EXAMIANS
Foul odour and bad taste of water is removed by treating with
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Presence of dissolved impurities of __________ is responsible for the red brownish color of water.
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Ozone is
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'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
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Which of the following is a manmade source of air pollution?
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Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
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What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?
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Beyond what concentration of H₂S in air, acute danger to human life exists?
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Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
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The pH value of oxidised sewage is about
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