Pick out the correct statement ?
A. COD is related to BOD of a given waste in water but the relationship varies for different
B. hromate in cone, sulphuric acid solution at boiling temperature for specified time
C. tes. Typically COD of potable water may be 1-2 mg/litre
D. Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present
E. water
F. COD is determined by oxidising the organic matter present in water with potassium
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