Match each item in Column I with one item in Column II and chose your answer from the codes given below.
Column I | Column II | ||
I. | Environment Act | 1. | 1986 |
II. | Montreal protocol | 2. | 1987 |
III. | Earth summit | 3. | 1992 |
IV. | Kyoto protocol | 4. | 1997 |
Codes:
Options: | I | II | III | IV |
1. | 1 | 2 | 3 | 4 |
2. | 2 | 1 | 4 | 3 |
3. | 2 | 1 | 3 | 4 |
4. | 1 | 2 | 4 | 3 |
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Match each item in Column I with one item in Column II regarding the relative contribution of different greenhouse gases to global warming and choose your answer from the codes given below.
Column I | Column II | ||
I. | Carbon dioxide | 1. | 60% |
II. | Methane | 2. | 20% |
III. | Nitrous oxide | 3. | 14% |
IV. | CFCs | 4. | 06% |
Codes:
Options: | I | II | III | IV |
1. | 1 | 2 | 3 | 4 |
2. | 2 | 1 | 4 | 3 |
3. | 2 | 1 | 3 | 4 |
4. | 1 | 2 | 4 | 3 |
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Consider the following statements:
I. | Catalytic converters are fitted into automobiles for reducing the emission of poisonous gases. |
II. | They convert unburnt hydrocarbons to CO2 and H2O, and CO and NO to CO2 and N2 respectively. |
III. | Vehicles equipped with catalytic converters should use leaded petrol. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
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Consider the following statements:
I. | Noise was added as an air pollutant to the Air (Prevention and Control of Pollution) Act in 1987. |
II. | Montreal protocol was signed in 1987 to control the emission of ozone-depleting substances. |
III. | The Earth Summit for the conservation of biodiversity and sustainable utilization of its benefits was held in 1992. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
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Consider the following statements:
1. | The “bad” ozone is the ozone that is formed in the troposphere. |
2. | The “good ozone” in the stratosphere acts as a shield against harmful UV radiation. |
3. | UV-A radiations can cause skin cancers and snow-blindness cataracts. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
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The richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life is called:
1. dystrophic
2. oligotrophic
3. eutrophic
4. ecotrophic
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Which of the following is not a consequence of deforestation?
1. | An increase in atmospheric carbon dioxide as trees can hold a lot of carbon in their biomass. |
2. | Loss of biodiversity due to habitat destruction. |
3. | A wetter climate as trees can hold a lot of water. |
4. | Soil erosion due to loss of the protective layer of vegetation. |
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Slash and burn agriculture leads to nutrient-depleted soils and deforestation if:
1. crash crops are implanted rather than cereals
2. it is practiced in a sufficiently larger area
3. some useful trees are retained by the farmers
4. sufficient time is not allowed for the land to recover
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Ozone hole is:
1. | a partial gap in the stratospheric ozone layer over Antarctica |
2. | a partial gap in the stratospheric ozone layer over Arctic |
3. | thinning of ozone layers over polar regions |
4. | excessive buildup of lower troposphere ozone |
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Burying the radioactive wastes is not acceptable to many people as:
1. there is a risk of groundwater contamination
2. it may explode
3. it will harm the buried dead bodies
4. it may get accumulated in vegetation
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