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.
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.
Option 1 -
Both Statement I and Statement II are true.
Option 2 -
Both Statement I and Statement II are false.
Option 3 -
Statement I is true but Statement II is false.
Option 4 -
Statement I is false but Statement II is true.
-
1 Answer
-
Correct Option - 4
Detailed Solution:(a) Polluted water has low value of dissolved oxygen, but high value of B.O.D., because chemical and organic matter uses dissolved oxygen to decompose.
(b) Eutrophication is result of excessive growth of weed in water bodies, which consumes dissolved oxygen, thus decreases oxygen.
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