While every chapter in the CBSE Chemistry syllabus is important, certain topics are frequently repeated in exams and carry higher weightage. Students should give extra attention to the following areas:

•Solid State: Types of unit cells, packing efficiency, point defects, and electrical conductivity.

•Solutions: Raoult’s law, colligative properties (especially numerical problems), abnormal molar mass.

•Electrochemistry: Nernst equation, cell potential, electrochemical series, conductance, and Kohlrausch’s law.

•Chemical Kinetics: Rate law, order of reaction, Arrhenius equation, integrated rate equations.

•Surface Chemistry: Adsorption, catalysis, and preparation of colloids.

•d-Block Elements: Properties of transition elements, oxidation states, coordination complexes.

•p-Block Elements: Group 15 and 16 compounds, important oxides, and structures.

•Coordination Compounds: Werner’s theory, nomenclature, isomerism, VBT & CFT, magnetic properties.

•Haloalkanes & Haloarenes: Mechanisms of substitution reactions (SN1 & SN2), uses of compounds.

•Alcohols, Phenols & Ethers: Reactions of phenol, electrophilic substitution, and preparation methods.

•Aldehydes, Ketones & Carboxylic Acids: Nucleophilic addition reactions, oxidation & reduction, important named reactions (Aldol, Cannizzaro, Kolbe, Reimer-Tiemann).

•Amines: Basicity, diazotisation, preparation, and important reactions.

•Biomolecules & Polymers: Structure and functions of carbohydrates, proteins, vitamins, nucleic acids, and important polymers.

•Chemistry in Everyday Life: Drugs (analgesics, antibiotics, antiseptics, etc.) and their functions.