JEE Main · Chemistry · Hydrocarbons
Heat of Hydrogenation
JEE Main asked Heat of Hydrogenation once in the 108 shifts Lumi analysed, on 9 Jan 2020, Shift 1. It belongs to Resonance and Hyperconjugation, in Hydrocarbons (Chemistry).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2020
- the only year
- Pattern
- Gone quiet
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2020. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.
Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.
Shift by shift
Each square is one analysed shift, in date order. Open a filled one for that paper.
How JEE Main framed it
Diagram based is the usual form. Skill tested: conceptual.
- Order of heat of combustion of alkadienes
Difficulty
The question was multiple choice.
Every question
The question
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
Shift: 9 Jan 2020, Shift 1.
Same topic
Other ideas in Resonance and Hyperconjugation
Resonance and Hyperconjugation has 7 ideas JEE Main has asked; 5 of them came up in more than one question.
- Mesomeric Effect9× · 2026
- Huckel's Rule7× · 2023
- Relative Stability4× · 2024
- Hyperconjugation3× · 2026
- Resonance Structures3× · 2021
- Counting Alpha-Hydrogensonce · 2023