Academic Session 2026-27

Tamil Nadu Board Class 11 Science Important Chapters 2026-27

Key Topics & High-Weightage Chapters for TNBSE Class 11 Science

Physics • Chemistry • Biology/Mathematics • Most Important Chapters • Exam Priority Topics

4 Core Science Subjects High-Weightage Chapters Exam Focus Topics JEE/NEET Priority

Important Chapters for Science 2026-27

Focus on these high-priority chapters for effective exam preparation and maximum scores.

Unit	Important Topics	Priority
Mechanics	Laws of Motion - Newton's Laws, Friction Work, Energy and Power - Conservation Laws System of Particles - Centre of Mass, Torque Gravitation - Kepler's Laws, Satellite Motion Motion in a Plane - Vectors, Projectile Motion	Very High
Thermodynamics	Thermodynamics - Laws, Heat Engines Kinetic Theory of Gases - Gas Laws Thermal Properties - Heat, Temperature	High
Waves & Oscillations	Oscillations - SHM, Simple Pendulum Waves - Wave Motion, Doppler Effect Properties of Waves - Interference	High
Optics	Ray Optics - Reflection, Refraction, Lenses Wave Optics - Interference, Diffraction Optical Instruments - Microscope, Telescope	Medium
Modern Physics	Dual Nature - Photoelectric Effect Atoms - Bohr Model, Atomic Spectra Nuclei - Radioactivity, Nuclear Reactions Electronic Devices - Semiconductors, Diodes	High

Unit	Important Topics	Priority
Physical Chemistry	Mole Concept and Stoichiometry Structure of Atom - Quantum Model Chemical Bonding - VSEPR Theory Thermodynamics - Laws, Enthalpy Equilibrium - Chemical & Ionic Redox Reactions - Balancing	Very High
Inorganic Chemistry	s-Block Elements - Alkali & Alkaline Earth p-Block Elements - Groups 13-18 Hydrogen - Properties, Hydrides Coordination Compounds - Nomenclature	High
Organic Chemistry	IUPAC Nomenclature - General Organic Chemistry Isomerism - Structural, Stereoisomerism Hydrocarbons - Alkanes, Alkenes, Alkynes Haloalkanes and Haloarenes Alcohols, Phenols and Ethers Aldehydes, Ketones and Carboxylic Acids Amines - Classification, Properties Biomolecules - Carbohydrates, Proteins	High
Environmental Chemistry	Environmental Pollution - Air, Water, Soil Green Chemistry - Principles Waste Management - Recycling	Medium

Unit	Important Topics	Priority
Plant Physiology	Plant Transport - Water and Mineral Uptake Photosynthesis - Light Reaction, Calvin Cycle Respiration in Plants - Glycolysis, Kreb's Cycle Plant Growth and Development - Hormones Mineral Nutrition - Essential Elements	Very High
Animal Physiology	Digestion and Absorption Breathing and Exchange of Gases Body Fluids and Circulation - Blood, Heart Excretory Products - Urine Formation Locomotion and Movement - Muscle Contraction Neural Control and Coordination Chemical Coordination - Endocrine System	Very High
Genetics & Evolution	Principles of Inheritance - Mendelian Genetics Molecular Basis of Inheritance - DNA, RNA Evolution - Origin of Life, Natural Selection Genetic Disorders	High
Ecology & Environment	Organisms and Populations - Factors Ecosystem - Structure, Energy Flow Biodiversity and Conservation Environmental Issues - Pollution	Medium

Unit	Important Topics	Priority
Calculus	Limits and Derivatives - Concepts, Rules Continuity and Differentiability Application of Derivatives - Maxima/Minima Integrals - Indefinite and Definite Application of Integrals - Area under Curves Differential Equations	Very High
Algebra	Trigonometric Functions - Identities, Equations Complex Numbers and Quadratic Equations Permutations and Combinations Binomial Theorem - Expansion Sequence and Series - AP, GP	High
Vector & 3D Geometry	Vectors - Algebra, Dot and Cross Product 3D Geometry - Lines, Planes Linear Programming - Graphical Method	High
Statistics & Probability	Statistics - Measures of Central Tendency Probability - Conditional, Bayes' Theorem Random Variables and Probability Distributions	Medium

Focus first on chapters marked "Very High" and "High" priority. These chapters typically cover 60-70% of the exam marks.

Allocate more time to important chapters in your study schedule. Dedicate 2-3 days for "Very High" priority chapters.

Focus on JEE/NEET level questions from these chapters. Solve previous year competitive exam papers for practice.

Get personalized guidance and expert tips for Tamil Nadu Board Class 11 Science success.