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
← JEE Main 2022 · 26 Jun · Shift 2
ChemistrySingle correct+4 / -1Question 70 of 90
JEE Main 2022 · 26 Jun · Shift 2, Chemistry question 70
Answer and worked solution
Official answer: C
BOD scale. Clean water under about 5 ppm; highly polluted water 17 ppm or more: samples B (18) and C (21).
(C)
Topics:Water and soil pollution