13. The sample of the waste water was diluted with specifically prepared diluted water with a dilution factor of 150. The dissolved oxygen content in beginning and end of the test were found to be 11 mg/l and 7 mg/l respectively. BOD
will be
(A) 600 mg/l
(B) 6000 mg/l
(C) 60 mg/l
(D) 6 mg/l
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Answer:
a
Explanation:
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