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Q. No.
Assertion(A): Burning of fossil fuels is harmful to humans, animals, and plants.
Reason(R): These air pollutants must be removed to keep our air clean.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Air Pollution |
65%
From NCERT
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Bhopal Gas Tragedy, 1984, was due to the leakage of:
| 1. | radioactive wastes |
| 2. | genetically modified hazardous microbes |
| 3. | methyl isocyanate gas |
| 4. | chlorofluorocarbons |
Subtopic: Air Pollution |
86%
From NCERT
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Consider the given statements:
| Assertion(A): | Discharge of sewage into rivers can cause mortality of fish and other aquatic creatures downstream from the point of sewage discharge. |
| Reason (R): | Micro-organisms involved in the biodegradation of organic matter in the receiving water body consume a lot of oxygen, and as a result, there is a sharp decline in dissolved oxygen downstream from the point of sewage discharge. |
| 1. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 2. | (A) is True but (R) is False. |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
Subtopic: Water Pollution |
87%
From NCERT
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In India, the Air (Prevention and Control of Pollution) Act came into force in 1981, but was amended to include noise as an air pollutant in:
1. 1982
2. 1985
3. 1987
4. 1989
1. 1982
2. 1985
3. 1987
4. 1989
Subtopic: Air Pollution |
88%
From NCERT
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Which of the following gases is responsible for the least contribution to total global warming?
1. Carbon dioxide
2. Methane
3. CFCs
4. N2O
1. Carbon dioxide
2. Methane
3. CFCs
4. N2O
Subtopic: Green House Effect & Global Warming |
76%
From NCERT
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Consider the two statements:
| Assertion (A): | A high dose of UV-B causes inflammation of cornea, called snow-blindness. |
| Reason (R): | UV radiation of wavelengths shorter than UV-B are almost completely absorbed by Earth’s atmosphere, given that the ozone layer is intact. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Ozone Layer Depletion |
From NCERT
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Compressed natural gas (CNG) is a fuel gas mainly composed of:
1. Hydrogen
2. Methane
3. Ammonia
4. Sulphur dioxide
1. Hydrogen
2. Methane
3. Ammonia
4. Sulphur dioxide
Subtopic: Air Pollution |
83%
From NCERT
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Consider the two statements:
| Statement I: | Irrigation without proper drainage of water leads to water-logging in the soil. |
| Statement II: | Besides affecting the crops, water-logging draws salt to the surface of the soil. |
| 1. | Statement I is incorrect; Statement II is correct |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Water Pollution |
84%
From NCERT
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Consider the two statements:
| Assertion (A): | Primary contaminants for accelerated eutrophication of lakes are nitrates and phosphates. |
| Reason (R): | Nitrates and phosphates are plant nutrients which over-stimulate the growth of algae. |
| 1. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
| 3. | (A) is False but (R) is True. |
| 4. | (A) is True but (R) is False. |
Subtopic: Water Pollution |
87%
From NCERT
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Consider the given two statements:
| Assertion (A): | Recycling, an essential element of e-waste management, must be carried out properly especially in developing countries. |
| Reason (R): | Informally recycling – much of it by hand in developing countries, exposes workers to hazardous and carcinogenic substances such as mercury, lead and cadmium. |
| 1. | (A) is true (R) but is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True and but (R) does not correctly explain (A) |
| 4. | Both (A) and (R) are False |
Subtopic: Solid Waste Pollution |
73%
From NCERT
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