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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceOtherEasyConceptual

JEE Main 17 March 2021, Shift 2, Chemistry Q41

Question 41 of 90 in this shift, Chemistry question 11 of 30, Section A.

Which of the following statement(s) is (are) incorrect reason for eutrophication ? (A) excess usage of fertilisers (B) excess usage of detergents (C) dense plant population in water bodies (D) lack of nutrients in water bodies that prevent plant growth Choose the most appropriate answer from the options given below :
  1. (1)(A) only
  2. (2)(B) and (D) only
  3. (3)(C) only
  4. (4)(D) onlyOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Environmental Chemistry
Topic
Environmental Chemistry
Idea tested
Eutrophication and Dissolved Oxygen Limits

Same idea in other shifts

Asked 5× in all
  1. 25 Jun 2022, Shift 1 · Q70The eutrophication of water body results in :EasySingle correct
  2. 22 Jul 2021, Shift 2 · Q41The water having more dissolved O2\mathrm{O_2} is :EasySingle correct
  3. 18 Mar 2021, Shift 2 · Q41Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Statement II :…EasyTwo statements
  4. 5 Sep 2020, Shift 1 · Q39The condition that indicates a polluted environment is :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.