Given below are two statements : Statement I : In polluted …

Chemistry Enviromental Chemistry ( Not In Syllabus ) JEE Main 2022 Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

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

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Text Solution

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The correct answer is:

Since eutrophication is result of excessive growth of weed in water bodies, which consume 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 decompose.

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