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What should be the amount of BOD in the drinking water?(a) More than 1 ppm(b) Less than 1 ppm(c) 5 ppm(d) 10 ppmI had been asked this question at a job interview.My question is based upon Environmental Issues topic in portion Environmental Issues of Biology – Class 12

Answer»

Correct ANSWER is (b) Less than 1 PPM

Explanation: The amount of biological oxygen demand in pure drinking water should be less than 1 ppm. Less amount of BOD means more amount of dissolved oxygen (DO) is present in water. This DO is ESSENTIAL for the proper GROWTH of ORGANISMS.



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