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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceTwo statementsEasyConceptual

JEE Main 28 July 2022, Shift 1, Chemistry Q71

Question 71 of 90 in this shift, Chemistry question 11 of 30, Section A.

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 :
  1. (1)Both Statement I and Statement II are true
  2. (2)Both Statement I and Statement II are false
  3. (3)Statement I is true but Statement II is false
  4. (4)Statement I is false but Statement II is trueOfficial answer

Official answer

Option 4

NTA final key (2022 Session 2).

Chapter
Environmental Chemistry
Topic
Environmental Chemistry
Idea tested
BOD Values for Clean vs Polluted Water

Same idea in other shifts

Asked 2× in all
  1. 31 Aug 2021, Shift 1 · Q41BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively as :EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.