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Q.

Biochemical oxygen demand (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be

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a

rich in dissolved oxygen

b

poor in dissolved oxygen

c

highly polluted

d

not suitable for aquatic life

answer is A.

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Detailed Solution

Biochemical oxygen demand (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be rich in dissolved oxygen.

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