Question
Chemistry Question on Environmental Chemistry
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
A
A and B
B
A and D
C
B and C
D
B and D
Answer
B and C
Explanation
Solution
The correct answer is (C) : B and C
Highly polluted water should have BOD value of 17 ppm or more.