Brown air consists of:

1. Sulphur dioxide 2. Nitrogen oxides
3. Carbon dioxide 4. Ozone

Subtopic:  Air Pollution |
 59%

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Photochemical smog is formed in traffic congested cities where the conditions are:

1. cool and intense solar radiation            

2. cool and less solar radiation

3. warm and intense solar radiation         

4. warm and less solar radiation

Subtopic:  Air Pollution |
 66%
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Photochemical smog does not contain:
1. Ozone
2. NOx
3. PAN
4. Carbon monoxide

Subtopic:  Air Pollution |
 62%

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Which of the following is not an ill effect of PAN?
1. inhibition of electron transport system in plants
2. damage to chloroplasts in plants
3. acute irritation of eyes in humans
4. leukemia in humans

Subtopic:  Air Pollution |
 62%

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The pH of normal rainwater is:

1. 6.0 to 7.0 2. 6.5 to 7.5
3. 5.6 to 6.5 4. less than 5.5
Subtopic:  Air Pollution |
 52%

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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%
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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%
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Catalytic Converters:

I:  use expensive metals like Gold & Tungsten as catalysts
II:  convert unburnt hydrocarbons to CO2 and H2O, CO to CO2 and NO to N2
III:  are deactivated by Lead

1. only I & II are correct
2. only I & III are correct
3. Only II & III are correct
4. I, II & III are correct

Subtopic:  Air Pollution |
 67%
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A water body has low DO content. An organism that is likely to flourish here will be:
1. Gonyaulax, an annelid
2. Gonyaulax, a nematode
3. Tubifex, an annelid
4. Tubifex, a nematode

Subtopic:  Water Pollution |
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In an algal bloom, the cause of death of other algae is usually:
1. toxins

2. decreased DO

3. decreased sunlight

4. decreased nutrients

Subtopic:  Water Pollution |
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