A. Chlorine
B. Irradiation of water by ultraviolet light
C. Cation exchanger
D. Coagulation
Related Mcqs:
- The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?
A. Chlorine
B. Alkalis
C. Benzene hexachloride
D. Alkyl benzene sulphonate (ABS) - Which is the most widely used coagulant for the treatment of turbid water ?
A. Alum (aluminium sulphate)
B. Lime
C. Ferric chloride
D. Sodium aluminate - During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?
A. Filtration
B. Digestion
C. Sedimentation
D. Both B. and C. - In water treatment plant, zeolite process is used to remove the _____________ of water?
A. Acidity
B. Alkalinity
C. Hardness
D. Iron & zinc - The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated?
A. Decreases
B. Increases
C. Remain constant
D. May increase or decrease; depends on the chemical characteristics of polluted water - The most commonly used chemical coagulant in water treatment is________________?
A. Ferrous sulphate
B. Alum
C. Lime
D. Hydrazine - In water treatment, alum [Al2(SO4)3] is used for the process of __________________?
A. Filtration
B. Coagulation
C. Sedimentation
D. Disinfection - Tri-sodium phosphate is used in boiler water treatment to reduce____________________?
A. Turbidity
B. Caustic embrittlement
C. Suspended silica
D. Dissolved oxygen - 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_________________?
A. Ozone and iodine
B. Chlorine or its compounds
C. Ultraviolet light for irradiation of water
D. All A., B. & C. - Which of the following processes is involved in the biochemical treatment of sewage effluents ?
A. Oxidation
B. Reduction
C. Dehydration
D. Fermentation
