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Q. No.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
Subtopic: Air Pollution |
87%
From NCERT
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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
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 |
75%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
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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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The concentration of methane in the atmosphere has been doubled in last 250 years
Reason R: Wetlands and rice-fields are the major sources of methane
In light of the above statements, choose the most appropriate answer from the options given below
1. Both A and R are correct and R is the correct explanation of A
2. Both A and R are correct but R is NOT the correct explanation of A
3. A is correct but R is not correct
4. A is not correct but R is correct
Assertion A: The concentration of methane in the atmosphere has been doubled in last 250 years
Reason R: Wetlands and rice-fields are the major sources of methane
In light of the above statements, choose the most appropriate answer from the options given below
1. Both A and R are correct and R is the correct explanation of A
2. Both A and R are correct but R is NOT the correct explanation of A
3. A is correct but R is not correct
4. A is not correct but R is correct
Subtopic: Air Pollution | Green House Effect & Global Warming |
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Photochemical smog is composed mainly of
1. CO + NO + PAN
2. HC + NO + PAN
3. O3 + PAN + NO
4. CO + PAN + HC
1. CO + NO + PAN
2. HC + NO + PAN
3. O3 + PAN + NO
4. CO + PAN + HC
Subtopic: Air Pollution |
71%
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Arrange the following stages of lake succession in correct order.
A. Lake's fertility increases, plant & animal life burgeons and organic remains begin to de deposited on the lake bottom
B. Pollutants from the man's activities like effluents from industries and home radically accelerate the aging
C. With time, streams draining into lake introduce the nutrients, encourage the growth of active organisms
D. As slits and organic debris pile up lake grows slower and warmer, marsh plant takes roots in shallows begins to fill basin, gives way to large masses of bog, converting into land
E. Natural aging of lake by nutrients enrichment of its water
Choose the correct answer from the options given below
1. A → C → E → D → B
2. E → C → A → D → B
3. A → C → E → D → B
4. C → A → E → D → B
A. Lake's fertility increases, plant & animal life burgeons and organic remains begin to de deposited on the lake bottom
B. Pollutants from the man's activities like effluents from industries and home radically accelerate the aging
C. With time, streams draining into lake introduce the nutrients, encourage the growth of active organisms
D. As slits and organic debris pile up lake grows slower and warmer, marsh plant takes roots in shallows begins to fill basin, gives way to large masses of bog, converting into land
E. Natural aging of lake by nutrients enrichment of its water
Choose the correct answer from the options given below
1. A → C → E → D → B
2. E → C → A → D → B
3. A → C → E → D → B
4. C → A → E → D → B
Subtopic: Water Pollution |
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Match List I with List II
Choose the correct answer from the options given below:
1. A-(IV), B-(III), C-(II), D-(I)
2. A-(III), B-(IV), C-(II), D-(I)
3. A-(IV), B-(III), C-(I), D-(II)
4. A-(I), B-(II), C-(III), D-(IV)
| List I | List II |
| A. Ramsar Convention | I. Removal of hazardous waste |
| B. Helsinki Declaration | II. Sustainable development |
| C. Agenda-21 | III. Limit the release of CFC |
| D. Basel Convention | IV. Conservation of wetlands |
1. A-(IV), B-(III), C-(II), D-(I)
2. A-(III), B-(IV), C-(II), D-(I)
3. A-(IV), B-(III), C-(I), D-(II)
4. A-(I), B-(II), C-(III), D-(IV)
Subtopic: Air Pollution | Solid Waste Pollution | Ozone Layer Depletion | Resource Utilisation & Maintenance |
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Which one of the following is a wrong statement?
1. Particulate matter of the size 2.5 \(\mu m\) or less can cause inflammation and damage to the lungs
2. A lake which is rich in organic waste may result in the mortality of fishes due to lack of oxygen
3. DDT residues are rapidly passed through food chain because it is water soluble
4. Photochemical smog pollution contain ozone
1. Particulate matter of the size 2.5 \(\mu m\) or less can cause inflammation and damage to the lungs
2. A lake which is rich in organic waste may result in the mortality of fishes due to lack of oxygen
3. DDT residues are rapidly passed through food chain because it is water soluble
4. Photochemical smog pollution contain ozone
Subtopic: Air Pollution | Water Pollution |
68%
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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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NEET 2025 - Target Batch
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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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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
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