Civil Engineering - GATE Exam Questions - Discussion

Discussion Forum : GATE Exam Questions - Section 4 (Q.No. 30)
Chemical oxygen Demand (COD) of a sample is always greater than Biochemical Oxygen Demand (BOD) since it represents :
biodegradable organic matter only
biodegradable and non-biodegradable organic matter
non-biodegradable organic matter
inorganic matter
Answer: Option
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