Question

Biochemical Oxygen Demand(BOD) value can be a measure of water pollution caused by the organic matter. Which of the following statements is correct?

• 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

Answer 1

The correct option is A Polluted water has BOD value higher than $10$ ppm

Clean water has BOD value less than 5 ppm. Polluted water has BOD value higher than 10 ppm. The option (A) represents correct statement.