A renewable exhaustible natural resource is 
(a) coal
(b) petroleum
(c) minerals
(d) forest

Concept Questions :-

Improper Resource Utilisation & Maintenance
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dB is a standard abbreviation used for the quantitative expression of
(a) the density of bacteria in a medium
(b) a particular pollutant
(c) the dominant Bacillus in a culture
(d) a certain pesticide

Concept Questions :-

Air Pollution
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The two gases making highest relative contribution to the greenhouse gases are
(a) CO2 and CH4
(b) CH4 and NO2
(c) CFCs and N20
(d) CO2 and N20

 

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Chipko movement was launched for the protection of
(a) grasslands
(b) forests
(c) liverstock
(d) wet lands

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DDT residues are rapidly passed through food chain causing biomagnification because DDT is :-

(a) lipid soluble
(b) moderately toxic
(c) non-toxic to aquatic animals
(d) water soluble

Concept Questions :-

Water Pollution: I
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Steps taken by the Government of India to control air pollution include
(a) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel
(b) compulsory PUC (Pollution Under Control) certification of petrol driven vehicles, which tests for carbon monoxide and hydrocarbons
(c) permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles
(d) use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks

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Montreal protocol aims at
(a) reduction of ozone depleting substances
(b) biodiversity conservation
(c) control of water pollution
(d) control of CO2 emission

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Biochemical Oxygen Demand (BOD) in a river water
(a) remains unchanged when algal bloom occurs
(b) has no relationship with concentration of oxygen in the water
(c) gives a measure of Salmonella in the water
(d) increases when sewage gets mixed with river water

 

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Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by

(a) Rio de Janeiro Conference
(b) The Montreal Protocol
(c) The Koyoto Protocol
(d) The Vienna Convention

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A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this

(1) Lots of urea and phosphate fertilizer were used in the crops in the vicinity.
(2) The area was sprayed with DDT by an aircraft.
(3) The lake water turned green and stinky.
(4) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.

Which two of above were the main causes of fish mortality in the lake?
(a) 2, 3

(b) 3, 4

(c) 1, 3

(d) 1, 2

Concept Questions :-

Water Pollution: I
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