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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedMediumConceptual

JEE Main 29 June 2022, Shift 2, Chemistry Q74

Question 74 of 90 in this shift, Chemistry question 14 of 30, Section A.

[figure: six-membered ring drawn with alternating double bonds] + CH3CH2CH2Cl\mathrm{CH_3CH_2CH_2Cl} → 'A' Major Product (reagent over the arrow: Anhydrous, AlCl3\mathrm{AlCl_3}) The stable carbocation formed in the above reaction is

The figure, in words

Reaction scheme: six-membered ring drawn with alternating double bonds, plus CH3CH2CH2Cl, arrow labelled Anhydrous, AlCl3, giving 'A' (Major Product).
  1. (1)CH3CH2C⊕H2\mathrm{CH_3CH_2\overset{\oplus}{C}H_2}
  2. (2)CH3C⊕H2\mathrm{CH_3\overset{\oplus}{C}H_2}
  3. (3)CH3−C⊕H−CH3\mathrm{CH_3{-}\overset{\oplus}{C}H{-}CH_3}Official answer
  4. (4)[figure: six-membered ring (drawn with alternating double bonds) bearing a CHCH2CH3\mathrm{CHCH_2CH_3} group in which the CH carbon carries a positive charge (circled plus)]

Official answer

Option 3

NTA final key.

Chapter
Hydrocarbons
Topic
Aromatic Hydrocarbons
Idea tested
Friedel-Crafts Alkylation

Same idea in other shifts

Asked 7× in all
  1. 4 Apr 2026, Shift 2 · Q56Match the LIST-I with LIST-II List-I (Reaction): A. Williamson Synthesis B. Friedel Craft Reaction C. Bromination of vinyl benzene D.…EasyMatch the list
  2. 5 Apr 2026, Shift 1 · Q65For the following Friedel Craft's alkylation reaction, which of the statements are correct? [figure: benzene + n-propyl chloride…MediumOtherHas a figure
  3. 10 Apr 2023, Shift 2 · Q74The major product 'P' formed in the given reaction is:HardDiagram basedHas a figure
  4. 25 Feb 2021, Shift 2 · Q42The major product of the following reaction is : [figure: benzene ring (circle inside hexagon), then an arrow with a skeletal reagent…MediumDiagram basedHas a figure
  5. 8 Jan 2020, Shift 2 · Q50In the following sequence of reactions the maximum number of atoms present in molecule 'C' in one plane is __________.…MediumNumerical value
  6. 4 Sep 2020, Shift 2 · Q45The major product [C] of the following reaction sequence will be :…HardDiagram 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 108 of the 174 JEE Main shifts held from 2017 to 2026.