Pollution is a change in physical, chemical or biological characters of our land and water that may be

(1) Desirable and harmful to human

(2) Desirable and useful to a human

(3) Undesirable and harmful to human

(4) undesirable and useful to a human

Subtopic:  Air Pollution - Greenhouse Effect |
 91%
From NCERT
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Which is the greatest air pollutant these days

(1) Factories

(2) Motor vehicles

(3) Domestic appliances

(4) animals

Subtopic:  Air Pollution - Smog |
 73%
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Removal of the soil by the action of wind and water is known as

(1) Erosion

(2) Fossilization

(3) Leaching

(4) Calcification

Subtopic:  Soil Pollution & Waste Management |
 88%
From NCERT
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Acid rain occurs due to atmospheric pollution of 

(1) SO2

(2) NH3

(3) CO2

(4) N2O

Subtopic:  Air Pollution - Acid Rain |
 91%
From NCERT
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Photochemical smog was first observed in -

(1) London

(2) Los Angeles

(3) Paris

(4) Tokyo

Subtopic:  Air Pollution - Smog |
 62%
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An increase in CO2 concentration in the atmosphere will result in

(1) Adverse effects of natural vegetation

(2) Global warming

(3) Temperature decrease in a global atmosphere

(4) Genetic disorders in plants and animals

Subtopic:  Air Pollution - Global Warming |
 93%
From NCERT
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Domestic waste will lead to : 

1. Biodegradable pollution

2. Nondegradable pollution

3. Thermal pollution of soil

4. Air pollution

Subtopic:  Soil Pollution & Waste Management |
 83%
From NCERT
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The major source of BOD in the river Ganga is 

(1) Leaf litter

(2) Fishes

(3) Human waste

(4) Aquatic plants

Subtopic:  Water Pollution - Biological Oxygen Demand |
 85%
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If a lake is contaminated with DDT, it's highest concentration would be found in :

1. Primary consumer

2. Secondary consumer

3. Tertiary consumer

4. None of the above.

Subtopic:  Water Pollution - Water Pollution & Portable Water |
 81%
From NCERT
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The most harmful air pollutant produced by automobiles is:

1. HNO2

2. NOX

3. SO2

4. CO

Subtopic:  Air Pollution - Global Warming |
 63%
From NCERT
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