A) Polluted water has BOD value higher than 10 ppm
B) Aerobic bacteria decrease the BOD value
C) Anaerobic bacteria increase the BOD value
D) Clean water has BOD value higher than 10 ppm
Correct Answer: A
Solution :
Clean water has BOD value less than 5 ppm. Polluted water has BOD value higher than 10 ppm. The option (A) represents correct statement.You need to login to perform this action.
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