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Question
Pick out the correct statement ?
Options:
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 f
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 A., B. and C.
Answer: Option D
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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