How much bleaching powder is needed to chlorinate 5000l of w

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Civil Engineering

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M: +1.00/-0.33

How much bleaching powder is needed to chlorinate 5000l of water whose chlorine demand is 2 mg/l, assuming that the bleaching powder has 25% available chlorine?

[ESE (IES) CE 2016 P2]

A 4 g

B 40 g

C 140 g

D 400 g