Montreal protocol which calls for appropriate action to protect the ozone layer from

human activities was passed in the year:

1. 1986

2. 1987

3. 1988

4. 1985

Subtopic:  Ozone Layer Depletion |
 79%
From NCERT
NEET - 2006
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Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial

and municipal waste water into natural surface water, is

1. < 3.0 ppm

2. < 10 ppm

3. < 100 ppm

4. < 30 ppm

Subtopic:  Water Pollution: I | Water Pollution |
NEET - 2006
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Checking of re-radiating heat by atmospheric CO2 methane, ozone, dust is known as 

1. green house effect

2. radioactive effect

3. ozone layer

4. solar effect.

Subtopic:  Green House Effect & Global Warming |
 88%
From NCERT
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Chronic exposure to arsenic causes ?

1. blue-baby syndrome

2. foot and mouth disease

3. dropsy

4. itai-itai disease

Subtopic:  Water Pollution: II | Water Pollution |
 64%
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Green muffler is used against which type of pollution ?

1. Air

2. Water

3. Soil

4. Noise

Subtopic:  Air Pollution |
 64%
AIIMS - 2002
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Biochemical Oxygen Demand (BOD) is a measure of

1. industrial wastes poured into water bodies

2. extent to which water is polluted with organic compounds 

3. amount of carbon monoxide inseparably

4. amount of oxygen needed by green plants during night.

Subtopic:  Water Pollution: I | Water Pollution |
 82%
From NCERT
AIIMS - 2003
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Drinking of mineral water with very low level of pesticides (about 0.02 ppm) for long

periods may :-

1. produce immunity against mosquito

2. cause leukemia (blood cancer) in most people

3. cause cancer of the intestine

4. lead to accumulation of pesticide residues in body fat

Subtopic:  Water Pollution: I | Water Pollution |
 71%
AIIMS - 2003
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Photochemical smog formed in congested metropolitan cities mainly consists of

1. ozone, peroxyacetyl nitrate and NOx

2. smoke, peroxyacetyl nitrate and SO2

3. hydrocarbons, SO2 and CO2

4. hydrocarbons, ozone and SOx.

Subtopic:  Air Pollution |
 65%
AIIMS - 2003
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In almost all Indian metropolitan citiies like Delhi, the major atmospheric pollutant(s)

is/are:

1. suspended particular matter (SPM)

2. oxides of suplhur

3. carbon dioxide and carbon monoxide

4. oxides of nitrogen.

Subtopic:  Air Pollution |
 62%
AIIMS - 2003
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A lake with an inflow of domestic sewage rich in organic waste may result in 

1. drying of the lake very soon due to algal bloom

2. an increased production of fish due to lot of nutreients

3. death of fish due to lack of oxygen

4. increased population of aquatic food web organisms.

Subtopic:  Water Pollution: I | Water Pollution |
 86%
From NCERT
AIIMS - 2004
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