If 2% solution of a sewage sample is incubated for 5 days at 20°C and – McqOptions

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1.	If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
A.	00 ppm
B.	25 ppm
C.	50 ppm
D.	one of these
Answer» D. one of these

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