1.

The following observations were made on 2% dilution of wastewater:Dissolved oxygen of aerated water used for dilution = 0 mg/lDissolved oxygen of diluted sample after 5 days = 0.6 mg/lDissolved oxygen of original sample = 2.0 mg/lThe BOD of 5 days of the sample is:

A. 80 mg/l
B. 60 mg/l
C. 100 mg/l
D. 70 mg/l
Answer» E.


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