JEE Main · Chemistry · Organic Chemistry: Some Basic Principles and Techniques
Isomer Counting in Benzene Derivatives
JEE Main asked Isomer Counting in Benzene Derivatives once in the 108 shifts Lumi analysed, on 3 Apr 2025, Shift 2. It belongs to Structural Isomerism, 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
- 2025
- the only year
- Pattern
- New since 2024
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2025. 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: 0 in 18 shifts · 2025: 1 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: application.
- Count structural isomers of formula
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: 3 Apr 2025, Shift 2.
Same topic
Other ideas in Structural Isomerism
Structural Isomerism has 9 ideas JEE Main has asked; 2 of them came up in more than one question.
- Enumeration of Structural Isomers5× · 2026
- Metamerism3× · 2026
- Chain Isomerismonce · 2026
- Aromaticity-Driven Enolizationonce · 2024
- Chain vs Position Priority Resolutiononce · 2024
- Position Isomerismonce · 2024
- Enol Content Stability Factorsonce · 2022
- Functional Isomerismonce · 2021