| 7. |
Which of the following enhances BOD of water? |
| A. |
Algae |
B. |
Sand |
| C. |
Moss |
D. |
Sugar mill effluents |
Answer: Option D
Explanation:
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| 8. |
The part of earth in which life exists is known as: |
| A. |
Lithosphere |
B. |
Biosphere |
| C. |
Atmosphere |
D. |
Hydrosphere |
Answer: Option B
Explanation:
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| 9. |
Mercury pollution causes a disease: |
| A. |
Methaelo binemia |
B. |
Minimata |
| C. |
Foolish disease |
D. |
Hepatitis |
Answer: Option B
Explanation:
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| 10. |
Heating of earth surface is due to: |
| A. |
Air pollution |
B. |
Water pollution |
| C. |
Soil pollution |
D. |
All of these |
Answer: Option A
Explanation:
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