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Environmental Science

Environmental Science
World's most problematic aquatic weed is

eichornia
azolla
trapa
wolffia

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Environmental Science
The time of day when the relative humidity reaches a maximum value is usually

About midnight
Just before sunrise
At the time when the air temperature is lowest
In the middle of the afternoon
At the time when the air temperature is highest

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Environmental Science
The indoor pollutant radon which is a radioactive gas causes

cardiac arrest
lung cancer
anemia
hormone disorder

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

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

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Environmental Science
The top layer of the lake is called as

Thermonion
Epilimnion
Hypolimnion
Thermocline

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Environmental Science
The unit of total water content of the soil is known as

All of these
Chraserd
Echard
Holard

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MORE MCQ ON Environmental Science

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