CBSE Class 11 Chemistry Revision Notes

Class 11 Chemistry revision notes is a stepping stone for students to hone their knowledge in Chemistry for pursuing higher courses or appearing in competitive exams. With all the Chemistry notes for class 11 available in PDF format at the official website of eSaral, students can get maximum benefit by saving these on their devices. Once you have the PDF available on your device, you can revise all the important points of this subject on the go, without connecting to the internet.

CBSE Class 11 Chemistry Weightage 2024-25

Chemistry Class 11 Chapter 1 - Some Basic Concepts of Chemistry

Our Class 11 Chemistry revision notes touch upon Chemistry's fundamentals by defining Chemistry and discussing the different sections of Chemistry that students learn as part of their curriculum. Here are the key points discussed in this chapter:

• Definition of Chemistry.

• Types of Chemistry - Organic, Physical, and Inorganic.

• Definition of matter and types of matter (solid, liquid, gas).

• Classification of matter at the macroscopic level.

• Properties of matter - Physical, Chemical.

Chemistry Class 11 Chapter 2 - Structure of Atom

The notes for class 11 Chemistry will prepare students on atoms and the discovery of subatomic particles. You can learn the following in this chapter:

• Structure of atoms - the discovery of fundamental particles (electron, proton, and neutron).

• Atomic building blocks

• Thomson model

• Bohr’s model

• Rutherford’s Alpha Scattering experiment

• Electromagnetic radiations

Chemistry Class 11 Chapter 3 - Classification of Elements and Periodicity in Properties

Our notes for class 11 Chemistry explains why the classification of elements was needed and how periodic classification came into existence. You will gain knowledge of the following topics in this chapter:

• Historical development of Periodic table - Newland’s law of octaves, Lothar Meyer’s Curve, Mendeleev’s periodic law, and Modern periodic law.

• Basics of block, period, and group.

• Properties of an element - covalent radius, atomic radius, metallic radius.

• The modern periodic law.

• Electronegativity.

• Periodic trends in chemical properties.

Chemistry Class 11 Chapter 4 - Chemical Bonding and Molecular Structure

Our Revision Notes for Chemistry Class 11 Chapter 4 explains why atoms cannot exist freely in nature and the concept of chemical bonding. The key take-aways of this chapter are:

• Chemical bond - why do atoms combine and modes of their chemical composition.

• Ionic bond with examples.

• Factors that govern ionic bonds - Ionization energy, Electron affinity, Lattice energy.

• Lewis symbols.

• Electrovalency

• Covalent bonds.

• The formal charge of an atom.

• Valence shell electron and pair repulsion theory.

• Hybridization.

• Hydrogen bonding.

• Valence bond theory.

Chemistry Class 11 Chapter 5 - States of Matter

The Chemistry notes for class 11 will acquaint students with the basics of matter and its various states. In this chapter, you would get in-depth knowledge of:

• Definition of matter.

• Intermolecular forces.

• Intermolecular forces vs thermal energy.

• The Ideal gas and Ideal gas law - Charle’s law, Gay Lussac’s law, Avogadro’s law.

• Dalton’s law of partial pressure.

• Graham’s law of diffusion.

• Kinetic theory of gases.

• Molecular distribution of speeds - Maxwell Boltzman’s distribution.

• Real gases.

Chemistry Class 11 Chapter 6 - Thermodynamics

In our Chemistry Revision Notes of thermodynamics, you would learn what thermodynamics is and its relation with Thermochemistry. The following salient topics are part of this revision notes:

• Different terminologies of Thermodynamics - System, surrounding, etc.

• State of a system and its properties.

• Thermodynamic Equilibrium - mechanical, thermal, and chemical.

• Internal energy.

• The first law of thermodynamics.

• Reversibility.

• Entropy concept.

• Need for the second law of thermodynamics.

• Types of processes - Spontaneous and Non-spontaneous.

• Gibbs free energy.

Chemistry Class 11 Chapter 7 - Equilibrium

These Chemistry notes for class 11 chapter explain the state of reactions in chemical and physical processes. You would get to know the following in this chapter:

• Equilibrium in Chemical Processes - Reversible and Irreversible reactions.

• Equilibrium Constant.

• Rate of a Reaction.

• Homogeneous Equilibria. 

• Heterogeneous Equilibria.

• Degree of Association, α

• Electrolytes - Acid, Bases, and Salts.

• Dissociation of weak acids and bases.

• Salt Hydrolysis.

Chemistry Class 11 Chapter 8 - Redox Reactions

In our notes on Redox Reactions, you would learn about classical redox reactions in terms of oxidation and reduction. Here are a few essential topics discussed in this chapter:

• Oxidation and reduction with many examples.

• Oxidation number and its rules.

• Calculation of oxidation number of elements in different compounds.

• The paradox of fractional oxidation number.

• Oxidizing and Reducing Agents.

• Balancing Redox reactions.

Chemistry Class 11 Chapter 9 - Hydrogen

The Chemistry notes for class 11 chapter discuss this element in detail like its isotopes, position in the periodic table, etc. You can go through the key points of this chapter outlined below:

• Position of Hydrogen in the Periodic Table and explanation on why it is the first element.

• Discovery and occurrence.

• Preparation of Dihydrogen - Lane’s Process, Bosch’s Process.

• Different forms of Hydrogen - atomic, Nascent, Ortho, Para, Hydrides.

• Isotopes of Hydrogen.

• Water and heavy water.

• Hydrogen Peroxide.

Chemistry Class 11 Chapter 10 - The s-Block Elements

The crucial notes of Chapter 10 explain the s-block elements concerning alkali and alkaline metals. Along with the different characteristics of the s-Block elements, you would also learn the following in this chapter:

• Alkali metals - electronic configuration, physical, and chemical properties.

• Carbonates and Bicarbonates.

• Halides.

• Anomalous behaviour of Lithium.

• Extraction of Sodium - Castner’s process, Down’s process.

• Alkaline Earth Metals - Physical and chemical properties.

• Hydroxides.

• Carbonates.

Chemistry Class 11 Chapter 11 - The p-Block Elements

Our revision notes on p-Block elements cover in detail the following main topics:

• Explanation of the group number of p-Block elements.

• Trends in properties of p-Block elements.

• The Boron family.

• Compounds of Boron.

• Aluminium - extraction (Hall-Heroult Process), properties, compounds.

Chemistry Class 11 Chapter 12 - Organic Chemistry

The crucial notes of Chapter 12 Chemistry give an in-depth knowledge of how organic Chemistry originated and its definition. The main learnings of this chapter are:

• The modern definition of organic Chemistry i.e. it is the study of carbon compounds.

• Sigma and Pi-Bonds.

• Degrees of Carbon and Hybridization.

• Breaking of Bonds - homolytic cleavage, Heterolytic cleavage.

• Inductive effect.

• Electron donating and withdrawing groups with examples.

• Mesomeric effect.

• Hyperconjugation.

• Carbon-free radicals.

Chemistry Class 11 Chapter 13 - Hydrocarbons

In our revision notes of Chapter 13, you would understand what alkanes are, how they are prepared, and miscellaneous other features of hydrocarbons. To get a deep into the details of this chapter, you could go through the list below:

• Alkanes - methods of preparation, physical, and chemical properties.

• Alkenes

• Alkynes

• Aromatic hydrocarbons

• Toxicity and carcinogenicity

Chemistry Class 11 Chapter 14 - Environmental Chemistry

The key notes of Chapter 14 cover the important topic of environmental Chemistry. You will understand the fate of different species in the environment by going through reactions, effects, and origin. The key points discussed here are:

• Environmental pollution and its effects.

• Definition of terms like a pollutant, contaminant, receptor, sink, etc.

• BOD - Biological oxygen demand.

• Environment segments - atmosphere, hydrosphere, lithosphere, biosphere.

• Air Pollution - carbon monoxide, nitrogen oxides, freons, etc.

• Carbon pollutants.

Significance of Revision Notes CBSE Class 11 Chemistry

Chemistry is one of the most important subjects for Class 11 students. You need to develop a conceptual foundation for the chapters included in the Chemistry syllabus. In Class 11, you are introduced to a lot of new concepts in Chemistry. Some of the most important topics include the basic concepts, Molecular Structure, Classification of Elements, Atomic Structure, Chemical Bonding, Periodic Properties, Chemical Equilibrium, Redox Reactions, Hydrocarbons, many more. You can take help from the 11th Chemistry Notes in order to complete their chapters and gain more knowledge about the concepts. These notes have been crafted by the learned experts at eSaral.

Pupils will be able to gain a lot of information about the concepts of Organic and Inorganic Chemistry from these chapters. The first few chapters deal with the principles and processes of Inorganic and Physical Chemistry, while the other part contains details about Organic Chemistry. You will gain a lot of insights into the chapters from the revision notes. It is important for the students of Class 11 to download Chemistry Notes for Class 11 PDF from esaral in order to gain proper conceptual knowledge about the chapters.

The Class 11 Chemistry revision notes contain explanations for the chapters, examples for better understanding, and solved questions from the textbooks. All the chemical equations, processes, and laws have been explained in great detail to ensure that you can understand the concepts easily. 

Benefits of Class 11 Chemistry Notes PDF Download

• One of the main benefits of Class 11 Chemistry Notes is that the topics and concepts have been explained very simply by the eSaral experts. They explained the concepts using simple language and understanding language.

• Referencing the solutions will enable you to learn about a lot of processes, functions, laws, and principles in Chemistry. They will also know how to solve many new numerical problems with the help of steps that have been explained.

• Another advantage of the class 11 Chemistry notes pdf  is that students can easily clarify any of their doubts by following the notes. You can use the notes to figure out the errors in your preparation and improve their own answering skills in the best way.

• In case you  miss a class or two in school due to ill-health, you don’t have to worry about missing out on the details of the Chemistry chapters. All the topics have been explained in the notes based on CBSE standards.