Chapter 01 🔓 UNLOCKED · FREE SAMPLE
Units and Measurements
SI units, fundamental and derived units, Significant figures and rounding off, Dimensions of physical quantities and dimensional analysis...
All Chapters Directory 📚
Complete Class 11 PCMB (Physics, Chemistry, Mathematics, Biology) chapter directory. Read English conceptual theory 100% FREE online · Download Hindi Medium Handwritten PDF for ₹19
Physics ⚡
14 Chapters · Free Theory
Chapter 02 🔓 UNLOCKED
Motion in a Straight Line
Frame of reference, distance and displacement, Average speed, instantaneous velocity, acceleration, Kinematic equations for uniformly accelerated motion (v=u+at, s=ut+1/2at^2, v^2=u^2+2as)...
Chapter 03 🔓 UNLOCKED
Motion in a Plane
Scalar and vector quantities, vector addition, subtraction, dot product, cross product, Unit vectors and resolution of vectors in 2D, Projectile motion (Time of flight, Maximum height, Horizontal range, Equation of trajectory)...
Chapter 04 🔓 UNLOCKED
Laws of Motion
Intuitive concept of force, inertia, Newton's first law of motion, Momentum and Newton's second law of motion (F=ma), Impulse-momentum theorem...
Chapter 05 🔓 UNLOCKED
Work, Energy and Power
Work done by a constant force and a variable force, Kinetic energy, Work-Energy Theorem, Potential energy, conservative and non-conservative forces...
Chapter 06 🔓 UNLOCKED
System of Particles and Rotational Motion
Centre of mass of a two-particle system and rigid body, Momentum conservation and centre of mass motion, Torque and angular momentum, conservation of angular momentum...
Chapter 07 🔓 UNLOCKED
Gravitation
Kepler's laws of planetary motion, Universal law of gravitation, gravitational constant G, Acceleration due to gravity (g) and its variation with altitude, depth, and rotation...
Chapter 08 🔓 UNLOCKED
Mechanical Properties of Solids
Stress-strain relationship, Hooke's law, Young's modulus, bulk modulus, shear modulus of rigidity, Poisson's ratio, elastic energy stored in a stretched wire...
Chapter 09 🔓 UNLOCKED
Mechanical Properties of Fluids
Pressure in a fluid, Pascal's law and hydraulic lift, Variation of pressure with depth, atmospheric pressure, Viscosity, Stokes' law, terminal velocity, Streamline and turbulent flow...
Chapter 10 🔓 UNLOCKED
Thermal Properties of Matter
Heat and temperature, thermal expansion of solids, liquids, and gases, Specific heat capacity, calorimetry, latent heat, Heat transfer: Conduction, Convection, and Radiation...
Chapter 11 🔓 UNLOCKED
Thermodynamics
Thermal equilibrium and Zeroth law of thermodynamics, First law of thermodynamics, internal energy, work done in isothermal and adiabatic processes, Second law of thermodynamics, reversible and irreversible processes...
Chapter 12 🔓 UNLOCKED
Kinetic Theory of Gases
Equation of state of a perfect gas, ideal gas law, Postulates of kinetic theory of gases, RMS speed, average speed, most probable speed, Degrees of freedom, law of equipartition of energy...
Chapter 13 🔓 UNLOCKED
Oscillations
Periodic motion, period, frequency, Simple Harmonic Motion (SHM), Displacement, velocity, and acceleration in SHM, Energy in SHM (kinetic and potential energy)...
Chapter 14 🔓 UNLOCKED
Waves
Transverse and longitudinal waves, speed of wave motion, Displacement relation for a progressive wave, Principle of superposition of waves, reflection of waves...
Chemistry 🧪
9 Chapters · Free Theory
Chapter 01 🔓 UNLOCKED · FREE SAMPLE
Some Basic Concepts of Chemistry
General introduction, importance of chemistry, Atomic and molecular masses, mole concept and molar mass, Percentage composition, empirical and molecular formula...
Chapter 02 🔓 UNLOCKED
Structure of Atom
Bohr's model and its limitations, Dual nature of matter and light, de Broglie's relationship, Heisenberg uncertainty principle...
Chapter 03 🔓 UNLOCKED
Classification of Elements and Periodicity in Properties
Modern periodic law and present form of periodic table, Periodic trends in properties of elements: atomic radii, ionic radii, inert gas radii, Ionization enthalpy, electron gain enthalpy, electronegativity, valency...
Chapter 04 🔓 UNLOCKED
Chemical Bonding and Molecular Structure
Valence electrons, ionic bond, covalent bond, bond parameters, Lewis structure, polar character of covalent bond, dipole moment, Valence Shell Electron Pair Repulsion (VSEPR) theory...
Chapter 05 🔓 UNLOCKED
Chemical Thermodynamics
Concepts of system, surroundings, work, heat, internal energy, enthalpy, First law of thermodynamics, heat capacity and specific heat, Measurement of ΔU and ΔH, Hess's law of constant heat summation...
Chapter 06 🔓 UNLOCKED
Equilibrium
Dynamic nature of equilibrium, law of mass action, equilibrium constant (Kc and Kp), Le Chatelier's principle and its applications, Ionic equilibrium: ionization of acids and bases, strong and weak electrolytes...
Chapter 07 🔓 UNLOCKED
Redox Reactions
Concept of oxidation and reduction, redox reactions, Oxidation number rules, balancing redox reactions (oxidation number method and ion-electron method), Applications of redox reactions...
Chapter 08 🔓 UNLOCKED
Organic Chemistry — Basic Principles & Techniques
General introduction, classification and IUPAC nomenclature of organic compounds, Electronic displacements in a covalent bond: Inductive effect, Electromeric effect, Resonance/Mesomeric effect, Hyperconjugation, Homolytic and heterolytic fission, free radicals, carbocations, carbanions, electrophiles and nucleophiles...
Chapter 09 🔓 UNLOCKED
Hydrocarbons
Alkanes: Nomenclature, isomerism, conformation (Ethane sawhorse and Newman projections), physical and chemical properties, Alkenes: Nomenclature, structure of double bond, geometrical isomerism (cis-trans), addition of H2, X2, H2O, HX (Markovnikov's and Anti-Markovnikov's rule), ozonolysis, oxidation, Alkynes: Nomenclature, structure of triple bond, acidic character of alkynes, addition reactions...
Mathematics 📐
14 Chapters · Free Theory
Chapter 01 🔓 UNLOCKED · FREE SAMPLE
Sets
Sets and their representations (Roster and Set-builder form), Empty set, finite and infinite sets, equal sets, subsets, power set, universal set, Venn diagrams, set operations (Union, Intersection, Difference, Complement)...
Chapter 02 🔓 UNLOCKED
Relations and Functions
Ordered pairs, Cartesian product of two sets, Domain, co-domain, and range of a relation, Function as a special relation, pictorial representation of functions...
Chapter 03 🔓 UNLOCKED
Trigonometric Functions
Positive and negative angles, measuring angles in radians and degrees, conversion, Trigonometric functions definition using unit circle, domain and range, signs in quadrants, Graphs of trigonometric functions...
Chapter 04 🔒 Unlocks 07 Sep 2026
Complex Numbers and Quadratic Equations
Need for complex numbers, square root of -1 (i), Algebraic properties of complex numbers (addition, multiplication, conjugate, modulus), Argand plane and polar representation of a complex number...
Chapter 05 🔒 Unlocks 08 Sep 2026
Linear Inequalities
Linear inequalities in one variable and two variables, Algebraic solutions of linear inequalities in one variable and graphical representation, Graphical solution of system of linear inequalities in two variables...
Chapter 06 🔒 Unlocks 09 Sep 2026
Permutations and Combinations
Fundamental principle of counting (addition and multiplication principles), Factorial notation (n!), Permutations (nPr): derivation and applications...
Chapter 07 🔒 Unlocks 10 Sep 2026
Binomial Theorem
Historical background, statement and proof of Binomial Theorem for positive integral index, Pascal's triangle, general term and middle term in binomial expansion, Properties of binomial coefficients...
Chapter 08 🔒 Unlocks 11 Sep 2026
Sequences and Series
Sequence and Series, Arithmetic Progression (AP), arithmetic mean (AM), Geometric Progression (GP), general term, sum of n terms of GP, geometric mean (GM), Relation between AM and GM...
Chapter 09 🔒 Unlocks 12 Sep 2026
Straight Lines
Slope of a line, angle between two lines, condition for parallel and perpendicular lines, Various forms of equations of a line: slope-intercept, point-slope, two-point, intercept, normal form, General equation of a line, distance of a point from a line, distance between parallel lines...
Chapter 10 🔒 Unlocks 13 Sep 2026
Conic Sections
Sections of a cone: Circle, Parabola, Ellipse, Hyperbola, Standard equations and properties of Circle (center and radius), Standard equations and properties of Parabola (focus, directrix, axis, latus rectum)...
Chapter 11 🔒 Unlocks 14 Sep 2026
Introduction to Three Dimensional Geometry
Coordinate axes and coordinate planes in 3D space, Coordinates of a point in space, Distance formula between two points in 3D...
Chapter 12 🔒 Unlocks 15 Sep 2026
Limits and Derivatives
Intuitive idea of limit, left hand and right hand limits, Standard limits: lim (x^n - a^n)/(x - a), lim sin(x)/x, lim (e^x - 1)/x, Derivative of a function, derivative as rate of change, slope of tangent...
Chapter 13 🔒 Unlocks 16 Sep 2026
Statistics
Measures of dispersion: Range, Mean deviation, Variance, Standard deviation for ungrouped and grouped data, Analysis of frequency distributions with equal means but different variances...
Chapter 14 🔒 Unlocks 17 Sep 2026
Probability
Random experiments, sample space, events (impossible, certain, mutually exclusive, exhaustive), Axiomatic definition of probability, addition theorem of probability...
Biology 🧬
19 Chapters · Free Theory
Chapter 01 🔓 UNLOCKED · FREE SAMPLE
The Living World
What is living? Biodiversity, Need for classification, Taxonomy and Systematics, Concept of species and taxonomic hierarchy, Binomial Nomenclature (rules and conventions)...
Chapter 02 🔓 UNLOCKED
Biological Classification
Five kingdom classification (Whittaker): Monera, Protista, Fungi, Plantae, Animalia, Salient features and classification of Monera, Protista, and Fungi, Lichens, Viruses, Viroids, and Prions...
Chapter 03 🔓 UNLOCKED
Plant Kingdom
Salient features and classification of plants into major groups: Algae, Bryophytes, Pteridophytes, Gymnosperms, Angiosperms, Alternation of generations (Haplontic, Diplontic, Haplo-diplontic life cycles)...
Chapter 04 🔒 Unlocks 20 Sep 2026
Animal Kingdom
Salient features and classification of animals (non-chordates up to phyla level, chordates up to classes level), Basis of classification: levels of organisation, symmetry, diploblastic/triploblastic, coelom, segmentation, notochord...
Chapter 05 🔒 Unlocks 21 Sep 2026
Morphology of Flowering Plants
Morphology and modifications of root, stem, and leaf, Inflorescence (racemose and cymose), Flower structure (calyx, corolla, androecium, gynoecium), Fruit and Seed, Description of family Solanaceae / Fabaceae / Liliaceae...
Chapter 06 🔒 Unlocks 22 Sep 2026
Anatomy of Flowering Plants
Meristematic and permanent tissues (simple and complex), Tissue systems: Epidermal, Ground, and Vascular tissue systems, Anatomy of dicotyledonous and monocotyledonous root, stem, and leaf...
Chapter 07 🔒 Unlocks 23 Sep 2026
Structural Organisation in Animals
Animal tissues: Epithelial, Connective, Muscular, and Neural tissues, Morphology, anatomy, and functions of digestive, circulatory, respiratory, nervous, and reproductive systems of Cockroach...
Chapter 08 🔒 Unlocks 24 Sep 2026
Cell: The Unit of Life
Cell theory and cell as basic unit of life, Prokaryotic vs Eukaryotic cell structure, Plant cell vs Animal cell, Cell envelope, cell membrane (Fluid Mosaic Model), cell wall...
Chapter 09 🔒 Unlocks 25 Sep 2026
Biomolecules
Chemical constituents of living cells: Biomolecules (Carbohydrates, Proteins, Lipids, Nucleic acids), Structure and function of Proteins (primary, secondary, tertiary, quaternary), Enzymes: types, properties, enzyme action, factors affecting enzyme activity, competitive inhibition...
Chapter 10 🔒 Unlocks 26 Sep 2026
Cell Cycle and Cell Division
Cell cycle phases: Interphase (G1, S, G2) and M phase, Mitosis: Karyokinesis phases (Prophase, Metaphase, Anaphase, Telophase), Cytokinesis, Significance of mitosis, Meiosis: Meiosis I and Meiosis II, Crossing over, Synapsis, Chiasmata, Significance of meiosis...
Chapter 11 🔒 Unlocks 27 Sep 2026
Photosynthesis in Higher Plants
Photosynthesis as a means of autotrophic nutrition, site of photosynthesis (chloroplast), Pigments involved (chlorophyll a, b, carotenoids), Light reaction: Electron transport chain, Photophosphorylation (cyclic and non-cyclic), Chemiosmotic hypothesis...
Chapter 12 🔒 Unlocks 28 Sep 2026
Respiration in Plants
Exchange of gases, Cellular respiration, Glycolysis (EMP pathway), Fermentation (lactic acid and alcoholic), Aerobic respiration: TCA cycle (Krebs cycle), Electron transport system (ETS) and oxidative phosphorylation...
Chapter 13 🔒 Unlocks 29 Sep 2026
Plant Growth and Development
Phases of plant growth, growth rate (arithmetic and geometric), Conditions for growth, Differentiation, Dedifferentiation, Redifferentiation, Plant Growth Regulators (PGRs): Auxins, Gibberellins, Cytokinins, Ethylene, Abscisic acid (ABA)...
Chapter 14 🔒 Unlocks 30 Sep 2026
Breathing and Exchange of Gases
Respiratory organs in animals, Human respiratory system, Mechanism of breathing and its regulation in humans (inspiration, expiration, respiratory volumes and capacities), Exchange of gases (partial pressures), Transport of gases (O2 transport and Oxygen-Hemoglobin dissociation curve, CO2 transport)...
Chapter 15 🔒 Unlocks 01 Oct 2026
Body Fluids and Circulation
Composition of blood, blood groups (ABO and Rh factor), Coagulation of blood, Lymph, Human circulatory system: Structure of human heart and blood vessels, Cardiac cycle, Cardiac output, Electrocardiogram (ECG)...
Chapter 16 🔒 Unlocks 02 Oct 2026
Excretory Products and their Elimination
Modes of excretion: Ammonotelism, Ureotelism, Uricotelism, Human excretory system: Structure of kidney, Nephron (Glomerulus, PCT, Loop of Henle, DCT, Collecting duct), Urine formation: Glomerular filtration, Reabsorption, Secretion...
Chapter 17 🔒 Unlocks 03 Oct 2026
Locomotion and Movement
Types of movement: Amoeboid, Ciliary, Flagellar, Muscular, Skeletal muscle structure, Myofibrils, Sarcomere, Actin and Myosin filaments, Sliding filament theory of muscle contraction...
Chapter 18 🔒 Unlocks 04 Oct 2026
Neural Control and Coordination
Neuron as structural and functional unit of nervous system, Types of neurons, Conduction and transmission of nerve impulse along axon and across synapse, Central nervous system: Brain structure (Forebrain, Midbrain, Hindbrain) and Spinal cord...
Chapter 19 🔒 Unlocks 05 Oct 2026
Chemical Coordination and Integration
Endocrine glands and hormones, Human endocrine system: Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads (Testis and Ovary), Hormones of heart, kidney, and gastrointestinal tract...