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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedHardConceptual

JEE Main 24 June 2022, Shift 2, Chemistry Q73

Question 73 of 90 in this shift, Chemistry question 13 of 30, Section A.

Arrange the following carbocations in decreasing order of stability.

The figure, in words

Three five-membered rings labelled A, B, C, each drawn with a circled plus charge. A: all-carbon five-membered ring (no heteroatom shown) with the circled + on the top ring vertex. B: five-membered ring with an O atom drawn as a small open circle at the top-right ring vertex; the circled + sits on the adjacent ring vertex to its right. C: five-membered ring with an O drawn as a small open circle at the top-right ring vertex; the circled + sits on the lower-right ring vertex.
  1. (1)A > C > B
  2. (2)A > B > COfficial answer
  3. (3)C > B > A
  4. (4)C > A > B

Official answer

Option 2

NTA final key.

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
Inductive and Electromeric Effects
Idea tested
Carbocation Stability

Same idea in other shifts

Asked 4× in all
  1. 4 Apr 2025, Shift 2 · Q63In which pairs, the first ion is more stable than the second ? (A) [figure: 1-methoxycyclohexyl cation] & [figure: 1-methylcyclohexyl…MediumOtherHas a figure
  2. 30 Jan 2024, Shift 2 · Q73The correct stability order of carbocations isEasySingle correct
  3. 10 Apr 2023, Shift 2 · Q73The decreasing order of hydride affinity for following carbocations is: A. CH2=CH−C+(CH3)−CH3\mathrm{CH_2=CH-\overset{+}{C}(CH_3)-CH_3} (carbocation…HardOtherHas 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.