Quiz questions on Water Pollution:
High coliform count in water is an indicator of
(a) Industrial pollution
(b) Sewage contamination
(c) Hardness of water
(d) Oil pollution
Crystals of potassium permanganate are added to water because it is:
(a) Pollutant
(b) Germicide
(c) Pesticide
(d) Purifier
__ is used to check water pollution caused by industrial affluents
(a) Water Hyacinth
(b) Parthenium
(c) Elephant Grass
(d) All of these
Which of the following is the leading cause of death and diseases worldwide?
(a) water pollution
(b) radioactive pollution
(c) air pollution
(d) soil pollution
The high amount of E. coli in water is the indicator of
(a) Hardness of water
(b) Industrial pollution
(c) Sewage pollution
(d) Presence of chlorine in water
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One of the following is the chief source of water and soil pollution
(a) Agro industry
(b) Mining
(c) Thermal power stations
(d) All of these
Which of the following is biodegradable pollutants?
(a) Sewage
(b) Plastic
(c) Polythene
(d) DDT
The most common indicator organisms that represent polluted waters is
(a) E. Coli
(b) S. Typhi
(c) C. Vibrio
(d) Entamoeba
B.O.D. test or biological oxygen demand test is made for measuring
(a) Air pollution
(b)Water pollution
(c) Noise pollution
(d) Soil pollution
Water pollution
(a) Increases oxygenation
(b) Decreases turbidity
(c) Increases turbidity and deoxygenation
(d) Increases photosynthesis
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Polluted water can be purified by using
(a) Micro-organisms
(b) Algae
(c) Pesticides
(d) Fishes
Biological Oxygen Demand (BOD) is a measure of
(a) Industrial waste poured into water bodies
(b) Extent to which water is polluted with organic compounds
(c) Amount of carbon monoxide inseparably combined with haemoglobin
(d) Amount of oxygen needed by green plants during night
What is the full form of BOD?
(a) Biological Ozone Demand
(b) Biological Oxygen Demand
(c) Biotic Oxygen Demand
(d) Biological Oxygen Deficiency
Which of the following is a water polluting factor?
(a) Smoke
(b) Industrial waste
(c) Detergent
(d) Ammonia
Which of the following is a main factor of water pollution?
(a) Commercial production
(b) Windmill
(c) Smoke and ammonia
(d) Detergents
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Sewage water can be purified for recycling by the action of
(a) Aquatic plants
(b) Penicillin
(c) Micro-organisms
(d) Fishes
Who was the first to recognize the problem of water pollution ?
(a) Airstotle
(b) Theophrastus
(c) Hippocrates
(d) Thales
The BOD removal in an oxidation pond may be up to
(a) 100%
(b) 97%
(c) 94%
(d) 90%
Thermal pollution of water bodies is due to
(a) Discharge of heat (hot water) from power plants
(b) Discharge of chemicals from industries
(c) Discharge of waste from mining
(d) Discharges of agricultural run off
Water pollution is caused due to
(a) Sewage and other waste
(b) Industrial effluents
(c) Agricultural discharges
(d) All of these
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In the treatment of waste water discharge, the treatment stage involves biological treatment.
(a) Primary treatment
(b) Secondary treatment
(c) Tertiary treatment
(d) Reverse osmosis stage
Water pollution can be stopped best by
(a) Treating effluents to remove injurious chemicals
(b) Rearing more fish
(c) Cultivating useful water plants
(d) Spraying with DDT
When Chloride is added to sewage both at the beginning as well as at the end of the treatment process, the phenomenon is called:
(a) Post chlorination
(b) Super chlorination
(c) Split chlorination
(d) None of these
The main cause of water pollution is
(a) Soap
(b) Industrial effluents
(c) Smoke
(d) Ammonia
Minamata disease is a pollution related disease resulting from
(a) Oil spills into the sea
(b) Accumulation of arsenic into atmosphere
(c) Release of industrial waste mercury into fishing water
(d) Release human organic waste into drinking water
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The excessive discharge of fertilizers into the water bodies results in
(a) Growth of fish
(b) Death of hydrophytes
(c) Eutrophication
(d) Silt
Which of the following does not occur when the sewage is discharged into water?
(a) Increase in O2
(b) Cyanophycean blooms occur
(c) Depletion of O2 layers
(d) Eutrophication
Who is responsible for pollution of water?
(a) Oil refineries
(b) Paper factories
(c) Sugar mills
(d) All
Fish die by sewage because
(a) Of its bad smell
(b) It replaces the food equipment of fish
(c) It increases oxygen competition among fishes
(d) CO2 is mixed in large amounts in water
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Water pollution is caused by
(a) Ammonia
(b) Phytoplankton
(c) Industrial effluents
(d) Smoke
Which of the following metals is a water pollutant and causes sterility in human beings?
(a) As
(b) Mn
(c) Mg
(d) Hg
Water pollution can be identified by testing its
(a) PH level
(b) Biological Oxygen Demand (BOD)
(c) Both (a) and (b)
(d) None of these
Which regions of seas/oceans are the most polluted ?
(a) Estuarine
(b) Coastal
(c) Sea depths
(d) Coral reefs
A sewage treatment process, in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process, is called __ treatment.
(a) Cyclic
(b) Primary
(c) Activated sludge
(d) Tertiary
