1. | Glasgow | 2. | Sharm el-Sheikh |
3. | Doha | 4. | Paris |
I:
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Even a brief exposure to an extremely high sound level of 150 dB may damage ear drums and permanently impair hearing ability.
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II:
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Noise also causes sleeplessness, increased heart beat, altered breathing pattern, thus leading to considerable stress in humans.
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The Environment [protection] Act to protect and improve the quality of our environment [Air, Water and Soil] was passed by the Government of India in:
1. | 1974 | 2. | 1981 |
3. | 1986 | 4. | 1988 |
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I: | At least 1.0% impurities must be present in a sample of domestic sewage to make it unfit for human use. |
II: | Waste water from industries often contains toxic heavy metals like mercury, cadmium, copper and lead that have a density greater than 5 gm/cm3. |
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1. | A to B | |
2. | B to C | |
3. | C to D | |
4. | D to E |
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1. | Normally the cause if an excess of nutrients applied to the soil. |
2. | Some nutrients leach into the soil and get drained into the water body. |
3. | Some nutrients run off over the ground into the body of water. |
4. | The excess nutrients cause an algal bloom. |
7. | Eventually, the algal bloom dies, sinks to the bottom of the lake, gets decomposed by bacteria which increases the dissolved oxygen in the water body. |
8. | Increased dissolved oxygen content is dangerous to larger life forms. |
1. | All | 2. | All except 7 and 8 |
3. | All except 1, 3, and 4 | 4. | Only 1 and 2 |
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Assertion (A): | Irrigation without proper drainage of water has a very detrimental effect on crops. |
Reason (R): | It draws salt to the surface of the soil which is inimical to the growth of crops. |
1. | Both (A) and (R) are true but (R) does not explain (A). |
2. | (A) is true but (R) is false. |
3. | (A) is false but (R) is true. |
4. | Both (A) and (R) are true and (R) explains (A). |
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A | Desertification | A type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly arid. |
B | Soil erosion | A form of soil degradation, it is the denudation of the fertile top layer of the soil. |
C | Water-logging | It is the saturation of soil with water where the soil is nearly saturated with water much of the time such that its air phase is restricted and anaerobic conditions prevail. |
D | Soil Salinity | It is the salt content in the soil; the process of increasing the salt content is known as salinization. |
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Statement I: | Biomagnification can never occur in terrestrial ecosystems. |
Statement II: | Inorganic fertilisers and pesticides are not toxic to non-target organisms. |
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Assertion (A): | Nuclear waste is an extremely potent pollutant and has to be dealt with utmost caution. |
Reason (R): | Radiation that is given by nuclear waste causes mutations at a very high rate. |
1. | Both (A) and (R) are true but (R) does not explain (A). |
2. | (A) is true but (R) is false. |
3. | (A) is false but (R) is true. |
4. | Both (A) and (R) are true and (R) explains (A). |
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