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Saturday, 31 October

JEE Main · Chemistry · Environmental Chemistry

Eutrophication and Dissolved Oxygen Limits

JEE Main asked Eutrophication and Dissolved Oxygen Limits 5 times in 5 of the 108 shifts Lumi analysed, in 2020, 2021 and 2022. It belongs to Environmental Chemistry (Chemistry). The longest wait between two years asking it was 1 year. In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
3 of 8
First asked
2020
last in 2022
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021 and 2022. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200.10’210.03’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 3 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20221 of 24
  • 20213 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: conceptual.

  • Consequence of eutrophication
  • Water with more dissolved oxygen

Difficulty

Easy 5Medium 0Hard 0

Every question was multiple choice.

Every question

All 5 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 25 Jun 2022, Shift 1 · Q70The eutrophication of water body results in :EasySingle correct
  2. 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
  3. 17 Mar 2021, Shift 2 · Q41Which of the following statement(s) is (are) incorrect reason for eutrophication ? (A) excess usage of fertilisers (B) excess usage of…EasyOther
  4. 22 Jul 2021, Shift 2 · Q41The water having more dissolved O2\mathrm{O_2} is :EasySingle correct
  5. 5 Sep 2020, Shift 1 · Q39The condition that indicates a polluted environment is :EasySingle correct

Shifts: 5 Sep 2020, Shift 1, 17 Mar 2021, Shift 2, 18 Mar 2021, Shift 2, 22 Jul 2021, Shift 2, 25 Jun 2022, Shift 1.

Same topic

Other ideas in Environmental Chemistry

Environmental Chemistry has 19 ideas JEE Main has asked; 15 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas