Which one of the following is the correct percentage of the two (out of the total of 4) green-house gases that contribute to the total global warming?

1. CFCs 14%, CH4 20%

2. CO2 40%, CFCs 30%

3. N2O 6%, CO2 86%

4. CH4 20%, N2O 18%

Subtopic:  Green House Effect & Global Warming |
 79%
From NCERT
NEET - 2008
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Which one of the following statements is correct?

1. Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies

2. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants

3. Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil

4. At present, it is not possible to grow maize without chemical fertilizers

Subtopic:  Water Pollution: I | Water Pollution |
 76%
From NCERT
NEET - 2007
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Which one of the following is being utilized as a source of bio- diesel in the Indian

countryside?

1. Euphorbia

2. Beetroot

3. Sugarcane

4. Pongamia

Subtopic:  Resource Utilisation & Maintenance |
 58%
NEET - 2007
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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 |
 89%
From NCERT
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