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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedMediumConceptual

JEE Main 26 June 2022, Shift 1, Chemistry Q76

Question 76 of 90 in this shift, Chemistry question 16 of 30, Section A.

Which will have the highest enol content ?

The figure, in words

Options are drawn six-membered rings carrying C=O groups as described.
  1. (1)[structure: six-membered carbon ring with two C=O groups on adjacent ring carbons]
  2. (2)[structure: six-membered carbon ring with two C=O groups on ring carbons separated by one ring carbon]
  3. (3)[structure: six-membered carbon ring with three C=O groups on alternate ring carbons]Official answer
  4. (4)[structure: six-membered carbon ring with two C=O groups on opposite ring carbons]

Official answer

Option 3

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Structural Isomerism
Idea tested
Enol Content Stability Factors

Same topic in other shifts

All Structural Isomerism questions
  1. 2 Apr 2026, Shift 1 · Q72Consider the isomers of hydrocarbon with molecular formula C5H10\mathrm{C_5H_{10}}. These isomers do not decolourise KMnO4\mathrm{KMnO_4}…HardNumerical value
  2. 5 Apr 2026, Shift 2 · Q64Identify the correct IUPAC name of hydrocarbon (xx) containing three primary carbon atoms and with molar mass 72 g mol−1^{-1}.EasySingle correct
  3. 6 Apr 2026, Shift 1 · Q64Given below are two statements: Statement I: 2,6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers. Statement II:…MediumTwo statements
  4. 3 Apr 2025, Shift 1 · Q64Identify the correct statements from the following. A. [structure: pentan-3-one (skeletal, C=O at the middle carbon)] and [structure:…MediumOtherHas a figure
  5. 3 Apr 2025, Shift 2 · Q75The total number of structural isomers possible for the substituted benzene derivatives with the molecular formula C9H12\mathrm{C_9H_{12}} is…MediumNumerical value
  6. 4 Apr 2024, Shift 1 · Q76Identify (B) and (C) and how are (A) and (C) related ? (A) = 1-bromo-4-(2-bromoethyl)benzene drawn as 4-Br-C6H4-CH2CH2Br;…MediumOtherHas 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.