CBSE Class 11 Chemistry Revision Notes

Introduction to CBSE Examination

The Central Board of Secondary Education is a national level board of education in India for private and public schools. CBSE is controlled and managed by the Union Government of India. As a part of its initiative of providing quality education, CBSE also analyses and monitors its curriculum and activities by collecting feedback from different stakeholders. It gives a child-centred and holistic education programme to prepare students for college and subsequent careers.

CBSE Class 11 Chemistry Notes

CBSE Class 11 Chemistry Notes help students prepare well for the Examination. Chemistry Notes for Class 11 include well-researched information about all the chapter topics, so that students are  able to understand each topic clearly. These notes have been prepared by subject experts and cover each chapter in detail. This involves the questions and answers that are most expected to appear in the Class 11 Examination. 

By studying Chemistry Class 11 NCERT Notes, students will be able to revise all the vital chapters quickly and be stress-free, especially before the Board Examinations. Students will also find neat and well-labelled diagrams for all the questions in Chemistry Class 11 NCERT Notes. They can also refer to them for home assignments and to prepare for competitive Examinations.

Chapter Wise Notes for Class 11 Chemistry

CBSE Class 11 Chemistry Notes offer students a chapter-wise summary of the topics, essential points to remember, elaborate explanations of the critical points, diagrams, and illustrations for better clarity of the chapter content. Prepared by a panel of experienced teachers, these chapter-wise Notes smoothen the revision process of the students for their Board Examinations. These notes have been prepared strictly according to the NCERT syllabus to ensure the provision of good quality study material.

Exercise  Topic
Chapter 1 Some Basic Concepts of Chemistry
Chapter 2 Structure of The Atom
Chapter 3 Classification of Elements and Periodicity in Properties
Chapter 4 Chemical Bonding and Molecular Structure
Chapter 5  States of Matter
Chapter 6 Thermodynamics
Chapter 7 Equilibrium
Chapter 8 Redox Reactions
Chapter 9 Hydrogen
Chapter 10 The sBlock Elements
Chapter 11 The pBlock Elements
Chapter 12 Organic Chemistry: Some Basic Principles and Techniques
Chapter 13 Hydrocarbons
Chapter 14 Environmental Chemistry

Chapter 1. Some Basic Concepts of Chemistry

The basic concepts of Chemistry written in the CBSE Syllabus Class 11 are:

  • Law of Chemical Combination
  • The Importance of Chemistry
  • Atomic and Molecular masses

Extramarks recommend students refer to CBSE Class 11 Chemistry Notes and practice daily. Class 11 Chemistry is not a complicated subject if it’s read correctly.

Chapter 2. Structure of the Atom

The structure of an atom comprising a nucleus in which the protons and neutrons are present is called atomic structure. The centre of the nucleus revolves around negatively charged particles called electrons. 

The Extramarks have designed the CBSE Class 11 Chemistry Notes based on the official marks weightage allotted by CBSE. This also presents Class 11 students with a quality learning experience.

Chapter 3. Classification of Elements and Periodicity in Properties

The sorting of elements and organising them into groups onto a tabular chart based on their properties is called a periodic table. Each group consists of elements with similar properties, and the rest are separated. CBSE Class 11 Chemistry Notes by Extramarks explain the concepts of elements and periodic Classification in detail.

Chapter 4. Chemical Bonding and Molecular Structure

Chemical Bond is the force that holds different atoms in a molecule. Types of Chemical bonds are hydrogen bonds, covalent bonds, and polar bonds. In Extramarks Notes, you will find comprehensive answers to every question from CBSE Class 11 Chemistry books written by highly experienced teachers who draft NCERT Books for students to learn.

Chapter 5. States of Matter

Matter can be solid, liquid, gas, or plasma. Matter is anything that has mass and occupies space. You can see these different states of matter in your everyday life made of tiny particles. Get the CBSE Class 11 Chemistry Notes from the Extramarks website to familiarise yourself with the essential concepts necessary for Examination preparation.

Chapter 6. Thermodynamics

Thermodynamics is the part of science that deals with the quantitative relationship between heat and other forms of energy. The four thermodynamic laws are;

  • First law
  • Second law
  • Third law
  • Zeroth law. 

The core concepts of thermodynamics are explained in CBSE Class 11 Chemistry Notes. Students can click on the links to access them or visit the Extramarks website for further guidance.

Chapter 7. Equilibrium

Chemical equilibrium occurs when Chemical products no longer undergo any further change. Chemical equilibrium is an essential aspect of biological and chemical processes. The CBSE Class 11 Chemistry Notes come in handy during the Examination preparations and revisions for the students as they get easy access to these questions and solutions provided by Extramarks.

Chapter 8. Redox reaction

Redox reaction happens when oxidation and reduction occur together. When the oxidation states of atoms are changed, and electrons get transferred between the two participating reactants, a redox reaction occurs. Subject experts at Extramarks have prepared CBSE Class 11 Chemistry Notes and explained each and every reaction and the process involved in detail and according to the latest CBSE Syllabus and its guidelines. 

Chapter 9. Hydrogen

Hydrogen is one of the most abundant elements in the universe and a significant future energy source. Hydrogen is used to manufacture nitrogenous fertilisers, unsaturated vegetable oils, and many organic compounds. The CBSE Class 11 Chemistry Notes contain structured questions with elaborate explanations of Hydrogen properties as well as their significance to help students learn and understand these concepts precisely.

Chapter 10. The sBlock Elements

The s-block elements are grouped based on the alkaline nature of the oxides and hydroxides. They have been categorised into group 1 and group 2 elements in the periodic table. The group 1 s-block elements are called alkali metals, and group 2 elements are called alkaline earth metals. You can learn more about s-block elements and the relevant concepts in CBSE Class 11 Chemistry Notes by Extramarks.

Chapter 11. The pBlock Elements

The p-block element is an element in which the last electron enters into a p-subshell. The number of p-orbitals is three, so the maximum number of electrons in a set of p-orbitals is six. So, the p-block consists of six groups. They are called p-block elements because their valence electrons are in the p-orbital. They distinguish them from the transition and inner transition series called typical Elements. The CBSE Class 11 Chemistry Notes on p-block elements, NCERT solutions, and additional questions with Solutions assist you in revising the syllabus thoroughly and scoring good grades.

Chapter 12. Organic Chemistry: Some Basic Principles and Techniques

The two branches of Chemistry are organic and inorganic Chemistry. This chapter includes topics likepurification of organic compounds, quantitative analysis of organic compounds, and qualitative analysis. Organic compounds decompose quickly and are obtained from plants and animals. The stellar team of Extramarks kept the Class 11 Chemistry Notes and NCERT Solutions in compliance with the latest CBSE Syllabus.

Chapter 13. Hydrocarbons

A Class of organic Chemicals made up of carbon and hydrogen is called hydrocarbon. The crude oil, natural gas, coal, and other natural energy sources form hydrocarbons. Types of hydrocarbons are saturated, unsaturated and aromatic hydrocarbons. The expert faculty of Extramarks provide simple and easy to understand explanations of hydrocarbons. You can visit the links to get free access to the Notes.

Chapter 14. Environmental Chemistry

The study of Chemical species’ origin, reactions, transport, and effects is called environmental Chemistry. It can also be defined as Chemical processes in air, water and living systems. This chapter contains topics like geoChemistry, atmospheric Chemistry, and Marine Chemistry. The CBSE Class 11 Chemistry Notes have answers to every textbook question, Exemplary qestions, and worksheets necessary to achieve good grades.

CBSE Class 11 Chemistry Revision Notes Important Questions for Class 11 Chemistry

The CBSE Class 11 Chemistry Notes are designed to make concepts clear to the students with practical solutions, real-life examples and detailed chapters. 

CBSE Class 11 Chemistry: Marks Distribution 



  1.  Theory
  1. Practicals

How Extramarks Can Help Students with Class 11 Chemistry?

Extramarks will help students improve their grades and get a sound understanding of concepts. The learning of the CBSE Syllabus has been made effective and accessible with engaging and highly adaptive programs. The different study modules offered by Extramarks for CBSE Revision Notes make learning efficient and straightforward. The Extramarks is the best platform that offers standard quality study materials. You can find Extramarks as an excellent online learning platform that fills the gap between the need for expert study materials and students across India. 

FAQs (Frequently Asked Questions)

1. Is Class 11 Chemistry difficult?

 Class 11 Chemistry is one of the most accessible and easy subjects if studied well. Practise thoroughly and research everything from CBSE Sample Papers to CBSE Past Year Question Papers available on the Extramarks website, and you will score admirably

2. Which is the most straightforward chapter in Chemistry Class 11th?

Basic principles and techniques in Organic Chemistry, Environmental Chemistry, and some p -block elements are some easily manageable chapters. You can refer to CBSE Class 11 Chemistry Notes by Extramarks for Important Questions, Formulas, and CBSE Extra Questions. If you daily allocate a specific time and practise the papers meticulously, you will do well in the Examinations. 

3. Is the Organic Chemistry chapter challenging?

Organic Chemistry is not as complex as it may seem. The CBSE Class 11 Chemistry Notes by Extramarks will make your studies smoother, and you will be able to ace the examination after studying through these notes

4. Where can you get Important Questions for Class 11 Chemistry?

You can get the essential Notes of Chemistry Class 11 on the Extramarks website. The links for summaries, Important Questions and answers, and study materials of Chemistry Class 11 Notes are available here. You will find the links to all the chapters mentioned in the Chemistry NCERT book.