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Q. No.Increased concentration of DDT in fish-eating birds is due to
1. eutrophication
2. bio-magnification
3. cultural eutrophication
4. accelerated eutrophication
Subtopic: Water Pollution |
From NCERT
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Ozone gas is continuously formed in the stratosphere by
1. Action of UV rays on nascent oxygen
2. Reaction of oxygen with water vapour
3. Action of UV rays on molecular oxygen
4. Action of UV rays on water vapour
1. Action of UV rays on nascent oxygen
2. Reaction of oxygen with water vapour
3. Action of UV rays on molecular oxygen
4. Action of UV rays on water vapour
Subtopic: Ozone Layer Depletion |
From NCERT
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Subtopic: Water Pollution |
From NCERT
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Ozone depletion in stratosphere would result in:
1. Forest trees
2. global warming
3. skin cancer incidence
4. None of the above
1. Forest trees
2. global warming
3. skin cancer incidence
4. None of the above
Subtopic: Ozone Layer Depletion |
64%
From NCERT
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What is the main cause of the extinction of some species in tropical forests?
1. Deforestation
2. Afforestation
3. Pollution
4. Soil erosion
1. Deforestation
2. Afforestation
3. Pollution
4. Soil erosion
Subtopic: Deforestation |
81%
From NCERT
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Subtopic: Air Pollution |
55%
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What it is called when thousands of aquatic species are killed over a wide range in sea:
1. Bateson-effect
2. El Nino effect
3. Warburg effect
4. None
1. Bateson-effect
2. El Nino effect
3. Warburg effect
4. None
Subtopic: Green House Effect & Global Warming |
72%
From NCERT
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Eutrophication is caused due to?
1. accumulation of minerals
2. effect of UV-C
3. accumulation of metals only
4. accumulation of Zooplankton
1. accumulation of minerals
2. effect of UV-C
3. accumulation of metals only
4. accumulation of Zooplankton
Subtopic: Water Pollution |
87%
From NCERT
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Eutrophication is caused due to?
1. Accumulation of minerals
2. Effect of UV-C
3. Accumulation of metals only
4. Accumulation of zooplankton
1. Accumulation of minerals
2. Effect of UV-C
3. Accumulation of metals only
4. Accumulation of zooplankton
Subtopic: Water Pollution |
70%
From NCERT
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Select the incorrect match.
| 1. | Amrita Devi Bishnoi award | - | Wildlife protection award |
| 2. | Chipko movement | - | by local women in 1974 |
| 3. | Joint forest management | - | Started by government, no participation of local communities |
| 4. | Reforestation | - | may occur naturally |
Subtopic: Resource Utilisation & Maintenance |
61%
From NCERT
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