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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceDiagram basedEasyApplication

JEE Main 8 April 2024, Shift 1, Chemistry Q77

Question 77 of 90 in this shift, Chemistry question 17 of 30, Section A.

Which among the following compounds will undergo fastest SN2\mathrm{S_N2} reaction.

The figure, in words

Options are line-drawn cyclobutane derivatives with a bromoalkyl substituent.
  1. (1)[figure: cyclobutane ring with a methyl group and Br both on the same ring carbon]
  2. (2)[figure: cyclobutane ring bearing a C(CH3)2Br\mathrm{C(CH_3)_2Br} group]
  3. (3)[figure: cyclobutane ring bearing a CH2Br\mathrm{CH_2Br} group]Official answer
  4. (4)[figure: cyclobutane ring bearing a CH(CH3)Br\mathrm{CH(CH_3)Br} group]

Official answer

Option 3

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
SN1 and SN2 Mechanisms
Idea tested
Substrate Steric Effects

Same topic in other shifts

All SN1 and SN2 Mechanisms questions
  1. 2 Apr 2026, Shift 1 · Q64Given below are two statements : Statement (I) : Benzyl chloride reacts faster in SN1\mathrm{S_N1} mechanism than ethyl chloride. Statement…EasyTwo statements
  2. 2 Apr 2026, Shift 2 · Q65Correct statements regarding alkyl halides (R - X) among the following are: A. Alcohol being less polar solvent as compared to water,…MediumSingle correct
  3. 4 Apr 2026, Shift 1 · Q65Match the LIST-I with LIST-II List-I (Name of reaction): A. Finkelstein reaction; B. Swarts reaction; C. Sandmeyer's reaction; D. Fittig…EasyMatch the list
  4. 8 Apr 2026, Shift 2 · Q63The major product of which of the following reaction is not obtained by rearrangement reaction ?MediumDiagram basedHas a figure
  5. 2 Apr 2025, Shift 2 · Q67Match List - I with List - II. List - I (Reaction) (A)…EasyMatch the listHas a figure
  6. 6 Apr 2024, Shift 2 · Q76Chemical reaction: (1-chloropropyl)cyclohexane [cyclohexyl ring attached to CHCl-CH2-CH3] ++ NaOH →H2O\xrightarrow{\mathrm{H_2O}} Major…MediumDiagram basedHas a figure

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.