MCQOPTIONS
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| 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. | |