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| 171. |
BOD value of sewage water than that of tap water is: |
| A. |
More |
B. |
Less |
| C. |
Equal |
D. |
Somewhere more somewhere less |
Answer: Option A
Explanation:
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| 172. |
Phosphate pollution is caused by: |
| A. |
Phosphate rock only |
B. |
Agricultural fertilizers only |
| C. |
Sewage and phosphate rock |
D. |
Sewage and agrcultural fertilizers |
Answer: Option D
Explanation:
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| 173. |
Which one of the following organisms is used as indicator of water quality? |
| A. |
Beggiota |
B. |
Chlorella |
| C. |
Azospirillium |
D. |
Escherichia |
Answer: Option D
Explanation:
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| 174. |
Spraying of DDT on crops produces pollution of |
| A. |
Soil and water |
B. |
Air and soil |
| C. |
Crops and air |
D. |
Air and water |
Answer: Option B
Explanation:
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| 175. |
Formation of ozone hole is maximum over: |
| A. |
China |
B. |
Antarctica |
| C. |
Europe |
D. |
Africa |
Answer: Option B
Explanation:
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| 176. |
The river sone receives wastes from: |
| A. |
Refinery |
B. |
Distillary |
| C. |
Textile mill |
D. |
Paper mill |
Answer: Option A
Explanation:
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| 177. |
Air pollution effects are usually found on: |
Answer: Option A
Explanation:
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| 178. |
Carbon monoxide is a major pollutant of: |
Answer: Option B
Explanation:
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| 179. |
Which one is not dangerous for life? |
| A. |
Biopollutants |
B. |
Ozone layer |
| C. |
Nuclear blast |
D. |
Deforestation |
Answer: Option B
Explanation:
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| 180. |
In coming years, skin related disorders will be more common due to: |
| A. |
Pollutants in air |
B. |
Use of detergents |
| C. |
Water pollution |
D. |
Depletion of O3 layer |
Answer: Option D
Explanation:
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