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Biochemical oxygen demand (BOD) value can be a measure of water pollution caused by the organic matter. Which of the fol…

Q1

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 decreases the BOD value

c

Anaerobic bacteria increases the BOD value

d

Clean water has BOD value higher than 10 ppm

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