In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S),

distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been

arranged in ascending order ?

1. SE < S < PE < DE

2. SE < PE < S < DE

3. PE < S < SE < DE

4. S< DE < PE < SE

Subtopic:  Water Pollution: I | Water Pollution |
NEET - 2007
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In a coal fired power plant electrostatic precipitators are installed to control emission of:-

1. SO

2. NOx

3. SPM

4. CO

Subtopic:  Air Pollution |
NEET - 2007
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Which one of the following is not a bioindicator of water pollution?

1. Sludge-worms

2. Blood-worms

3. Stone flies

4. Sewage fungus

Subtopic:  Water Pollution: I | Water Pollution |
 51%
NEET - 2007
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The "blue baby' syndrome results from

1. excess of chloride

2. methaemoglobin

3. excess of dissolved oxygen

4. excess of TDS (Total Dissolved Solids)

Subtopic:  Water Pollution: II | Water Pollution |
 70%
NEET - 2006
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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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