Select Question Set:
Q. No.
Assertion(A): DNA and proteins of living organisms preferentially absorb UV rays.
Reason(R): The high energy of UV rays breaks chemical bonds in DNA and proteins.
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: Ozone Layer Depletion |
51%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Assertion(A): Nuclear waste is an extremely potent pollutant.
Reason(R): At high doses, nuclear radiations cause cancer.
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.
Reason(R): At high doses, nuclear radiations cause cancer.
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: Agrochemical & Radioactive Waste |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Assertion(A): Greenhouse warms up like a car parked in the sun.
Reason(R): The glass panel of the greenhouse lets the light in and allows the heat to escape.
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.
Reason(R): The glass panel of the greenhouse lets the light in and allows the heat to escape.
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: Green House Effect & Global Warming |
72%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2024 GoodEd Technologies Pvt. Ltd.