Assertion (A): | Photochemical smog is a primary air pollutant. |
Reason (R): | It is formed in traffic-congested cities where the conditions are cold and the intensity of solar radiation is less. |
In the light of the above statements, choose the most appropriate answer from the options given below:
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. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Motor vehicles equipped with catalytic converters should use unleaded petrol. |
Reason (R): | Lead poisoning affects brain and is responsible for many cases of intellectual disabilities. |
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. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | The presence of Tubifex in a water sample is a good indicator of high quality [non-polluted] of the water sample. |
Reason (R): | Tubifex is a nematode that cannot survive in water with low dissolved oxygen content. |
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. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Ecological sanitation is a practical, hygienic, efficient, and cost-effective solution to human waste disposal. |
Reason (R): | Ecological sanitation systems are systems that allow for the safe recycling of nutrients to crop production in such a way that the use of non-renewable resources is minimized. |
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. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Recycling is the best solution for the treatment of electronic waste, provided it is carried out in an environment-friendly manner. |
Reason (R): | It can be easily done with manual participation without exposure to toxins. |
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. |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Burying radioactive waste in a suitably shielded container deep in the rocks is a method not agreeable to many people. |
Reason (R): | According to them, the best solution will be disposal of nuclear waste in space. |
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. |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Wetlands are the largest natural source of atmospheric methane in the world, and therefore remain a major area of concern with respect to climate change. |
Reason (R): | Wetlands are characterized by water-logged soils and distinctive communities of organisms that have evolved and adapted to the constant presence of water. |
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. |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Episodic shifts in winds and water currents across the equatorial Pacific can cause floods in the South American desert while stalling and drying up the monsoon in Indonesia and India. |
Reason (R): | During an El Niño event, the surface waters in the central and eastern Pacific Ocean become significantly colder than usual. |
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. |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | Slash-and-char is an alternative to slash-and-burn that has a lesser effect on the environment. |
Reason (R): | It is the practice of charring the biomass resulting from the slashing, instead of burning it. |
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. |
A genetically modified organism has been tried for mitigating the effects of:
1. Oil spills
2. Degrading CFCs
3. Reduce methane emission
4. Removing DDT from water bodies