Class 11 Chemistry Notes

These chapter-wise notes condense the entire Class 11 chemistry syllabus (NCERT, aligned with the JEE Main and NEET syllabi) into quick-revision sheets. Each chapter page gives you the essential concepts, the key formulas in one place, exam pointers that save time in the exam hall, and a quick FAQ that answers the most-asked questions.

• Some Basic Concepts — mole concept, percentage composition, empirical and molecular formulas, limiting reagent.
• Structure of Atom — Bohr model, quantum numbers, electronic configuration and the Aufbau principle.
• Classification of Elements — periodic law, s/p/d/f blocks and periodic trends.
• Chemical Bonding — Lewis structures, VSEPR, hybridisation and bond order.
• States of Matter — gas laws, ideal gas equation, van der Waals equation and the liquid state.
• Thermodynamics — enthalpy, Hess's law, spontaneity and Gibbs energy.
• Equilibrium — Kc and Kp, Le Chatelier's principle, pH, buffers and solubility product.
• Redox Reactions — oxidation numbers, balancing equations and the Nernst equation.

• Hydrogen — isotopes, hydrides, heavy water and hydrogen peroxide.
• s-Block Elements — alkali and alkaline earth metals, their trends and reactions.
• p-Block Elements — groups 13 and 14, the inert pair effect and boron chemistry.

• Organic Chemistry Basics — IUPAC naming, isomerism, inductive/resonance effects and reaction intermediates.
• Hydrocarbons — alkanes, alkenes, alkynes, Markovnikov's rule and aromatic benzene.
• Environmental Chemistry — air and water pollution, ozone depletion, acid rain and green chemistry.