Which regions of seas/oceans are the most polluted ?
Q. Which regions of seas/oceans are the most polluted ? Estuarine Coastal Sea depths Coral reefs Answer: Coastal
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water pollution mcqs
Which of the following does not occur when the sewage is discharged into water?
Q. Which of the following does not occur when the sewage is discharged into water? Increase in O2 Cyanophycean blooms occur Depletion of O2 layers Eutrophication Answer: Increase in O2
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Fishes die by sewage because
Q. Fishes die by sewage because Of its bad smell It replaces food material of fishes It increases oxygen competition among fishes CO2 is mixed in large amount in water Answer: Of its bad smell
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Foul smell in the water of tanks, ponds etc. is due to
Q. Foul smell in the water of tanks, ponds etc. is due to Anaerobiosis Aerobiosis Biological magnification Psammophytes Answer: Anaerobiosis
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Minamata disease is a pollution related disease results from
Q. Minamata disease is a pollution related disease results from Oil spills into sea Accumulation of arsenic into atmosphere Release of industrial waste mercury into fishing water Release human organic waste into drinking water Answer: Release of industrial waste mercury into fishing water
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The excessive discharge of fertilizers into water bodies results in
Q. The excessive discharge of fertilizers into water bodies results in Growth of fish Death of hydrophytes Eutrophication Silt Answer: Eutrophication
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Water pollution can be stopped best by
Q. Water pollution can be stopped best by Treating effluents to remove injurious chemicals Rearing more fishes Cultivating useful water plants Spraying with DDT Answer: Treating effluents to remove injurious chemicals
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When Chloride is added to sewage both at the beginning as well as at the end of the treatment process, the phenomenon is called
Q. When Chloride is added to sewage both at the beginning as well as at the end of the treatment process, the phenomenon is called: Post chlorination Super chlorination Split chlorination None of these Answer: Split chlorination
In the treatment of waste water discharge, which treatment stage involves biological treatment
Q. In the treatment of waste water discharge, which treatment stage involves biological treatment Primary treatment Secondary treatment Tertiary treatment Reverse osmosis stage Answer: Secondary treatment
Thermal pollution of water bodies is due to
Q. Thermal pollution of water bodies is due to Discharge of heat (hot water) from power plants Discharge of chemicals from industries Discharge of waste from mining Discharges of agricultural run off Answer: Discharge of heat (hot water) from power plants
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