World’s worst radioactive pollution was caused by nuclear reactor disaster which
World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air cau
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes
Inhalation of silica dust by human being during hand drilling in mica mining, le
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
The term Biological Oxygen Demand (BOD) is used in relation to
The term Biological Oxygen Demand (BOD) is used in relation to
Persons working in cement plants and limestone quarries are more prone to diseas
Persons working in cement plants and limestone quarries are more prone to disease like
Suspended solid present in the waste water generated in blast furnace gas coolin
Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
Dissolved oxygen content in river water is around __________ ppm.
Dissolved oxygen content in river water is around __________ ppm.
Irradiation of water by ultraviolet light of suitable wavelength is commonly use
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in
Disinfection of water is done to destroy pathogenic bacteria and thus prevent wa
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
Main pollutants released from petroleum refineries is
Main pollutants released from petroleum refineries is
The permissible color for domestic water supply is __________ ppm.
The permissible color for domestic water supply is __________ ppm.