JEE Main · Chemistry · Organic Chemistry: Some Basic Principles and Techniques
Calculating Geometrical Isomers in Polyenes
JEE Main asked Calculating Geometrical Isomers in Polyenes once in the 108 shifts Lumi analysed, on 30 Jan 2024, Shift 2. It belongs to Stereoisomerism, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2024
- the only year
- Pattern
- New since 2024
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2024. 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: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 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
Numerical value is the usual form. Skill tested: multi-step.
- Count geometrical isomers of polyene
Difficulty
1 of the 1 question had a numerical answer.
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: 30 Jan 2024, Shift 2.
Same topic
Other ideas in Stereoisomerism
Stereoisomerism has 11 ideas JEE Main has asked; 4 of them came up in more than one question.
- Chiral Centers12× · 2026
- Physical Properties of Geometrical Isomers2× · 2025
- Counting Optical Isomers2× · 2024
- Geometrical Isomerism2× · 2021
- Calculating Total Stereoisomersonce · 2024
- Physical Properties of Cis/Trans Isomersonce · 2024
- Chirality in Substituted Cycloalkanesonce · 2022
- Enantiomeric Excess and Specific Rotationonce · 2022
- Counting Geometrical Isomersonce · 2021
- Geometrical Isomerism in Cycloalkanesonce · 2021