🧪 Free Chemistry Notes & Practice Quiz
The science of matter, atoms, and reactions
Chemistry is the central science. It connects physics and biology, explaining how matter is built and how it changes. From the atoms inside your body to the fuel that powers vehicles, chemistry is everywhere around you. Whether you are preparing for Class 10, Class 12, NEET, or JEE, pick your class below to see all the chapters in order, or choose Advanced to revise everything together.
Start practicing Chemistry free →⚗️ Physical Chemistry
Deals with the quantitative and theoretical side of chemistry, covering how and why reactions happen. Covers atomic structure, energy changes, reaction rates, and the behaviour of gases and solutions. Expect strong mathematical reasoning and logical problem solving.
- Mole Concept Class 11
The mole is chemistry's counting unit. Learn to relate mass, volume, and number of particles using Avogadro's number and molar mass, the foundation of all stoichiometry and reaction calculations. - Atomic Structure Class 11
Explore how electrons are arranged inside an atom. Covers Bohr's model, quantum numbers, Heisenberg's uncertainty principle, shapes of s, p, d orbitals, and electronic configuration rules. - Thermodynamics Class 11
Study energy changes in chemical reactions. Understand enthalpy, entropy, Gibbs free energy, and the laws of thermodynamics that decide whether a reaction will occur spontaneously or not. - Equilibrium Class 11
When forward and reverse reaction rates are equal, equilibrium is reached. Learn about Kc, Kp, Le Chatelier's principle, and acid-base equilibria, including pH, buffer solutions, and solubility product. - Electrochemistry Class 12
Explore the link between chemical reactions and electricity. Covers galvanic cells, electrolysis, standard electrode potentials, the Nernst equation, and real-world applications like batteries and corrosion. - Chemical Kinetics Class 12
Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step. - Solutions Class 12
Learn how substances dissolve and form mixtures. Covers concentration terms, colligative properties (boiling point elevation, freezing point depression, osmotic pressure), and ideal vs non-ideal solution behaviour. - Solid State Class 12
Explore the ordered world of crystalline solids: unit cells, packing, defects, and how structure determines electrical and magnetic properties. - Redox Reactions Class 11
Master electron transfer in chemistry: assign oxidation states, balance half-reactions, identify oxidising and reducing agents, and connect redox to everyday reactions. - States of Matter Class 11
Discover why gases expand to fill any container while liquids flow and solids hold their shape. Master the gas laws, the ideal gas equation, and the reasons real gases deviate from ideal behavior. - Surface Chemistry Class 12
Explore the chemistry that happens at interfaces, from catalysts that speed up industrial reactions to colloids like milk, smoke, and gels that surround us every day.
⚛️ Inorganic Chemistry
Focuses on elements, minerals, and compounds that are not primarily carbon-based. Covers the periodic table, chemical bonding, and the properties of metals and non-metals across groups. Heavy on concepts, patterns, and named reactions across element families.
- Periodic Table Class 11
The periodic table organises all 118 elements by atomic number and similar properties. Study periodic trends like atomic radius, ionization energy, and electronegativity, and learn how an element's position predicts its behaviour. - Chemical Bonding Class 11
Understand how atoms join to form molecules. Covers ionic and covalent bonding, VSEPR theory, hybridization (sp, sp², sp³), molecular orbital theory, bond polarity, and intermolecular forces like hydrogen bonding. - Hydrogen Class 11
The simplest and most abundant element in the universe. Study its unique position in the periodic table, isotopes (protium, deuterium, tritium), properties of water and hydrogen peroxide, and industrial uses. - s-Block Elements Class 11
Group 1 (alkali metals) and Group 2 (alkaline earth metals). Learn their reactions with water and air, important compounds like NaOH, Na₂CO₃, and CaCO₃, and anomalous behaviour of lithium and beryllium. - p-Block Elements Class 11
The largest and most diverse block, covering Groups 13 to 18. Includes non-metals, metalloids, and noble gases. Highly important for board exams and competitive tests, especially Groups 15, 16, 17, and 18. - d & f Block Elements Class 12
Transition metals (d-block) and lanthanides/actinides (f-block). Known for coloured compounds, variable oxidation states, complex formation, and catalytic properties. Frequently tested in JEE and NEET. - Coordination Chemistry Class 12
Study of compounds where a central metal atom is bonded to surrounding ligands. Covers nomenclature, types of isomerism, bonding theories (VBT, CFT), and applications in medicine, photography, and industry. - Metallurgy Class 12
The science of extracting metals from ores and refining them for use. Covers concentration methods, reduction techniques, refining processes, and the thermodynamic principles that govern metal extraction.
🧬 Organic Chemistry
The chemistry of carbon-based compounds, the largest branch of chemistry. Covers the structure, properties, and reactions of carbon compounds, from simple hydrocarbons to complex biomolecules. Extremely important for NEET and JEE aspirants.
- GOC & Isomerism Class 11
General Organic Chemistry covers the rules behind all organic reactions. Covers inductive effect, resonance, hyperconjugation, types of reactions (substitution, addition, elimination), and isomerism including optical and geometric forms. - Hydrocarbons Class 11
The simplest organic compounds made only of carbon and hydrogen. Covers alkanes, alkenes, alkynes, and aromatic compounds like benzene. Learn preparation methods, key reactions, and physical properties. - Alcohols, Phenols & Ethers Class 12
Oxygen-containing organic compounds. Understand the acidic nature of phenols, reactions of alcohols (dehydration, oxidation, esterification), and properties of ethers. Includes industrial applications and named reactions. - Carbonyl Compounds Class 12
Aldehydes, ketones, carboxylic acids, and their derivatives (esters, amides, acid chlorides). Key reactions include nucleophilic addition, Aldol condensation, Cannizzaro, and Claisen. Very heavily tested in JEE and NEET. - Amines Class 12
Nitrogen-containing organic compounds. Covers classification (primary, secondary, tertiary), basicity comparison, preparation methods, and reactions including diazotization and coupling, key for understanding dyes and pharmaceuticals. - Biomolecules Class 12
The chemistry of life: carbohydrates, proteins, lipids, nucleic acids, enzymes, and vitamins. Understand their structures, classification, and biological functions. Highly relevant for NEET and Class 12 board exams. - Polymers Class 12
Large molecules made of repeating monomer units. Covers addition and condensation polymerisation, natural and synthetic polymers (nylon, PVC, Bakelite, natural rubber), and their real-world industrial applications. - Haloalkanes & Haloarenes Class 12
Study carbon-halogen compounds: how they are made, how they react via SN1/SN2 and elimination, their stereochemistry, and their environmental impact. - Chemistry in Everyday Life Class 12
Drugs and how they interact with biological targets, chemicals in food, and cleansing agents (soaps and detergents) — chemistry applied directly to daily life and healthcare.