The intensity of noise beyond which physical discomfort is:
1. 70 dB
2. 80 dB
3. 100 dB
4. 120 dB

Subtopic:  Air Pollution |

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The CPCB has recommended zone-wise ambient noise levels. The limit during the day in residential areas is:
1. 75 dB
2. 65 dB
3. 55 dB
4. 50 dB

Subtopic:  Air Pollution |

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Radiatively active gases do not include:
1. Methane

2. Ammonia

3. Nitrous oxide

4. Chloroflouro carbons

Subtopic:  Green House Effect & Global Warming |
 66%
From NCERT

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Identify the incorrect statement regarding CFCs:

1.  They are synthetic gaseous compounds of carbon and halogens
2.  Major sources are the refrigeration industry and industrial solvents
3.  They have been only recently added to the atmosphere - synthesized during the 20th century
4.  They have a short life in the atmosphere - 5 to 12 years
Subtopic:  Ozone Layer Depletion |
 71%

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The group most profoundly affected by global warming normally is:

1. Plants 2. Insects
3. Birds 4. Mammals
Subtopic:  Green House Effect & Global Warming |
 58%

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Which of the following is not a consequence of global warming?

1. a rise in sea levels
2. a change in precipitation patterns
3. an equatorial shift of many species
4. eruption of plant diseases, pests, and weeds

Subtopic:  Green House Effect & Global Warming |

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The concentration of ozone in the stratosphere is normally lowest during the period:
1. February - April

2. May - July

3. July - October

4. November - January

Subtopic:  Ozone Layer Depletion |
 67%

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Which of the following commits the industrialised nations to reduce greenhouse gas emissions?
1. Montreal protocol

2. Kyoto protocol

3. UNECD earth summit

4. Alma Atta conference

Subtopic:  Green House Effect & Global Warming |
 58%

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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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Identify the incorrect statement regarding primary air pollutants:

1.  Carbon monoxide is a product of incomplete combustion of fossil fuels.
2.  Methane is the most abundant hydrocarbon in the atmosphere
3.  A high concentration of sulphur dioxide causes severe respiratory problems
4.  Particulate matter less than 1 micrometer in diameter generally settle out in less than a day.

Subtopic:  Air Pollution |
 73%
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