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 __________.
(i) rich in dissolved oxygen.
(ii) poor in dissolved oxygen.
(iii) highly polluted.
(iv) not suitable for aquatic life.

Answers (1)

The answer is the option (i) Rich in dissolved oxygen

Explanation: BOD refers to the amount of oxygen consumed by microorganism in water. It the value of BOD is less than 5 ppm, then the water is considered to be pure or rich in dissolved oxygen.

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