Environmental Engineering in CE

Pick out the correct statement.

  • A. Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water
  • B. COD is determined by oxidising the organic matter present in water with potassium dichromate in cone, sulphuric acid solution at boiling temperature for specified time
  • C. COD is related to BOD of a given waste in water but the relationship varies for different wastes. Typically COD of potable water may be 1-2 mg/litre
  • D. All of the above
Answer: Option D.
Explanation: 

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