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The gas responsible for causing Bhopal tragedy was
From among the followings, the major cause of pollution of air big cities
Which of the following is a mode of controlling pollution in big cities
Cleanliness and less use of insecticides
Proper disposal of organic wastes, sewage and industrial effluents
Broder roads and shifting of factories out of the residential areas
All the above.
Spraying of DDT produces pollution of
Air and soil
air and water
Air, water and soil.
Most hazardous metal pollutant of automobile exhaust is
Earth is protected from U.
V. radiations by
Carbon dioxide layer
Domestic waste mostly constitutes
Fluorosis, the bone disease, is caused by the presence of
fluorides in water
pesticides in water
carbon monoxide in air
sulphru dioxide in air.
Water is often treated with chlorine to
Increase oxygen content
Remove insoluble impurities.
Which of the following cause water pollution
Silt and pesticides.
Green chemistry refers to
Chemistry of green pigments
Chemistry of plants
Development of chemical products and processes less harmful to humans
Chemistry of geen house effect.
COD refers to
Catalysed oxidation of diamond
Chemistry of diamonds
Chmical oxygen demand
Catalysed oxidation of dussilved salts.
The region of atmosphere that extends from 50 km 85 km in altitude is called
Oxides os sulphur and nitrogen ae important pollutants of
All the above.
Sewage water is purified by
Phosphate pollution is caused by
Phosphate rocks and sewage
Sewage and agricultural fertilizers.
Weathering of phosphate roks only
Carbon dioxide dissolved in water
Which of the following water pollutants encourage the formation of algae
Photochemical smog is related to pollution if
All of the above.
Water pollution is mainly due to which of the following
BOD refers to
Biological oxygen deficit
Biological oxygen demand of polluted water
Total oxygen demand of biosphere
Disease caused by eating fish found in water contaminated with industrial waste having mercury is
Addition of phosphate and nitrate/fertilizers into water leads to
Increased growth of algae
Increased growth of decomposers
Reduced of algae growth
Which of the following is not a chemical pollutant
The agricultural field that produces maximum methane gas intoatmosphere is
Which one of the following is a source of energy but does not cause pollution
Nuclear power plant
Water pollution is due to
All the above.
Sewage and other wastes
Which of the following does not pertain to biosphere
Ozone layer of stratosphere requires protection from indiscriminate use of
Fungicides, insecticides, bactericides and medicines
Atomic explosions and industrial wastes
Aerosols and high flying jets
The chemical species released by chloroflurocarbons which are harmful to ozone is
Nitrogen dioxide molecules
Chlorine free radicals
Photochemical smog is generally formed
When intensity of solar radiations is very low
around mid day in summer months
When concentration of particulate matter is very low.
in early hours of winters