Related Questions

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 of the above
Removal of __________ results from the disinfection of water.
A Turbidity
B Odour
C Hardness
D Bacteria
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)
Dose of chlorine for disinfection of water is about __________ mg/litre of water.
A 0.01
B 0.1
C 0.3
D 1
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in
A Food industry
B Municipal sewage treatment
C Petroleum refinery
D Iron & steel plant
The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?
A 39
B 78
C 117
D 156
The suitable method for disinfection of swimming pool water is
A Ultra violet rays treatment
B Lime treatment
C By using potassium permanganate
D Chlorination
Disinfection of drinking water, is done to remove
A odour
B bacterias
C turbidity
D colour
The amount of chlorine available in water after disinfection is called as
A Free chlorine
B Residual chlorine
C Free available chlorine
D Combined available chlorine
A common disinfectant used in village wells for disinfection of water is
A Free chlorine
B Bromine
C Iodine
D Potassium permanganate

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