Chemistry Revision Notes for CBSE Students by askIITians Experts 2026!
Chemistry is one of the most important subjects in the CBSE Science curriculum. Chemistry is a part of the Science subject up to Class 10 and becomes a core subject in PCM (Physics, Chemistry, Maths), PCB (Physics, Chemistry, Biology), and PCMB (Physics, Chemistry, Maths, Biology) streams in Classes 11 and 12. Chemistry includes important concepts, reactions, formulas, and principles that require regular revision before examinations. askIITians provides comprehensive Chemistry revision notes and important concepts to help students prepare effectively for CBSE exams 2026.
Chemistry plays an important role in understanding the world around us and its applications in everyday life. The Chemistry revision notes provided below contain clear explanations, important concepts, and exam-oriented information that help CBSE students revise efficiently. Chemistry revision notes for CBSE students are classified into three main branches:
Physical Chemistry
Physical Chemistry deals with the principles, properties, and behaviour of matter. Understanding Physical Chemistry concepts helps students analyse why chemical processes occur and how different factors affect them. Physical Chemistry revision notes cover the following important topics:
- Some Basic Concepts in Chemistry: This chapter explains matter, classification of matter, laws of chemical combination, mole concept, calculations, and dimensional analysis. While preparing CBSE Chemistry notes for this chapter, students should focus on understanding basic concepts and numerical problem-solving methods.
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- Solid State: This chapter explains different types of solids, their structures, classification, and properties. While revising this chapter, students should understand crystal structures, unit cells, and different types of bonding.
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- Gaseous & Liquid State: Chemistry revision notes for this chapter explain different states of matter, gas laws, molecular behaviour, pressure, temperature, volume relationships, and related calculations. Students should focus on important formulas, diagrams, and applications of ideal gas laws.
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- Atomic Structure: This chapter covers atomic models including Thomson's Atomic Model, Planck's Quantum Theory, Bohr's Atomic Model, de-Broglie equation, and Heisenberg's uncertainty principle. CBSE Chemistry revision notes explain these concepts in a simple and structured manner for better understanding.
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- Chemical Bonding & Molecular Structure: This chapter explains Octet Rule, Lewis structures, resonance, ionic bonding, covalent bonding, VSEPR theory, and molecular shapes. Students should practice drawing structures and understanding bonding concepts while revising these Chemistry notes.
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- Chemical Thermodynamics: CBSE Chemistry notes for this chapter explain thermodynamic terminology, heat, energy, work, laws of thermodynamics, enthalpy changes, Hess's Law, and Born-Haber Cycle. Students should focus on understanding concepts and numerical applications for better exam preparation.
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- Solutions: These online revision notes help students understand types of solutions, vapour pressure, Raoult's Law, Dalton's Law of Partial Pressure, colligative properties, and osmosis. Important formulas and diagrams should be revised regularly for CBSE 2026 exams.
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- Equilibrium: askIITians experts have prepared Chemistry revision notes covering physical, chemical, and ionic equilibrium, Law of Mass Action, Equilibrium Constant, Mass Action Ratio, Le Chatelier's Principle, and related concepts. Students should focus on conceptual understanding and numerical applications.
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- Redox Reactions & Electrochemistry: Chemistry revision notes for CBSE students on this chapter explain oxidation number, oxidation and reduction reactions, electrode potential, standard electrode potential, electrochemical cells, and related concepts. Students should practice numerical problems based on electrochemical principles for better preparation for CBSE 2026 examinations.
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- Chemical Kinetics: Chemistry notes for this chapter help students understand reaction rates, factors affecting the rate of reaction, order of reaction, rate laws, reaction mechanisms, and activation energy. These revision notes simplify important concepts and numerical applications required for CBSE exams.
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- Surface Chemistry: Chemistry revision notes for this chapter help students understand adsorption, absorption, catalysts, colloids, emulsions, and related concepts. These CBSE Chemistry notes explain important definitions and applications in an easy-to-understand manner.
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Organic Chemistry
Organic Chemistry deals with the study of carbon-containing compounds and their properties, structures, reactions, and applications. Since carbon forms a large number of compounds, understanding fundamental concepts is essential for CBSE Class 11 and Class 12 Chemistry preparation. CBSE Chemistry revision notes for Organic Chemistry cover the following topics:
- General Organic Chemistry: Chemistry notes for CBSE students cover the basic principles of Organic Chemistry including classification of organic compounds, nomenclature, electronic effects, reaction mechanisms, hydrocarbons, and polymers. Students should focus on understanding molecular structures and reaction concepts.
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- Hydrocarbons: CBSE revision notes for this chapter explain alkanes, alkenes, alkynes, aromatic hydrocarbons, preparation methods, properties, and chemical reactions. Students should revise important reactions and mechanisms for effective exam preparation.
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- Organic Compounds Containing Halogens: Organic Chemistry revision notes for this chapter explain haloalkanes, haloarenes, nomenclature, properties, preparation methods, and important reactions. Students should practice reaction mechanisms and examples to strengthen their understanding.
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- Alcohols, Phenols and Ether: This chapter covers the structure, classification, preparation, properties, and reactions of alcohols, phenols, and ethers. CBSE Chemistry revision notes explain these concepts with important examples and reactions for better exam preparation.
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- Aldehydes, Ketones and Carboxylic Acids: Chemistry notes for this chapter explain the structure, nomenclature, preparation, properties, and reactions of aldehydes, ketones, carboxylic acids, and their derivatives. Students should revise named reactions and important conversions.
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- Organic Compounds Containing Nitrogen: Online Chemistry revision notes help students understand amines, amino acids, nitrogen-containing organic compounds, their structures, properties, and reactions. Practice-based learning helps improve understanding of these concepts.
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- Polymers: Chemistry notes on Polymers explain classification of polymers, polymerisation processes, types of polymers, and their applications. These CBSE revision notes help students remember important concepts and examples.
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- Biomolecules: Chemistry revision notes for this chapter cover carbohydrates, proteins, amino acids, enzymes, nucleic acids, and other biomolecules. Students can use these notes to revise structures, functions, and important reactions.
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- Chemistry in Everyday Life: CBSE Chemistry revision notes explain applications of Chemistry in daily life including medicines, food additives, soaps, detergents, and other useful products. These notes help students understand practical applications of Chemistry concepts.
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- Principles Related to Practical Chemistry: CBSE notes for this chapter explain laboratory techniques, chemical analysis, preparation methods, and safe handling of chemicals. These revision notes help students prepare for practical examinations.
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Inorganic Chemistry
Inorganic Chemistry deals with the study of elements, minerals, metals, and compounds other than most carbon-based compounds. A strong understanding of Inorganic Chemistry helps students build concepts required for higher studies in fields such as Material Science, Chemical Engineering, and Environmental Science. CBSE Inorganic Chemistry revision notes cover the following important topics:
- Classification of Elements & Periodicity in Properties: In askIITians revision notes, students learn about the classification of elements, modern periodic table, electronic configuration, and periodic trends. These notes also provide useful tips to understand and remember periodic properties effectively.
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- General Principles & Processes of Isolation of Metals: This chapter explains the extraction of metals from their ores through different processes including concentration, reduction, refining, and metallurgical principles. Students can revise important concepts and examples using these Chemistry notes.
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- Hydrogen: This chapter covers the structure, preparation, properties, reactions, and applications of hydrogen. CBSE Chemistry revision notes help students understand important concepts related to hydrogen compounds and chemical reactions.
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- s-Block Elements: CBSE revision notes for this chapter explain the electronic configuration, properties, trends, and reactions of alkali metals and alkaline earth metals. Students can revise important reactions and characteristics of s-block elements easily.
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- p-Block Elements: This chapter covers the electronic configuration, properties, and reactions of p-block elements. Students learn about important groups, trends, compounds, and applications through simplified CBSE Chemistry notes.
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- d- and f-Block Elements (Transition Elements): In this chapter, students learn about electronic configurations, oxidation states, properties, and important compounds of transition and inner transition elements. These revision notes help students understand important concepts for CBSE examinations.
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- Coordination Compounds: This chapter explains coordination compounds, Werner's theory, terminology, types of complexes, bonding concepts, and their applications. It is an important chapter for CBSE Class 12 Chemistry preparation and requires regular revision.
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- Environmental Chemistry: CBSE revision notes for this chapter explain different types of pollutants, environmental effects, pollution control methods, and sustainable practices. These notes help students understand the applications of Chemistry in environmental protection.
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Why askIITians' CBSE Revision Notes are the Best for School Students Studying Chemistry?
askIITians provides well-structured Chemistry revision notes designed to help CBSE students from Class 6 to Class 12 strengthen their concepts and prepare effectively for examinations.
- Notes prepared by experienced subject experts and ex-IITians to help students build strong foundations from Class 6 onwards.
- Study material available in PDF and video formats to support different learning preferences (video lectures available through askIITians premium subscription).
- Expert guidance through detailed explanations and conceptual learning methods helps students understand complex Chemistry topics easily.
- Chapter-wise solved examples help students practice questions and improve problem-solving skills.
- Regularly updated notes aligned with the latest CBSE syllabus and examination pattern for the 2026 academic session.
Start your Chemistry preparation with askIITians revision notes and revise important concepts effectively for CBSE examinations 2026.