Ozone can be destroyed by a number of free radical catalysts; the most important are:
I. OH-
II. NO-
III. Cl-
IV. Br-

Of these, human activity has drastically increased the levels of:
1. Only III
2. Only III and IV
3. Only I and II
4. I, II, III and IV

Subtopic:  Ozone Layer Depletion |
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Limit of BOD prescribed by Central Pollution Control Board for discharge of industrial and municipalwaste waters into natural surface waters is
1. < 3.0 ppm
2. < 10 ppm
3. < 30 ppm
4. < 100 ppm

Subtopic:  Water Pollution |
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“Greenpeace” is a non-governmental environmental organization with headquarters in:
1. Geneva, Switzerland
2. Paris, France
3. Amsterdam, Netherlands
4. Nuuk, Greenland

Subtopic:  Resource Utilisation & Maintenance |
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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 which one of the following the BOD (Biochemical oxygen demand) of sewage (s), distellary effluent(DE), paper mill effluent (PE) and sugarmill effluent (SE) have been arranged in ascending order.
1. SE < PE < S < DE
2. PE < S < SE < DE
3. S < DE < PE < SE
4. SE < S < PE < DE

Subtopic:  Water Pollution |
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A painful bone condition is produced when the drinking water is contaminated with:
1. Lead
2. Mercury
3. Cadmium
4. Arsenic

Subtopic:  Water Pollution |
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The COP 26 is scheduled to be held in:
1. Brazil
2. Chile
3. Spain
4. United Kingdom

Subtopic:  Resource Utilisation & Maintenance |
From NCERT
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Rachel Carson's famous book "Silent Spring" is related to :
1. Noise pollution
2. Population explosion
3. Ecosystem management
4. Pesticide pollution

Subtopic:  Agrochemical & Radioactive Waste |
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Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with
1. DDT
2. Ammonia
3. CO2
4. Water

Subtopic:  Air Pollution |
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Identify the incorrectly matched pair:

1.

International Day of Forests       

March 21

2.

World Water Day

March 22

3.

Earth Day

May 22

4.

World Environment Day

June 5

Subtopic:  Introduction to Pollution & Types |
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