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Class 11: physics, chemistry, biology and maths

Every chapter, with tools to try: change a number, drag a point, run an experiment and see what happens. 184 tools so far, and more are on the way.

Physics

  1. 1 Units and Measurement

    SI units, significant figures, dimensions

  2. 2 Motion in a Straight Line

    Velocity, acceleration, kinematic equations

  3. 3 Motion in a Plane

    Vectors, projectile motion, circular motion

  4. 4 Laws of Motion

    Newton's laws, momentum, friction, circular motion

  5. 5 Work, Energy and Power

    Work-energy theorem, potential energy, collisions

  6. 6 System of Particles and Rotational Motion

    Centre of mass, torque, moment of inertia, angular momentum

  7. 7 Gravitation

    Kepler's laws, g, escape speed, satellites

  8. 8 Mechanical Properties of Solids

    Stress, strain, Hooke's law, moduli

  9. 9 Mechanical Properties of Fluids

    Pressure, Bernoulli, viscosity, surface tension

  10. 10 Thermal Properties of Matter

    Temperature, expansion, calorimetry, latent heat, heat transfer

  11. 11 Thermodynamics

    First and second laws, processes, Carnot engine

  12. 12 Kinetic Theory

    Gas pressure, temperature, equipartition, mean free path

  13. 13 Oscillations

    Simple harmonic motion, energy, pendulum

  14. 14 Waves

    Travelling waves, superposition, standing waves, beats

Chemistry

  1. 1 Some Basic Concepts of Chemistry

    Mole concept, empirical formula, stoichiometry, concentration

  2. 2 Structure of Atom

    Atomic models, spectra, Bohr model, orbitals, configuration

  3. 3 Classification of Elements and Periodicity in Properties

    Periodic table, periodic trends

  4. 4 Chemical Bonding and Molecular Structure

    Lewis structures, VSEPR, hybridisation, MO theory

  5. 5 Thermodynamics

    Enthalpy, Hess's law, entropy, Gibbs energy

  6. 6 Equilibrium

    Equilibrium constant, Le Chatelier, pH, buffers, solubility

  7. 7 Redox Reactions

    Oxidation numbers, balancing redox

  8. 8 Organic Chemistry: Some Basic Principles and Techniques

    Naming, isomerism, reaction mechanisms, purification

  9. 9 Hydrocarbons

    Alkanes, alkenes, alkynes, aromatic compounds

Biology

  1. 1 The Living World

    Living things, naming and taxonomy

  2. 2 Biological Classification

    Five kingdoms, viruses, lichens

  3. 3 Plant Kingdom

    Algae to angiosperms, life cycles

  4. 4 Animal Kingdom

    Basis of classification, animal phyla

  5. 5 Morphology of Flowering Plants

    Root, stem, leaf, flower, fruit, seed

  6. 6 Anatomy of Flowering Plants

    Tissue systems, dicot and monocot anatomy

  7. 7 Structural Organisation in Animals

    Organs and organ systems

    Tools for this chapter are coming soon.

  8. 8 Cell: The Unit of Life

    Cell theory, prokaryotic and eukaryotic cells, organelles

  9. 9 Biomolecules

    Proteins, carbohydrates, nucleic acids, enzymes

  10. 10 Cell Cycle and Cell Division

    Mitosis and meiosis

  11. 11 Photosynthesis in Higher Plants

    Pigments, light reactions, Calvin cycle, limiting factors

  12. 12 Respiration in Plants

    Glycolysis, Krebs cycle, electron transport, RQ

  13. 13 Plant Growth and Development

    Growth rates, plant hormones

  14. 14 Breathing and Exchange of Gases

    Breathing, lung volumes, gas transport

  15. 15 Body Fluids and Circulation

    Blood, heart, cardiac cycle, ECG

  16. 16 Excretory Products and their Elimination

    Kidney, urine formation

  17. 17 Locomotion and Movement

    Muscle contraction, skeleton, joints

  18. 18 Neural Control and Coordination

    Neurons, nerve impulse, synapse, brain

  19. 19 Chemical Coordination and Integration

    Endocrine glands and hormones

Maths

  1. 1 Sets

    Sets, subsets, Venn diagrams, operations

  2. 2 Relations and Functions

    Cartesian products, relations, functions and graphs

  3. 3 Trigonometric Functions

    Radians, trigonometric functions, sum and difference formulae

  4. 4 Complex Numbers and Quadratic Equations

    Algebra of complex numbers, Argand plane

  5. 5 Linear Inequalities

    Inequalities and their graphs

  6. 6 Permutations and Combinations

    Counting principle, permutations, combinations

  7. 7 Binomial Theorem

    Expansion, Pascal's triangle, general term

  8. 8 Sequences and Series

    Geometric progressions, AM and GM

  9. 9 Straight Lines

    Slope, forms of a line, distance from a line

  10. 10 Conic Sections

    Circle, parabola, ellipse, hyperbola

  11. 11 Introduction to Three-dimensional Geometry

    Coordinates in space, distance

  12. 12 Limits and Derivatives

    Limits, derivatives from first principles

  13. 13 Statistics

    Mean deviation, variance, standard deviation

  14. 14 Probability

    Events, axiomatic probability

Other classes: Class 8 · Class 9 · Class 10 · Class 12

Chapters follow the topics of the NCERT books used in 2026-27 (the new books for Class 8 and 9, the 2023 rationalised books for Class 10 to 12). fibub is an independent free site, not part of NCERT, and copies no textbook text or pictures. Every tool runs in your browser: no sign-up, nothing about you is saved.