Question

The cod values of three water samples a, b and c are 60 ppm, 990 ppm and 120 ppm respectively. The most polluted water sample is: a

Answer 1

The cod values of three water samples a, b and c are 60 ppm, 990 ppm and 120 ppm respectively

Answer 2

$\huge{\mathfrak{\purple{Answer}}}$

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In order to find out BOD, the water sample is first saturated with oxygen. ... The results are expressed in terms of amounts of oxygen in ppm, that would be required to