JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 29 January 2024, Shift 1, Chemistry Q73

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

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is

(1)resonance energyOfficial answer
(2)ionization energy
(3)hyperconjugation energy
(4)electromeric energy

Official answer

Option 1

NTA final key.

Chapter: Organic Chemistry: Some Basic Principles and Techniques
Topic: Resonance and Hyperconjugation
Idea tested: Relative Stability

Same idea in other shifts

Asked 3× in all

9 Apr 2024, Shift 1 · Q71Relative stability of the contributing structures is : (I) $\mathrm{CH_2=CH-\overset{\ddot{O}:}{\overset{\|}{C}}-H}$ $\longleftrightarrow$ …MediumSingle correctHas a figure
9 Apr 2024, Shift 2 · Q73The correct stability order of the following resonance structures of $\mathrm{CH_3-CH=CH-CHO}$ is I:…MediumSingle correctHas 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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.