R

Rakesh Kumar • 28.44K Points
Instructor II

Q. The maximum permissible chlorine content for public supplies should be between ?

  • (A) 0.1 to 0.2 ppm
  • (B) 0.3 to 0.4 ppm
  • (C) 1.2 to 4 ppm
  • (D) 6.5 to 8 ppm
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