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Environmental Science

Environmental Science
World's most problematic aquatic weed is

trapa
wolffia
eichornia
azolla

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Environmental Science
Percentage of forest area recommended by the the national forest policy for plains is

0.3
0.67
0.1
0.33

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Environmental Science
The darkening of the skin due to arsenic poisoning is called

None of these
Skin scaling
Diffuse melanosis
Black syndrome

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Environmental Science
A high Biological Oxygen Demand (BOD) indicates that:

Low level of microbial pollution
High level of microbial pollution
absence of microbial action
water is pure

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Environmental Science
In the stratosphere, the air temperature normally:

Increases with increasing height
Cannot be measured
Both increases and decreases depending on the season
Decreases with increasing height

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Environmental Science
Earth summit was held in

Stockholm in 1972
New York in 1972
Paris in 1992
Rio de Jeneiro in 1992

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MORE MCQ ON Environmental Science

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