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
Subtopic:  Introduction to Pollution & Types |
 82%
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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
Subtopic:  Introduction to Pollution & Types |
 68%
From NCERT
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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

Subtopic:  Air Pollution |
 91%
From NCERT
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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

Subtopic:  Air Pollution |
 54%
From NCERT
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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

Subtopic:  Air Pollution |
 88%
From NCERT
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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

Subtopic:  Air Pollution |
From NCERT
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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
Subtopic:  Air Pollution |
 77%
From NCERT
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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

Subtopic:  Air Pollution |
 88%
From NCERT
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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

Subtopic:  Air Pollution |
 53%
From NCERT
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Compressed Natural Gas (CNG) is:

1.  Propane 2.  Methane
3.  Ethane 4.  Butane
Subtopic:  Air Pollution |
 61%
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