Class 12 Chemistry Notes PDF (Chapter-Wise)
Class 12 Chemistry notes, important questions and syllabus for NEB exam preparation. Browse chapter-wise notes, the official syllabus and past question papers for Chemistry, all aligned with the NEB curriculum for Class 12 students.
General and Physical Chemistry
6 ChaptersUnit 1: Volumetric Analysis (General and Physical Chemistry)
Volumetric Analysis introduces the quantitative determination of substances using chemical reactions. Students learn about equivalent weight, concentration units, standard solutions, normality and the law of equivalence. The chapter also covers acid-base and redox titrations along with related numerical problems.
Unit 2: Ionic Equilibrium (General and Physical Chemistry)
Ionic Equilibrium focuses on the behavior and equilibrium of ions in aqueous solutions. It covers acid-base theories, ionization of weak electrolytes, Ka, Kb, pH, buffer solutions, solubility product, common ion effect, indicators and hydrolysis of salts.
Unit 3: Chemical Kinetics (General and Physical Chemistry)
Chemical Kinetics explores the rate at which chemical reactions occur and the factors affecting reaction rates. Students study rate laws, rate constants, order and molecularity, integrated rate equations, half-life, collision theory, activation energy, Arrhenius equation and catalysis.
Unit 4: Classification of Elements and Periodic Table (General and Physical Chemistry)
This chapter examines the organization and periodic behavior of chemical elements. Students learn about periodic trends, the arrangement of elements and the relationship between electronic configuration and chemical properties, helping them understand how properties vary across the periodic table.
Unit 5: Thermodynamics (General and Physical Chemistry)
Thermodynamics deals with energy changes associated with chemical reactions and physical processes. Students study internal energy, the First and Second Laws of Thermodynamics, enthalpy, entropy, Hess's law, thermochemical changes and Gibbs free energy to determine the spontaneity of reactions.
Unit 6: Electrochemistry (General and Physical Chemistry)
Electrochemistry explores the relationship between chemical reactions and electrical energy. The chapter covers electrode potential, standard electrodes, electrochemical series, voltaic cells, cell potential and its relationship with free energy. It also introduces commercial batteries and hydrogen-oxygen fuel cells.
Inorganic Chemistry
2 ChaptersUnit 1: Transition Metals (Inorganic Chemistry)
Transition Metals examines the characteristic properties and chemical behavior of transition elements. Students study oxidation states, complex ions, shapes of complexes, d-orbitals, crystal field theory, the origin of color in compounds and the catalytic properties of transition metals.
Unit 2: Study of Heavy Metals (Inorganic Chemistry)
This chapter provides a detailed study of important heavy metals including copper, zinc, mercury, iron and silver. It covers their occurrence, extraction, properties, important compounds, uses and industrial processes such as steel manufacturing and corrosion prevention.
Organic Chemistry
10 ChaptersUnit 1: Haloalkanes (Organic Chemistry)
Haloalkanes introduces organic compounds containing halogen atoms attached to alkyl groups. Students study their nomenclature, classification, isomerism, preparation and physical properties, followed by substitution, elimination, reduction and other important reactions of haloalkanes.
Unit 2: Haloarenes (Organic Chemistry)
Haloarenes focuses on halogen-containing aromatic compounds such as chlorobenzene. The chapter covers their nomenclature, preparation, properties and chemical reactions, including nucleophilic and electrophilic substitution, reduction and reactions such as Fittig and Wurtz-Fittig reactions.
Unit 3: Alcohols (Organic Chemistry)
Alcohols explores the structure, classification, preparation and properties of monohydric alcohols. Students learn different preparation methods and reactions involving alcohols, including oxidation, dehydration, esterification and reactions with reactive metals. Industrial preparation and common types of alcohol are also discussed.
Unit 4: Phenols (Organic Chemistry)
Phenols examines aromatic compounds containing a hydroxyl group directly attached to a benzene ring. Students study their preparation, physical and acidic properties, important reactions, electrophilic substitution and characteristic tests. The chapter also covers the uses of phenol and reactions such as Kolbe's and Reimer-Tiemann's reactions.
Unit 5: Ethers (Organic Chemistry)
Ethers introduces compounds containing an oxygen atom bonded between two organic groups. The chapter covers classification, nomenclature, isomerism and preparation through Williamson's synthesis. Students also study the physical and chemical properties and common reactions and uses of ethers.
Unit 6: Aldehydes and Ketones (Organic Chemistry)
Aldehydes and Ketones focuses on carbonyl compounds and their characteristic reactions. Students learn their preparation, nomenclature, physical properties and chemical behavior, including addition reactions, oxidation and reduction. Important reactions such as Aldol, Cannizzaro, Clemmensen and Wolff-Kishner are also covered.
Unit 7: Carboxylic Acid and its Derivatives (Organic Chemistry)
This chapter explores carboxylic acids and compounds derived from them. It covers their preparation, physical and chemical properties, acidic strength and important reactions. Students also study acid halides, amides, esters and anhydrides, including their preparation, reactions and relative reactivity.
Unit 8: Nitro Compounds (Organic Chemistry)
Nitro Compounds introduces organic compounds containing the nitro functional group. Students study the preparation, nomenclature, physical properties and chemical reactions of nitroalkanes and nitrobenzene. The chapter particularly focuses on reduction reactions and electrophilic substitution reactions of nitrobenzene.
Unit 9: Amines (Organic Chemistry)
Amines deals with nitrogen-containing organic compounds and their chemical properties. Students learn the classification, nomenclature, preparation and basic nature of aliphatic and aromatic amines. The chapter also covers important reactions of primary, secondary and tertiary amines, along with the chemistry and applications of aniline.
Unit 10: Organometallic Compounds (Organic Chemistry)
Organometallic Compounds introduces compounds containing direct bonds between carbon and metal atoms. Students learn about organolithium, organocopper and organocadmium compounds, with particular emphasis on Grignard reagents. Their preparation and reactions with water, carbonyl compounds, carbon dioxide, nitriles, esters and acid chlorides are covered.
Applied Chemistry
4 ChaptersUnit 1: Chemistry in the Service of Mankind (Applied Chemistry)
This chapter highlights the practical applications of chemistry in everyday life and industry. It covers polymers, natural and synthetic materials, fibres, dyes, drugs and pesticides. Students also learn about common synthetic polymers, types of drugs and the effects of drug addiction.
Unit 2: Cement (Applied Chemistry)
Cement introduces the chemistry and industrial production of cement. Students study the raw materials used in manufacturing, major production stages and different types of cement such as Ordinary Portland Cement and Portland Pozzolana Cement. The chapter also looks at the cement industry in Nepal.
Unit 3: Paper and Pulp (Applied Chemistry)
Paper and Pulp explains how paper is produced from natural raw materials. Students learn about the sources and preparation of raw materials, the major stages involved in pulp and paper production, production flow diagrams and the factors used to assess paper quality.
Unit 4: Nuclear chemistry and application of radioactivity (Applied Chemistry)
Nuclear Chemistry explores radioactive substances and nuclear processes and their applications. Students study natural and artificial radioactivity, units of radioactivity, nuclear reactions, fission and fusion, and nuclear power. The chapter also covers industrial and medical applications, radiocarbon dating and the harmful effects of nuclear radiation.
About Class 12 Chemistry
This page brings together everything you need for Class 12 Chemistry under the NEB curriculum — chapter-wise notes, downloadable PDF notes, important questions with solutions, the official syllabus and past board questions, all organised the way the syllabus is taught. Open any chapter above to read its notes online or grab the PDF, then work through the important questions for that topic.
Whether you are revising for the Class 12 Chemistry board exam, catching up on a chapter you missed, or looking for model questions and old NEB papers to practise with, start with the chapter notes above and use the question bank to test yourself. New notes, PDFs and questions are added regularly as the Chemistry syllabus is covered.
How to Prepare for Class 12 Chemistry
Preparing for Class 12 Chemistry requires a mix of conceptual understanding, regular revision, numerical practice and learning important chemical reactions. The syllabus covers Physical Chemistry, Inorganic Chemistry, Organic Chemistry and Applied Chemistry. Since each section requires a different preparation approach, start by going through the syllabus and identifying the chapters you find difficult.
Use Class 12 Chemistry Notes
Well-organized Class 12 Chemistry Notes PDF can be very useful for quick revision. Use chapter-wise notes to review important definitions, formulas, reactions, mechanisms, properties and key concepts. For Organic Chemistry, make separate reaction charts and focus on understanding how different compounds react rather than memorizing everything individually.
Practice Numerical Problems
Physical Chemistry requires consistent numerical practice. Give special attention to chapters such as Volumetric Analysis, Ionic Equilibrium, Chemical Kinetics, Thermodynamics and Electrochemistry. Practice formulas, calculations and numerical questions regularly, while paying close attention to units and calculation steps.
Focus on Reactions and Concepts
For Organic Chemistry, revise important preparation methods, chemical reactions, reagents, properties and conversions. In Inorganic Chemistry, focus on properties, reactions, extraction processes, compounds and important explanations. Making short tables and comparison notes can make revision easier.
Practice NEB Questions
After completing the syllabus, practice Class 12 Chemistry question papers, model questions, important questions and chapter-wise questions. This helps you understand the NEB exam pattern and identify frequently tested topics.
Revise Regularly
Keep a separate collection of formulas, reactions, definitions and important points for final revision. In the final stage, combine your Class 12 Chemistry Notes PDF with past questions and numerical practice to strengthen your preparation and improve confidence for the examination.