1.

When chlorinating water there is a point when the chlorine requirement of the water is met. Such a point is called-1. Break Point Chlorination2. Super Chlorination3. Contact Period4. Chlorine Requirement

Answer» Correct Answer - Option 1 : Break Point Chlorination

Concept:-

Breakpoint chlorination:-

  • Breakpoint chlorination is a term that gives us an idea of the extent of chlorine added to water.
  • In fact, it represents that much dose of chlorination, beyond which any further additional chlorine will appear as free residual chlorine.
  • In general practice, chlorine is added beyond breakpoint to ensure a residual of 0.2 - 0.3 mg/l as free chlorine. This residual chlorine takes care of future recontamination.

  • When excess chlorine ( 5 to 15 mg/l ) is added during an epidemic such that it gives a residual of 1 to 2 mg/l beyond breakpoint is called super chlorination.


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