Notes

Revise the idea, then open the practical

Class 11 and Class 12 chemistry notes for exam recall, plus two short lab notes on burette readings. Use them with your textbook and your teacher’s instructions.

Electron shells, the kind of idea a Class 11 note walks through before the lab

Choose a class

Theory chapters for exam recall, including a few supplementary topics your school may not examine.

Structure of atomClass 11 note: particles, Rutherford and Bohr, quantum numbers, and how electrons fill orbitals — for exam recall, not a textbook rewrite.
Mole, formula, and concentrationClass 11 mole, empirical and molecular formula, molarity, molality and limiting reagent — the ideas you use in practical calculations.
Redox reactionsClass 11 redox: oxidation number rules, spotting oxidising and reducing agents, and how to balance equations — with a short bridge to Class 12 KMnO₄ titrations.
Thermodynamics basicsClass 11 thermodynamics: system types, ΔU = q + W, enthalpy, Hess’s law, entropy and Gibbs energy, written for exam recall.
Periodic table and periodicityClass 11 note: why we classify elements, Mendeleev vs modern table, s/p/d/f blocks, and the trends you actually write in exams.
Organic chemistry basicsClass 11 organic starter: how we draw structures, classify compounds, name them, and talk about isomerism and electronic effects.
HydrocarbonsClass 11 hydrocarbons: alkanes, alkenes, alkynes, and benzene — prep lines, key reactions, and the rules that decide products.
Some basic concepts of chemistryClass 11 laws of chemical combination, the mole and stoichiometry, and how those ideas show up in practical calculations.
Chemical bonding and molecular structureClass 11 bonding: ionic and covalent pictures, VSEPR shapes, valence bond, basic molecular orbital ideas, and hydrogen bonding.
EquilibriumClass 11 equilibrium: dynamic balance, Kc and Kp, Le Chatelier’s principle, and the ionic equilibrium ideas used in practicals.
Hydrogen (supplementary)Supplementary notes on hydrogen: isotopes, hydrides, water and hydrogen peroxide. Confirm with your school whether this chapter is examined.
The s-block elements (supplementary)Supplementary notes on alkali and alkaline earth metals. Confirm with your school whether this chapter is on your Class 11 exam.
The p-block Groups 13–14 (supplementary)Supplementary NCERT-style Class 11 p-block notes for Groups 13–14. May sit outside the current CBSE Class 11 board syllabus — confirm with your school.
Environmental chemistry (supplementary)Supplementary notes on pollution, ozone and the greenhouse effect. Confirm with your school whether this chapter is examined.