NCERT Class 11 Chemistry Notes - Download Chapter wise PDF Notes

Class 11 Chemistry Notes are the revision notes that discuss all the chapters covered in the NCERT textbook of Chemistry. The chapter-wise notes help to learn the syllabus in detail. These notes provide clear and detailed explanations of each chapter to understand core concepts and revise quickly before exams. The topics like atomic structure, chemical bonding, thermodynamics, equilibrium, etc., are highlighted here.

This Story also Contains

1. Chapter wise Chemistry Notes For Class 11
2. Chapter List (PART 1)
3. Chapter List (PART 2)
4. Deleted/Removed Chapter From Class 11 Chemistry
5. Chapter-wise Breakdown of CBSE Class 11 Chemistry Notes
6. Other CBSE NCERT Study Resources

The NCERT Class 11 Chemistry Book chapter-wise notes include a total of 9 chapters covering both part-1 and part 2 chemistry books. These notes are meticulously curated like a mini handbook of chemistry. The most recent CBSE curriculum is followed in the preparation of the NCERT notes to help students learn in an organized manner and enhance their capacity to answer both theoretical and numerical problems. They are particularly helpful for preparing for competitive exams like JEE and NEET as well as board exams. Students can also check out NCERT Solutions to practice the textbook questions.

Chapter wise Chemistry Notes For Class 11

NCERT Class 11 Chemistry notes include 9 chapters, as five chapters have been removed by NCERT from the CBSE syllabus. CBSE Class 11 is the base for advanced topics in the related subjects that will appear in Class 12. Thus, it becomes mandatory for Class 11 students to read and understand each of the topics in the easiest and most effective way with the help of these notes.

CBSE Class 11 Chemistry Notes explain all the important concepts, equations, reactions, and frequently asked questions. Students can easily download all the NCERT Notes in PDF for free and score good marks in their board examination. Chemistry notes help to learn the syllabus in detail, which includes the physical, inorganic, and organic chapters of the NCERT Class 11 Chemistry Book.

Class 11 chemistry is divided into two parts with a total of 9 chapters; part 1 contains 6 chapters and part contain 3 chapters.

Chapter List (PART 1)

Chapter-1 - Some Basic Concepts of Chemistry

Chapter-2 - Structure of Atom

Chapter-3 - Classification of Elements and Periodicity in Properties

Chapter-4 - Chemical Bonding and Molecular Structure

Chapter-5 - Thermodynamics

Chapter-6 - Equilibrium

Chapter List (PART 2)

Chapter-7 - Redox Reaction

Chapter-8 - Organic chemistry- some basic principles and techniques

Chapter-9 - Hydrocarbons

Deleted/Removed Chapter From Class 11 Chemistry

The five chapters have been removed from the revised NCERT Class 11 Chemistry Textbook 2023–24. These chapters are listed below-

• States of Matter

• Hydrogen

• The s-block Elements

• The p-Block Elements

• Environmental Chemistry

Chapter-wise Breakdown of CBSE Class 11 Chemistry Notes

Chapter 1-Some Basic Concepts of Chemistry

NCERT Exemplar Class 11 Chemistry Notes Chapter 1 Some Basic Concepts of Chemistry will help you learn the properties of matter and the principles and laws related to it. The important topics covered are,

• Nature of matter
• Properties of matter and their measurement
• Uncertainty in measurement
• Laws of Chemical Combinations
• Dalton Atomic Theory
• Mole Concept and Molar Mass
• Percentage composition
• Stoichiometry and stoichiometric calculation

Laws of Chemical Combinations - Different elements combine to form compounds. The Laws of Chemical Combination has two basic laws. According to the Law of Conservation of Mass, the total mass of the components before and after a chemical reaction remains constant that means nothing is lost or gained. Another is the Law of Constant Proportions, which states that the same elements are always present in a compound in the same fixed mass ratio. Water, for example, always contains a mass ratio of 1:8 for hydrogen to oxygen. These laws provide us a definite, predictable understanding of how elements react and mix.

Chapter 2-Structure of Atom

NCERT notes for chapter 2 contain all the concepts related discussed in the chapter. This chapter on Structure of Atom Class 11 notes also includes some FAQs to clarify some of the most frequent and important questions.The important topics covered are-

• Subatomic Particles
• Discovery of the Electron
• Charge-to-Mass Ratio of Electron
• Discovery of Protons and Neutrons
• Atomic Models
• Thomson Model of Atom
• Rutherford’s Nuclear Model of the Atom
• Atomic Number and Mass Number
• Isobars and Isotopes
• Drawbacks of Rutherford’s Model
• Planck’s Quantum Theory
• Atomic Spectra: Evidence of Quantized Energy Levels
• Bohr’s Model for Hydrogen Atom
• Line Spectrum of Hydrogen
• Drawbacks of Bohr’s Model
• Towards Quantum Mechanical Model of Atom
• Dual Behaviour of Matter
• Heisenberg’s Uncertainty Principle
• Quantum Mechanical Model of Atom
• Orbitals and Quantum Numbers
• Shapes of Atomic Orbitals
• Energies of Orbitals
• Filling of Orbitals in Atom
• Electronic Configuration of atoms
• Stability of filled and half-filled subshells

Chapter 3-Classification of Elements and Periodicity in Properties

Classification of elements and periodicity in properties is very important for Class 11 since it explains basics like chemical bonding and periodicity. The NCERT notes Class 11 Chemistry chapter 3 focuses on representing the concepts in the easiest way possible. The important topics covered are -

• Why Do We Need to Classify Elements?

• Mendeleev periodic table

• Genesis of Periodic Classification

• Modern Periodic Law and The Present Form of The Periodic Table

• Nomenclature of Elements with Atomic Numbers > 100

• Electronic Configurations of Elements and The Periodic Table

• Periodic Trends in Properties of Elements

Mendeleev’s periodic table
Dmitri Ivanovich Mendeleev proposed the periodic table in 1869. He observed that the physical and chemical properties of elements were connected to their atomic masses periodically. Mendeleev's Law states that the chemical characteristics of elements are a periodic function of their atomic weights.

Limitations-

• The position of Isotopes could not be explained.
• The wrong order of atomic masses could not be justified. For example, while Argon has an atomic mass of 40, and K has a low atomic mass of 30, although K should be placed first due to his low atomic mass.
• Also the position of hydrogen was not explained.

Chapter 4-Chemical Bonding and Molecular Structure

The chapter Chemical bonding and molecular structure talks about the structure, the bond formation, and the properties of the molecules. The concepts disscussed in he NCERTnotes chapter 4 hold high importance as it forms basis for inorganic chemistry. The important topics covered are-

• VSEPR theory

• Lewis structures

• Valence bond theory

• The polar character of covalent bonds

• The concept of hybridization

• The molecular orbital theory of homonuclear diatomic molecules

• Hydrogen bonding

Chapter 5-Thermodynamics

The NCERT notes chapter 5 features the relationship between heat and other forms of energy. This is one of the most importanct chapters in Physical chemistry. The important topics covered are-

• Themodynamic terms
• Enthalpy change
• Entropy
• Calorimetry
• Types of reaction
• Spontaneity

States of a system-
The quantities like temperature, pressure, the volume combines to form the composition of the system. But in order to deal with these quantities, we must have average conclusions of such measurements so we introduce a term called state functions or state variables. These quantities like pressure(p), volume(V), temperature(T), and amount(n) are referred as state variables or state functions.

Internal energy: It is define as the combined energy or sum of energies such as mechanical, electrical or chemical etc. of the system. This is generally denoted by the letter ‘U’.

Chapter 6-Equilibrium

The NCERT exemp notes of chapter 6 gives a clear idea of the concepts mentioned in the chapter. Chemical equilibrium is the state in which neither the reactants nor the products can alter any further. When a system attains equilibrium, the forward and backward reaction rates remains constant. The important topics covered are-

• Solid-liquid Equilibrium
• Liquid-vapour Equilibrium
• Solid – Vapour Equilibrium
• Equilibrium In Chemical Processes – Dynamic Equilibrium
• Law Of Chemical Equilibrium And Equilibrium Constant
• Homogeneous Equilibria
• Heterogeneous Equilibria
• Relationship Between Equilibrium Constant K, Reaction Quotient Q And Gibbs Energy G
• Factors Affecting Equilibria
• Ionic Equilibrium In Solution
• Acids, Bases And Salts
• Ionisation Of Acids And Bases
• Buffer Solutions
• Solubility Equilibria Of Sparingly Soluble Salts

Chapter 7-Redox Reactions

The NCERT notes for Redox Rections gives you a clear idea of all the important concepts. You can also practice questions from NCERT Exemplar as it includes all type of questions. The important topics covered are-

• Oxidation And Reduction Reactions
• Redox Reactions In Terms Of Electron Transfer Reactions
• Competitive Electron Transfer Reactions
• Oxidation Number
• Types Of Redox Reactions
• Balancing Of Redox Reactions
• Redox Reactions As The Basis For Titrations
• Redox Reactions And Electrode Processes

A redox reaction is a chemical reaction in which we can see the transfer of electrons occur in between two reactants i.e. one is going to be reduced and the other is going to gain that electron.

Oxidation number can be defined as the bond formation of ionic bonds with other heteroatoms and at the same time attaining the charge on that atom. For example,

The oxidation state oxygen is -2 in most of the compounds. Although it acquires other oxidation number as well depending on the elements it is connected with.

All alkali metal ions are always having a +1 oxidation state

Chapter 8-Organic Chemistry-Some Basic Principles and Techniques

The chapter is too crucial for building the basis of organic chemistry. The NCERT notes will quite be helpful since it will help you understand the fundamentals in easiest way possible. The important topics covered are-

• Tetravalence Of Carbon: Shapes Of Organic Compound
• Structural Representations Of Organic Compounds
• Classification Of Organic Compounds
• Nomenclature Of Organic Compounds
• Isomerism
• Fundamental Concepts In Organic Reaction Mechanism
• Methods Of Purification Of Organic Compounds
• Qualitative Analysis Of Organic Compounds
• Quantitative Analysis

Chapter 9-Hydrocarbons

Hydrocarbons are building blocks of fuels, plastic, and many essential chemicals. The NCERT notes class 11 chapter 9 has presented all the concepts in simple yet informative way. The important topics covered are-

• Classification
• Alkanes
• Alkenes
• Alkynes
• Aromatic Hydrocarbon
• Carcinogenicity And Toxicity

The compounds that are formed with the help of carbon and hydrogen are known as Hydrocarbons. The notes will help you distinguish a variety of hydrocarbons, e.g. saturated or unsaturated hydrocarbons, cyclic or acyclic, aromatic or non-aromatic etc.

Other CBSE NCERT Study Resources

The links provided in the table will help you get an idea about the syllabus and the respective books. Also, take a look at subject-wise notes and solutions for your exam preparations.

NCERT Exemplar Class 11 Solutions

Go through the links in the table below to get hands on exemplar solutions of the subjects-