The NCERT Class 11 Chemistry textbook is divided into two parts: Part I and Part II. BYJU'S provides a list of chapters for each part:
Part I chapters include Some Basic Concepts of Chemistry, Structure of Atom, Classification of Elements and Periodicity, Chemical Bonding and Molecular Structure, States of Matter, Thermodynamics, and Equilibrium.
Part II chapters include Redox Reactions, Hydrogen, s-Block Elements, p-Block Elements, Organic Chemistry- Some Basic Principles and Techniques, Hydrocarbons, and Environmental Chemistry.
Here's a more detailed outline:
Part I:
Some Basic Concepts of Chemistry: Importance and scope of Chemistry, Laws of chemical combination, and more.
Structure of Atom: Discovery of Electron, Thomson's model, and Rutherford's model.
Classification of Elements and Periodicity: Significance and development of the periodic table.
Chemical Bonding and Molecular Structure: Valence electrons, Lewis dot structures, and more.
States of Matter: Three states of matter, intermolecular forces, and phase transitions.
Thermodynamics: Concepts of System and types of systems, surroundings, work, heat, and energy.
Equilibrium: Equilibrium in physical and chemical processes.
Redox Reactions: Concept of oxidation and reduction.


This is the older addition so it has extra chapters like needed in jee advanced and other exams