_ Which of the following is the most widely used disinfectant in water – McqOptions

MCQOPTIONS

1.	_ Which of the following is the most widely used disinfectant in water treatment?$?
A.	Chlorine
B.	Irradiation of water by ultraviolet light
C.	Cation exchanger
D.	Coagulation
Answer» B. Irradiation of water by ultraviolet light

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