Environmental Chemistry - Result Question 19
####19. Water filled in two glasses $A$ and $B$ have BOD values of 10 and 20 , respectively. The correct statement regarding them, is
(2019 Main, 10 Jan I)
(a) $A$ is more polluted than $B$ (b) $A$ is suitable for drinking, wherease $B$ is not
(c) Both $A$ and $B$ are suitable for drinking
(d) $B$ is more polluted than $A$
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Answer:
Correct Answer: 19. (c)
Solution:
- BOD is defined as the amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water. Clean water or drinking water has a BOD value $<5 ppm$.
So, water filled with $A, BOD=10 ppm$ is polluted and water filled with $B, BOD=20 ppm$, is also polluted. But, $B$ is more polluted than $A$.
