How much bleaching powder is needed to chlorinate 5000 l of water whos – McqOptions

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1.	How much bleaching powder is needed to chlorinate 5000 l of water whose chlorine demand is 2 mg/l, assuming that the bleaching powder has 25% available chlorine?
A.	4 g
B.	40 g
C.	140 g
D.	400 g
Answer» C. 140 g

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