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18/03/2022 8:32 pm
Topic starter
Water sample is reported to be highly polluted if BOD (Biological Oxygen Demand) value of sample becomes
(a) more than 17 ppm.
(b) equal to 10 ppm.
(c) equal to 5 ppm.
(d) less than 5 ppm.
1 Answer
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18/03/2022 8:33 pm
Correct answer: (a) more than 17 ppm.
Explanation:
Water sample is reported to be highly polluted if BOD value of sample is more than 17 ppm.