A common disinfectant used in village wells for disinfection of water

1.	A common disinfectant used in village wells for disinfection of water is __________________?
A.	Free chlorine
B.	Bromine
C.	Iodine
D.	Potassium permanganate
Answer» E.

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A common disinfectant used in village wells for disinfection of water is __________________?

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