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Friday, 9 October

JEE Main Chemistry · Environmental Chemistry

Environmental Chemistry in JEE Main

Environmental Chemistry (Chemistry, Environmental Chemistry) came 16 times in 16 of the 42 JEE Main shifts Lumi analysed, across 9 distinct ideas. 1 of them came in 2024–26; it was last asked in 2024.

Questions
16
in 16 shifts
Ideas asked
9
5 asked more than once
Numerical answer
0
0% of its questions
Pattern
Asked most years
rarely asked since 2024
Questions each year
0241’173’204’213’224’231’240’250’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 11Medium 5Hard 0

Format

  • Single correct9 Q
  • Other4 Q
  • Two statements2 Q
  • Assertion–reason1 Q
Ideas inside the topic
9 ideas
Where it sits

Part of Environmental Chemistry, which had 15 questions in all. Environmental Chemistry accounts for 107% of them. In Lumi's JEE taxonomy it belongs to Inorganic Chemistry.

Some questions sit in other chapters too: Chemistry in Everyday Life.

Every question

All 16 Environmental Chemistry questions

Newest first, each with its options and official answer.

  1. 9 Apr 2024, Shift 1 · Q67The F−\mathrm{F^-} ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much…MediumSingle correct
  2. 6 Apr 2023, Shift 1 · Q71The possibility of photochemical smog formation is more atEasySingle correct
  3. 8 Apr 2023, Shift 2 · Q70Which of these reactions is not a part of breakdown of ozone in stratosphere?MediumSingle correct
  4. 11 Apr 2023, Shift 1 · Q71Given below are two statements: Statement I: If BOD is 4 ppm and dissolved oxygen is 8 ppm, then it is a good quality water. Statement II:…MediumTwo statements
  5. 13 Apr 2023, Shift 2 · Q71Which of the following are the Green house gases? A. Water vapour B. Ozone C. I2\mathrm{I_2} D. Molecular hydrogen Choose the most…EasyOther
  6. 25 Jul 2022, Shift 1 · Q72The photochemical smog does not generally contain :EasySingle correct
  7. 28 Jul 2022, Shift 1 · Q71Given below are two statements : Statement I : In polluted water values of both dissolved oxygen and BOD are very low. Statement II :…EasyTwo statements
  8. 29 Jun 2022, Shift 1 · Q72The acid that is believed to be mainly responsible for the damage of Taj Mahal isEasySingle correct
  9. 3 Aug 2021, Shift 2 · Q41Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Fluoride ion…EasyAssertion–reason
  10. 25 Jul 2021, Shift 1 · Q40Which one of the following chemical agent is not being used for dry-cleaning of clothes ?MediumSingle correct
  11. 16 Mar 2021, Shift 2 · Q40The green house gas/es is (are ) : (A) Carbon dioxide (B) Oxygen (C) Water vapour (D) Methane Choose the most appropriate answer from the…EasyOther
  12. 18 Mar 2021, Shift 1 · Q41The statements that are TRUE : (A) methane leads to both global warming and photochemical smog (B) methane is generated from paddy fields…MediumOther
  13. 8 Jan 2020, Shift 1 · Q38Among the gases (a) - (e), the gases that cause greenhouse effect are : (a) CO2\mathrm{CO_2} (b) H2O\mathrm{H_2O} (c) CFCs (d)…EasyOther
  14. 9 Jan 2020, Shift 2 · Q38Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm) :EasySingle correct
  15. 2 Sep 2020, Shift 1 · Q38The statement that is not true about ozone is :EasySingle correct
  16. 2 Apr 2017 (offline) · Q44A water sample has ppm level concentration of following anions F−=10\mathrm{F^-}=10 ; SO42−=100\mathrm{SO_4^{2-}}=100 ; NO3−=50\mathrm{NO_3^-}=50 The…EasySingle correct