Chemistry · Isomerism

JEE Main 2025 — 3 April, Evening Shift — Question 20

The total number of structural isomers possible for the substituted benzene derivatives with the molecular formula $\mathrm{C}_{9} \mathrm{H}_{12}$ is $\_\_\_\_\_$ .

Answer: 8

Numerical answer — enter this value.

Step-by-step solution

Degree of unsaturation $=\frac{2 \times 9+2-12}{2}=4$

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Exam: JEE Main 2025
Paper: 3 April, Evening Shift
Subject: Chemistry
Chapter: Isomerism
Topic: Introduction & Structural Isomerism