Q. No.The following diagram shows the working of an electrostatic precipitator. Identify the correct statement:
1.
A negative voltage ionizes the air around the wire that in turn ionizes the particles in the air stream.
2.
They are able to remove about 75% of the particulate matter present in the exhaust from a thermal power plant.
3.
The velocity of air between the plates must be rapid enough to allow electrostatic precipitation of the dust particles.
4.
PM 2.5 dust particles are more easily removed by the electrostatic precipitator than larger sized particulate matter.
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Which award is given to individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting wildlife?
1. Venu Menon Animal Allies Award
2. Amrita Devi Bishnoi Award
3. David Shepherd Wildlife Award
4. The Pledge Award
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Which of the following is not a consequence of deforestation?
| 1. | An increase in atmospheric carbon dioxide as trees can hold a lot of carbon in their biomass. |
| 2. | Loss of biodiversity due to habitat destruction. |
| 3. | A wetter climate as trees can hold a lot of water. |
| 4. | Soil erosion due to loss of the protective layer of vegetation. |
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Slash and burn agriculture leads to nutrient-depleted soils and deforestation if:
1. crash crops are implanted rather than cereals
2. it is practiced in a sufficiently larger area
3. some useful trees are retained by the farmers
4. sufficient time is not allowed for the land to recover
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According to the recommendations of the National Forest Policy of 1988, what percentage of the area is recommended as forest cover for hills?
| 1. | 19 | 2. | 33 |
| 3. | 50 | 4. | 67 |
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The Montreal Protocol was signed in 1987 to:
| 1. | prevent deforestation around the world |
| 2. | control the emission of ozone-depleting substances |
| 3. | control the greenhouse gases |
| 4. | prevent hazards from radioactive nuclear wastes |
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What is bad ozone?
1. Ozone formed in the troposphere
2. Ozone found in the lower stratosphere
3. Ozone found in the upper stratosphere
4. Ozone formed in the lab
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UV rays are highly injurious to living organisms as:
1. they are part of invisible electromagnetic spectrum
2. they cannot be stopped by atmospheric gases
3. they are preferentially absorbed by DNA and proteins
4. they cause dissociation of atmospheric oxygen
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The thickness of ozone layer is measured in :
1. Centimorgan (cM)
2. Dobson unit
3. Roentgens
4. Lux
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CFC have a continuing effect on ozone layer as:
| 1. | the Cl atoms formed by them only act as catalysts in reactions causing degradation of ozone |
| 2. | the Cl atoms formed by them are used up in reactions causing degradation of ozone |
| 3. | they are being produced in increasing amounts all over the world |
| 4. | they are efficiently absorbed by the atmospheric water vapours |
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