alleryUnder identical BOD test conditions, samples P, Q and R give 8, 20 and 400 mg/L. Which has the greatest organic pollution?
AP
BR
CQ
DP and Q equally
Answer & Solution
Correct answer: B. R
Higher BOD indicates more oxygen demand from microbial oxidation of organic matter. Since 400 > 20 > 8 mg/L, R has the greatest organic pollution.
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