Q. No.A substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource is called:
| 1. | Pathogen | 2. | Allergen |
| 3. | Pollutant | 4. | Secondary metabolite |
The Environment [protection] Act to protect and improve the quality of our environment [Air, Water and Soil] was passed by the Government of India in:
| 1. | 1974 | 2. | 1981 |
| 3. | 1986 | 4. | 1988 |
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The most effective device to remove particulate matter from polluted air is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
4. scrubber
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The device, normally used to remove gaseous pollutants from polluted air but can remove large particulate matter as well, is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
4. Scrubber
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According to CPCB, what particulate size is most harmful to humans:
1. more than 10 micrometers
2. between 5 to 10 micrometers
3. between 2.5 and 5 micrometers
4. less than 2.5 micrometers
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Modern catalytic converters in automobiles are capable of:
| I: | Oxidation of carbon, hydrocarbons, and carbon monoxide to carbon dioxide |
| II: | Oxidation of nitrogen oxides to nitrogen (N2) |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
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It is necessary to remove sulphur from petroleum products to
| 1. | reduce the emission of sulphur dioxide in exhaust fumes |
| 2. | increase efficiency of automobiles' engines |
| 3. | use sulphur removed from petroleum for commercial purposes |
| 4. | increase the life span of engine silencers |
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What was added in 1987 as a pollutant to The Air (Prevention and Control of Pollution) Act, [originally passed in 1981]?
1. radioactive wastes
2. CFCs
3. ground level ozone
4. noise
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Which of the following statements is not true regarding CNG?
1. It is non-polluting
2. It burns more efficiently than petrol and diesel
3. It cannot be siphoned off by thieves
4. It cannot be adulterated
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