Chlorine usage in the treatment of 25,000 m3/day of water has been 9 kg/day.The residual chlorine after 10 minutes of contact is 0.2 mg/l. The chlorine demand of water would be nearly

Chlorine usage in the treatment of 25,000 m3/day of water has been 9 k

1.	Chlorine usage in the treatment of 25,000 m3/day of water has been 9 kg/day.The residual chlorine after 10 minutes of contact is 0.2 mg/l. The chlorine demand of water would be nearly
A.	0.28 mg/l
B.	0.22 mg/l
C.	0.16 mg/l
D.	0.12 mg/l
Answer» D. 0.12 mg/l

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Chlorine usage in the treatment of 25,000 m3/day of water has been 9 kg/day.The residual chlorine after 10 minutes of contact is 0.2 mg/l. The chlorine demand of water would be nearly

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