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Q. No.Given below are two statements:
Assertion (A):
Problems due to use of chemical fertilisers in agriculture are extremely grave.
Reason (R):
Agrochemicals can't be toxic to non-target organisms that are important components of the soil ecosystem
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: Agrochemical & Radioactive Waste |
57%
From NCERT
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Given below are two statements:
| Assertion (A): | Greenhouse effect heats up earth's surface |
| Reason (R): | Half of incoming solar radiations as well as heat energy released by gases like CO2 and methane cause increase in temperature of earth's surface. |
| 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: Green House Effect & Global Warming |
67%
From NCERT
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Given below are two statements:
| Assertion (A): | There is increase in melting of Himalayan snow caps and polar ice caps. |
| Reason (R): | Rise in temperature is leading to s1,Jch deleterious changes in the environment. |
| 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: Green House Effect & Global Warming |
73%
From NCERT
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Given below are two statements:
| Assertion (A): | Forest can be conserved in a sustainable manner. |
| Reason (R): | Forest purifies air and makes it useful to animals. |
| 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: Deforestation |
59%
From NCERT
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Given below are two statements:
| Assertion (A): | Depletion of ozone is particularly marked over the Antartic region. |
| Reason (R): | Ozone depletion is occurring widely in the stratosphere due to pollutants like CFCs. |
| 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 |
59%
From NCERT
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Given below are two statements:
| Assertion (A): | Thermal wastewater constitutes important category of pollutants |
| Reason (R): | Thermal wastewater eliminates high temperature-sensitive plants and fishes in extremely cold areas. |
| 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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Given below are two statements:
| Assertion (A): | Water pollutants like mercury and DDT undergo biomagnification. |
| Reason (R): | Toxic substances cannot be metabolised or excreted thus they accumulate in the organism. Then, they passed on to the next higher trophic level. |
| 1. | Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. |
| 2. | Both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. |
| 3. | Assertion is true but Reason is false. |
| 4. | Both Assertion and Reason are false. |
Subtopic: Water Pollution |
72%
From NCERT
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Catalytic converters are fitted into automobiles for reducing emission of poisonous gases. It is done by
| 1. | Reducing the amount of unburnt hydrocarbons before exhaust formation |
| 2. | Converting NOx to nitrogen |
| 3. | Reducing lead in the exhaust |
| 4. | Converting carbon dioxide into carbon monoxide |
Subtopic: Air Pollution |
74%
From NCERT
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Slash and burn agriculture leads to nutrient depletion in soil and deforestation if
1. Legumes are implanted rather than cereals
2. Sufficient time is not given to the land to recover
3. It is done in a smaller area
4. Some useful trees are not uprooted
1. Legumes are implanted rather than cereals
2. Sufficient time is not given to the land to recover
3. It is done in a smaller area
4. Some useful trees are not uprooted
Subtopic: Deforestation |
88%
From NCERT
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CFCs have a continuing effect on ozone layer as
| 1. | CFCs are being produced in high amounts all over the world |
| 2. | CFCs release fluorine atoms which degrade ozone |
| 3. | Cl atoms formed by them act as catalyst in reaction causing degradation of ozone |
| 4. | Cl atoms formed by CFCs are used up in the reaction causing degradation of ozone |
Subtopic: Ozone Layer Depletion |
78%
From NCERT
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