The maximum recommended level of residual chlorine into the drinking water is for 1 hourThe maximum recommended level of residual chlorine into the drinking water is for 1 hour mcq  given below:

Q. The maximum recommended level of residual chlorine into the drinking water is for 1 hour

(a) 0.2 mg/L
(b) 0.5 mg/L
(c) 1.0 mg/L
(d) 2.0 mg/L

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Ans:(b) 0.5 mg/L  
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