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