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Q. No.
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 |
71%
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 |
69%
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 |
83%
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 |
73%
From NCERT
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Environment Protection Act protects the quality of
a. Air
b. Water
c. Soil
d. Environment
1. Only c
2. Only b and c
3. Only a
4. All a, b, c and d
a. Air
b. Water
c. Soil
d. Environment
1. Only c
2. Only b and c
3. Only a
4. All a, b, c and d
Subtopic: Introduction to Pollution & Types |
90%
From NCERT
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Harmful effects of air pollutants depend upon
a. Organism exposed
b. Duration of exposure
c. Concentration of pollutants
1. Only a
2. Only c
3. Only a and b
4. All a b and c
a. Organism exposed
b. Duration of exposure
c. Concentration of pollutants
1. Only a
2. Only c
3. Only a and b
4. All a b and c
Subtopic: Air Pollution |
87%
From NCERT
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Which of the following is not used for controlling air pollution in Delhi?
1. Phasing out of old vehicles
2. Use of unleaded petrol
3. Use of low sulphur petrol and diesel
4. Use of electrostatic precipitator in vehicles
1. Phasing out of old vehicles
2. Use of unleaded petrol
3. Use of low sulphur petrol and diesel
4. Use of electrostatic precipitator in vehicles
Subtopic: Air Pollution |
68%
From NCERT
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'Polyblend' geveloped by Ahmad Khan is a
1. Method for dealing with electronic wastes
2. Method for dealing synthetic fibers
3. Possible solution to accumulating plastic wastes
4. Product used in organic farming
1. Method for dealing with electronic wastes
2. Method for dealing synthetic fibers
3. Possible solution to accumulating plastic wastes
4. Product used in organic farming
Subtopic: Solid Waste Pollution |
86%
From NCERT
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State true (T) or false (F) for the followin statements and select the correct option.
| A. | Bad ozone is formed in the troposphere. |
| B. | Good ozone is formed in the stratosphere and act as shield against UV rays. |
| C. | UV A may cause snow blindness. |
| A | B | C | |
| 1. | T | T | T |
| 2. | T | F | T |
| 3. | T | T | F |
| 4. | F | T | F |
Subtopic: Ozone Layer Depletion |
64%
From NCERT
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In the wake of green revolution problems that have come are
a. Waterlogging
b. Soil salinity
c. Desertification
d. Ozone depletion
1. a and b
2. b and c
3. c and d
4. a and d
a. Waterlogging
b. Soil salinity
c. Desertification
d. Ozone depletion
1. a and b
2. b and c
3. c and d
4. a and d
Subtopic: Resource Utilisation & Maintenance |
62%
From NCERT
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