Jee Main
Environmental Chemistry
JEE Main 2022 (Online) 26th June Evening Shift
MCQ+4 / -12022
The measured BOD values for four different water samples (A-D) are as follows: A = 3 ppm; B = 18 ppm; C = 21 ppm; D = 4 ppm. The water samples which can be called as highly polluted with organic wastes, are :