JEE Main 2022ChemistryEnvironmental ChemistryWater PollutioneasyMCQ

JEE Main 2022 — Environmental Chemistry Question with Solution

From: JEE Main 2022 (Online) 28th July Morning Shift

Question

Given below are two statements:

Statement I : In polluted water values of both dissolved oxygen and 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 :

Choose an option

Show full solutionCorrect option: D
Correct answer
DStatement I is false but Statement II is true

Step-by-step explanation

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 valueof BOD (Biological oxygen demand), since chemical and organic matter requires dissolved oxygen to get decompose.

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About this question

This is a previous-year question from JEE Main 2022, covering the Environmental Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.