Presence of H2S in raw water (to be chlorinated) results in the_____________________?
Correct answer: C. Increased dosage of chlorine to provide a disinfecting residual in the water
- A. Reduced softening capacity of zeolite
- B. Easy removal of its hardness
- C. Increased dosage of chlorine to provide a disinfecting residual in the water
- D. None of these
Explanation
Hydrogen sulfide consumes chlorine through oxidation reactions, creating additional chlorine demand before a disinfecting residual can remain. Hence a higher chlorine dose is required.
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