Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).
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Inhalation of silica dust causes a disease called
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White smoke coming out of the chimney of a furnace indicates the use of
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Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?
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Ethanolamine is an absorbant used for the removal of __________ from air/gas.
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__________ substances present in sewage are removed in grit chamber during sewage treatment.
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H2S present in gaseous stream can be removed by adsorption on
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Presence of soluble organics in polluted water causes
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High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes
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TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
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Persons working in cement plants and limestone quarries are more prone to disease like
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Dissolved oxygen content in river water is around __________ ppm.
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Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
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The permissible color for domestic water supply is __________ ppm.
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Reingleman chart is used for the evaluation of __________ pollution.
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Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
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The Killer gas which caused Bhopal gas tragedy in 1984 was
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A shallow pond in which the sewage is retained and biologically treated is called
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From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
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Q100
Open questionNoise pollution level in a chemical plant is expressed in
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