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Friday, 9 October

JEE Main 2017 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 2 April 2017 (offline), Chemistry Q54

Question 54 of 90 in this shift, Chemistry question 24 of 30.

Which of the following molecules is least resonance stabilized ?

The figure, in words

Four ring structures: pyridine, 4,4-dimethylcyclohexa-2,5-dienone, benzene, furan.
  1. (1)[structure: pyridine]
  2. (2)[structure: 4,4-dimethylcyclohexa-2,5-dien-1-one (ring with C=O and gem-dimethyl)]Official answer
  3. (3)[structure: benzene]
  4. (4)[structure: furan]

Official answer

Option 2

CBSE answer key (25/04/2017, used for result).

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
Resonance and Hyperconjugation
Idea tested
Huckel's Rule

Same topic in other shifts

All Resonance and Hyperconjugation questions
  1. 2 Apr 2026, Shift 2 · Q63Given below are two statements: Statement I: In…MediumSingle correct
  2. 5 Apr 2026, Shift 2 · Q63IUPAC name of the some alkenes are given below. Find out the correct stability order. A. 2-Methylbut-2-ene B. ciscis-But-2-ene C. 2,…MediumSingle correct
  3. 6 Apr 2026, Shift 2 · Q63Shown below is the structure of methyl acetate with three different α\alpha, β\beta and γ\gamma carbon - oxygen bonds. The correct…MediumDiagram basedHas a figure
  4. 3 Apr 2025, Shift 2 · Q65Given below are two statements: Statement I : Hyperconjugation is not a permanent effect. Statement II : In general, greater the number of…EasyTwo statements
  5. 6 Apr 2024, Shift 2 · Q88Number of carbocations from the following that are not stabilized by hyperconjugation is ________.MediumNumerical valueHas a figure
  6. 9 Apr 2024, Shift 1 · Q71Relative stability of the contributing structures is : (I) CH2=CH−C∥O¨:−H\mathrm{CH_2=CH-\overset{\ddot{O}:}{\overset{\|}{C}}-H} ⟷\longleftrightarrow…MediumSingle correctHas a figure

Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); 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.