Class 11 Chemistry NCERT Notes: Chapters-wise PDF, Important Topics & Solved Example

NCERT Class 11 Chemistry 2025

nitesh singh
Updated on Aug 4, 2025 19:19 IST

By nitesh singh, Senior Executive

Students aiming to get good scores in either school-level CBSE exams or competitive exams after 12th must have a strong foundation in chemistry. Shiksha brings complete chapter‑wise Class 11 Chemistry Notes based on the NCERT Textbooks. We also offer NCERT Solutions for class 11 subjects, including chemistry. You can access Class 11 Chemistry Solutions along with notes for better results.

NCERT Class 11 Chemistry Notes will provide you strong foundation to ace in CBSE board exams in Class 12 and competitive exams like JEE, NEET, CUET, NDA and others. Our Notes Class 11 Chemistry offer quick revision, conceptual depth and conceptual explanation, and exam-oriented facts.
 
These Short notes of Class 11 Chemistry are aligned with the latest CBSE 2025-26 syllabus. These CBSE Class 11 Chemistry Notes offer explanations of concepts, NCERT definitions, important reactions, important equations, mechanisms, numerical problem-solving methods, and diagrams too.
These NCERT Notes are also available in PDF Format. You can access Class 11 Notes PDF and study offline without the internet. You can use these notes to build advanced concept-based understanding for competitive exams. Read below for more information related to these chapter-wise Class 11 Notes;

Also Read:

Class 12 Physics Notes

Table of contents
  • Chapter Notes for Class 11 Chemistry
  • Class 11 Chemistry NCERT Solutions
  • Topic covered in Chapter-wise Class 11 Chemistry Notes
  • Features of Class 11 Chemistry NCERT Notes
  • Complete Class 11 Study Material
  • FAQs for Class 11 Chemistry
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Topic covered in Chapter-wise Class 11 Chemistry Notes

It is important that students know about the essential topics to study for the targeted exam. We have provided below all the topics covered in our notes for each class 11 physics chapter below;

Some Basic Concepts of Chemistry: Topic-wise Notes
The Class 11 chemistry chapter 1 is the foundation for the entire Chemistry syllabus. This chapter deals with fundamental concepts essential for understanding chemical reactions and calculations, especially the mole concept and stoichiometry.  Below we have mentioned important topics covered in our Class 11 Chemistry chapter 1 notes;

Section Topics Covered
1.1 Importance of Chemistry
1.2 Nature of Matter
1.3 Properties of Matter and their Measurement
1.4 Uncertainty in Measurement
1.5 Laws of Chemical Combinations
1.6 Dalton’s Atomic Theory
1.7 Atomic and Molecular Masses
1.8 Mole Concept and Molar Masses
1.9 Percentage Composition
1.10 Stoichiometry and Stoichiometric Calculations

Structure of Atom: Topic-wise Notes

The Structure of Atom chapter discusses the evolution of the understanding of matter formation. It deals with discoveries of subatomic particles, earliest to modern atomic models and the formation of the periodic table based on atomic number. This chapter has a good weight in class 11 chemistry exams.  Topics covered in this chapter include:

Section Topics Covered
2.1 Discovery of Sub‑atomic Particles
2.2 Atomic Models
2.3 Developments Leading to Bohr’s Model of Atom
2.4 Bohr’s Model for Hydrogen Atom
2.5 Towards Quantum Mechanical Model of Atom
2.6 Quantum Mechanical Model of Atom

Classification of Elements and Periodicity: Topic-wise Notes

This chapter is really important to understand the place of elements in the periodic table and the associated behavior due to their position. This chapter also explains the physical and chemical properties. The topics covered in this chapter's notes include;

Section Topics Covered
3.1 Why do we Need to Classify Elements?
3.2 Genesis of Periodic Classification
3.3 Modern Periodic Law and Present Form of Periodic Table
3.4 Nomenclature of Elements with Atomic Numbers 
3.5 Electronic Configurations of Elements and the Periodic Table
3.6 Electronic Configurations and Types of Elements: s‑, p‑, d‑, f‑Blocks
3.7 Periodic Trends in Properties of Elements

Chemical Bonding and Molecular Structure: Topic-wise Notes

The Chemical Bonding chapter is really important to learn the upcoming concepts in chemistry. This chapter focuses on how atoms bond to form molecules and different mechanisms of bonding. You can check the topics covered in this chapter below; 

Section Topics Covered
4.1

Kossel-Lewis Approach to Chemical Bonding

4.2 Ionic or Electrovalent Bond
4.3 Bond Parameters
4.4 VSEPR Theory
4.5 Valence Bond Theory
4.6 Hybridization
4.7 Molecular Orbital Theory
4.8 Bonding in Homonuclear Diatomic Molecules
4.9 Hydrogen Bonding

Chemical Thermodynamics: Topic-wise Notes

Class 11 Thermodynamics chapter is very important for understanding the exchange of heat and energy during chemical reaction. We have covered below-mentioned topics in thermodynamics notes;

Section Topics Covered
5.1 Thermodynamics Terms: System, Surroundings and State Functions
5.2 Applications: Thermodynamic Processes
5.3 Measurement of ΔU and ΔH
5.4 Enthalpy change, ∆H of a reaction – Reaction Enthalpy
5.4 (e) Hess’s Law of Constant Heat Summation
5.5 Enthalpies for Different Types of Reactions
5.5 (c,d,e...) Enthalpy of Bond Dissociation, Combustion, Formation, Atomisation, Sublimation, Ionisation, Solution and Dilution
5.6 Spontaneity, Gibbs Energy,
5.6 (d) Entropy and Second Law of Thermodynamics
5.7 Gibbs Energy Change and Equilibrium 

Chemical Equilibrium: Topic-wise Notes

The Chemical equilibrium focuses on the dynamic nature of chemical and ionic equilibrium. This is one of the most important topics and has a good weight in CBSE Exams. You can check the important topics below; 

Section Topics Covered
6.1 Equilibrium in Physical and Chemical Processes
6.2 Equilibrium in Chemical Processes: Dynamic Equilibrium
6.3 Law of Chemical Equilibrium and Equilibrium Constant
6.4 Homogeneous Equilibria
6.5 Heterogeneous Equilibria
6.6 Application of Equilibrium Constant
6.7 Relationship between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G
6.8 Factors Affecting Equilibria
6.9 Ionic Equilibrium in Solution
6.10 Acids, Bases and Salts
6.11 Ionization of Acids and Bases
6.12 Buffer Solutions
6.13 Solubility Equilibria of Sparingly Soluble Salts
6.10 Hydrolysis of Salts (elementary)

Redox Reactions: Topic-wise Notes

The Redox Reactions are high-scoring topics for the chapter that introduces oxidation and reduction reactions. Shiksha has covered all the important topics of this chapter. You can read the topics covered below;

Section Topics Covered
7.1 Classical Idea of Redox Reactions–Oxidation and Reduction Reactions
7.2 Redox Reactions in Terms of Electron Transfer Reactions
7.3 Oxidation Number
7.4 Types of Redox Reactions
7.5 Balancing of Redox Reactions
7.6 Redox Reactions as the Basis for Titrations
7.7 Redox Reactions and Electrode Processes

Organic Chemistry: Some Basic Principles and Techniques: Topic-wise Notes

This chapter explores concepts related to carbon and its compounds. Organic chemistry deals with carbonic compounds, their nomenclature, reaction mechanisms, and properties. This is one of the most important chapters in chemistry. You can check the important topics below;

Section Topics Covered
8.1 General Introduction: Organic Chemistry
8.2 Tetravalence of Carbon: Shapes of Organic Compounds
8.3 Structural Representations of Organic Compounds
8.4 Classification of Organic Compounds
8.5 Nomenclature of Organic Compounds
8.6 Isomerism
8.7 Fundamental Concepts in Organic Reaction Mechanism
8.8 Methods of Purification of Organic Compounds
8.9 Qualitative Analysis of Organic Compounds
8.10 Quantitative Analysis

Hydrocarbons: Topic-wise Notes

Hydrogen is a moderate-weight topic in chemistry. It deals with the physical and chemical properties of hydrogen. You can check the topics covered in this chapter.

Section Topics Covered
9.1 Classification of Hydrocarbons
9.2 Alkanes
9.3 Alkenes
9.4 Alkynes
9.5 Aromatic Hydrocarbon
9.6 Carcinogenicity and Toxicity

Deleted Chapter from Class 11 Chemistry NCERT Textbooks

The s-Block Element: Topic-wise Notes

This chapter deals with all the elements in the S-block of the periodic table. These elements are known as alkali and alkaline earth metals, their properties, and important compounds. There are important topics 

  • Group 1 and Group 2 Element Overview
  • Trends in Physical and Chemical Properties
  • Important Compounds of Sodium, Calcium
  • Biological Importance of Sodium, Potassium, Calcium, and Magnesium

Some p-Block Elements: Topic-wise Notes

This chapter begins the study of p-block elements, focusing on Group 13 and 14 elements and their compounds.

  • General Trends in Properties of Group 13 and 14 Elements
  • Boron and Aluminium Important Compounds
  • Carbon and Silicon Allotropes and Compounds
  • Properties and Anomalies of Boron and Carbon
  • Classification and Nomenclature of Organic Compounds
  • IUPAC Naming Rules
  • Electron Displacement Effects (Inductive, Resonance, Hyperconjugation)
  • Types of Organic Reactions
  • Purification and Elemental Analysis of Organic Compounds

States of Matter: Gases and Liquids: Topic-wise Notes

States of Matter explains the behavior of matter in gaseous and liquid states. You can read about the concept of intra- and intermolecular forces, the ideal gas condition, and many more. You can read the topics covered in this chapter below;

Environmental Chemistry: Topic-wise Notes

This chapter is of medium weightage for school-level CBSE or other exams. Occasionally, you can also find questions related to this chapter in competitive exams. Below are the important topics of this chapter;

  • Environmental Pollution – Air, Water, and Soil
  • Greenhouse Effect and Global Warming
  • Ozone Layer Depletion
  • Smog and Acid Rain
  • Green Chemistry and Sustainable Development

Hydrogen Topics

  • Position of Hydrogen in the Periodic Table
  • Dihydrogen
  • Preparation and Properties of Dihydrogen
  • Dihydrogen as a Fuel
  • Hydrides, Water, Hydrogen Peroxide
  • Heavy Water
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Features of Class 11 Chemistry NCERT Notes

Here are the important features of our Class 11 Chemistry Notes;

1. Our Class 11 Maths Notes are designed for quick revision, especially during exam time. Our Notes include concise Concepts, NCERT-based definitions, and important reactions for better exam performance.

2. We have ensured our Class 11 Chemistry notes follow the latest CBSE Exam pattern and include all the important details for the students..

3. We provide detailed conceptual explanations and summaries that help in revision and boost scores. This helps students revise major concepts in minimal time, especially when exams are just around the corner.

4. Shiksha offers step-by-step explanations of all the concepts in a lucid manner that helps students to get the real meaning if the topic and have a good understanding.

5. One of the key features is the solution of NCERT-based problems and concept-based explanations to help you understand the way to solve this kind of question.

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FAQs for Class 11 Chemistry

Here are a few important frequently asked questions related to class 11 Chemistry notes;

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Commonly asked questions
Q:  

Where can I get the best Class 11 Chemistry notes for CBSE?

A: 

Shiksha offers one of the best Class 11 Chemistry Notes useful for quick and short revision. Our Notes of Class 11 Chemistry cover step-by-step explanation, conceptual details, definition, derivation, and practice questions. You can download these class 11 notes for free through our website. We have also provided free downloadable PDF for each topic. Students can check topic-wise explanation of concept along with their diagrams. 

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NCERT Class 11 Chemistry Exam

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