EXAMIANS
Dissolved oxygen content in river water is around __________ ppm.
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Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.
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Peroxyacyl nitrate (PAN), a pollutant is found in the
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The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
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Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.
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There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
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High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes
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Pick out the wrong statement pertaining to 'green house' for the plants.
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World environment day is observed every year on the 5th of
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Which of the following fine dust removal equipments is the most efficient?
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