Waste Water Engineering

For detecting the nitrates in sewage, the colour may be developed by adding

  • A. Potassium permanganate
  • B. Sulphuric acid and napthamine
  • C. Phenol-di -sulphuric acid and potassium hydroxide
  • D. None of these
Answer: Option C.
Explanation: 

No answer description available for this question.

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