NEET UG · Chemistry · Organic Chemistry - Some Basic Principles and Techniques
Counting Isomers
NEET asked Counting Isomers once in 2017–2026, in 2025. It belongs to Purification, Analysis and Isomerism of Organic Compounds, in Organic Chemistry - Some Basic Principles and Techniques (Chemistry).
Updated 2026-10-08
- Times asked
- 1
- in 2017–2026
- Papers
- 1
- of 10
- First asked
- 2025
- the only time
- Chance next paper
- 6%
- calibrated historical rate
Questions on this idea, by paper
2017–2026. 2025.
How NEET framed it
One-line MCQ is the usual form. Skill tested: multi-step.
- Count isomers of given formula
Chance asked next paper 6%
Every question
The question
From the official NEET UG papers, newest first. Open one for the full question, the options and the official answer.
- 2025 Q86Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula is :One-line MCQ · Hard
Papers: NEET 2025.
Same topic
Other ideas in Purification, Analysis and Isomerism of Organic Compounds
Purification, Analysis and Isomerism of Organic Compounds has 9 ideas NEET has asked; 2 of them came up in more than one question.
- Lassaigne's Test for N and Halogens2× · 2025
- Types of Distillation2× · 2025
- Lassaigne's Test for Sulphuronce · 2026
- Purification Techniquesonce · 2024
- Kjeldahl Methodonce · 2022
- Types of Structural Isomerismonce · 2021
- Chromatographyonce · 2020
- Electrophiles and Nucleophilesonce · 2017