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Q. No.Why CNG is considered better fuel than diesel?
a. It cannot be adulterated
b. It takes less time to fill the fuel tank
c. It burns more efficiently
d. It is cheaper
e. It is less inflammable.
Choose the most appropriate answer from the options given below:
1. (a), (b), (c), (e) only
2. (a), (c), (d) only
3. (a), (b), (d), (e) only
4. (c), (d), (e) only
Subtopic: Air Pollution |
76%
From NCERT
NEET - 2022
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According the central pollution control board (CPCB), which particulate size in diameter (in μm) of the air pollutants is responsible for greatest harm to human health?
1. 3.0 or less
2. 4.0 or less
3. 2.5 or less
4. 3.5 or less
1. 3.0 or less
2. 4.0 or less
3. 2.5 or less
4. 3.5 or less
Subtopic: Air Pollution |
87%
From NCERT
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Given below are two statements:
Statement I: Sewage discharge in a flowing river causes a decrease in biochemical oxygen demand (BOD) due to biodegradation of organic matter by microbes. This leads to the mortality of fish and other aquatic creatures.
Statement II: Sewage discharge in a flowing river causes a sharp increase in dissolved oxygen (DO) downstream from point of discharge due to increased consumption of DO by microbes. This leads to the mortality of fish and other aquatic creatures.
In light of the above statements, choose the most appropriate answer from the options given below.
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is true
Statement I: Sewage discharge in a flowing river causes a decrease in biochemical oxygen demand (BOD) due to biodegradation of organic matter by microbes. This leads to the mortality of fish and other aquatic creatures.
Statement II: Sewage discharge in a flowing river causes a sharp increase in dissolved oxygen (DO) downstream from point of discharge due to increased consumption of DO by microbes. This leads to the mortality of fish and other aquatic creatures.
In light of the above statements, choose the most appropriate answer from the options given below.
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is correct but statement II is false
4. Statement I is incorrect but statement II is true
Subtopic: Solid Waste Pollution | Water Pollution |
From NCERT
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The image below [Courtesy NASA] shows ozone hole (blue and purple coloured area) over Antarctica in October 2004. What is true about ozone hole?
1. Only Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Only Statement I is correct.
| Statement I: | The ozone hole is a “hole” where no ozone is present. |
| Statement II: | The ozone hole is a result of catalyzed ozone loss from chlorine and bromine compounds. |
1. Only Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Only Statement I is correct.
Subtopic: Ozone Layer Depletion |
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The picture shows a scene of one of the strongest movements to conserve forests in India.
1. Both Statement I and Statement II are incorrect.
2. Both Statement I and Statement II are correct.
3. Only Statement II is correct .
4. Only Statement I is correct.
| Statement I: | The movement originated in the Garhwal Himalayan region of Uttarakhand (then part of Uttar Pradesh). |
| Statement II: | Although many of its leaders were men, women were not only its backbone, but also its mainstay. |
1. Both Statement I and Statement II are incorrect.
2. Both Statement I and Statement II are correct.
3. Only Statement II is correct .
4. Only Statement I is correct.
Subtopic: Resource Utilisation & Maintenance |
62%
From NCERT
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Carefully read the sign board in the given picture and select the correct statements regarding the possible solution for a grave environment pollutant:
1. Both Statement I and Statement II are incorrect
2. Both Statement I and Statement II are correct
3. Only Statement II is correct
4. Only Statement I is correct
| I: | The polyblend, a fine powder of recycled modified plastic, is mixed with bitumen to lay roads. |
| II: | Polyblend enhances the bitumen’s water repellent properties and helps to increase the road life by a factor of 3. |
1. Both Statement I and Statement II are incorrect
2. Both Statement I and Statement II are correct
3. Only Statement II is correct
4. Only Statement I is correct
Subtopic: Solid Waste Pollution |
90%
From NCERT
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The given diagram shows the schematic representation of reactions in lower stratosphere leading to ozone depletion. Identify the correct matches:
1. All are correctly matched
2. All except D and E are correctly matched
3. Only A, B and C are correctly matched
4. Only D, E and F are correctly matched
| A | UV radiation hits CFC molecule |
| B | Chlorine atom breaks away |
| C | Chlorine atom hits Ozone molecule |
| D | Chlorine atom takes one oxygen molecule and creates chlorine monoxide leaving one atom of oxygen. |
| E | Oxygen molecule hits chlorine monoxide molecule |
| F | Two oxygen atoms form an oxygen molecule and chlorine atom is free. |
2. All except D and E are correctly matched
3. Only A, B and C are correctly matched
4. Only D, E and F are correctly matched
Subtopic: Ozone Layer Depletion |
From NCERT
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Identify the correct statement(s) regarding greenhouse effect:
| I: | The green house effect is a natural phenomenon responsible for heating of earth’s surface and atmosphere. |
| II: | Greenhouse gases absorb short wave UV radiation and emit it again towards the earth. |
| III: | During the past century, the temperature of earth has increased by 60C |
| 1. | Only Statement I |
| 2. | Only Statement III |
| 3. | Only Statement II and Statement III |
| 4. | Only Statement I and Statement II |
Subtopic: Green House Effect & Global Warming |
53%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| 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). |
Subtopic: Agrochemical & Radioactive Waste |
81%
From NCERT
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Consider the given two statements:
1. Both Statement I and Statement II are incorrect
2. Both Statement I and Statement II are correct
3. Only Statement II is correct
4. Only Statement I is correct
| Statement I: | Biomagnification can never occur in terrestrial ecosystems. |
| Statement II: | Inorganic fertilisers and pesticides are not toxic to non-target organisms. |
2. Both Statement I and Statement II are correct
3. Only Statement II is correct
4. Only Statement I is correct
Subtopic: Agrochemical & Radioactive Waste | Water Pollution |
69%
From NCERT
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