Given below are two statements :
Statement I : In polluted water values of both dissolved oxygen and BOD are very low.
Statement II : Eutrophication results in decrease in the amount of dissolved oxygen.
In the light of the above statements, choose the most appropriate answer from the options given below:
Select the correct option:
A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
Since eutrophication is result of excessive growth of weed in water bodies, which consumes dissolved oxygen of water bodies.
∴ Eutrophication decreases amount of dissolved oxygen in water bodies.
Polluted water has low value of dissolved oxygen, but high value of BOD (Biological oxygen demand), since chemical and organic matter requires dissolved oxygen to get oxidised.
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