Biochemical Oxygen Demand,


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.


Option (i) rich in dissolved oxygen  is the answer.

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