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Social & Preventive Medicine Environment and health 73a532f1

The minimum recommended concentration of free chlorine in drinking water at the end of one hour (mg/L) is -

A

0.1

B

0.5

C

1

D

1.5

High-Yield Explanation

The minimum recommended amount of residual chlorine is 0.5 mg/L. Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 774

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