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Class – 11 (Physics,Chemistry,Biology & Mathematics)


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Sold By: E Learning store

Doubtbox is the latest innovative product from the founders of eTutor, which is used by half a million students across the globe. This Interactive Digital Content Repository has 8000 animated topics and one lakh questions with answers for Classes 1-12 . Doubtbox pen drive, an excellent tuition master at home, facilitating self learning by students, available for   Classes 1-12, based on CBSE syllabus, with effective blending of ICSE and State Boards syllabus. Once they are set up in the home computer/lap top, students can study any lesson according to their convenience and do home work easily, watching the lessons enriched with multimedia. All the topics are explained with quality animations, graphics, pictures and diagrams along with audio explanations. Students will enjoy lessons as if seeing an animated, topic-based film.

Doubtbox Features:

Latest syllabus

Animated video lessons

Exciting visuals

Audio explanations

Multiple choice questions


Time bound test

Model test papers

Previous years question papers

NCERT solutions

System Requirements:

Processor – Minimum:1 GHZ, RAM – Minimum:2 GB

Disk Space – Minimum 10 GB Free space

Screen resolution – 1280 x 720 or above

Operating System – Windows 7 or above

Product Description

Topics Covered in doubtbox Educational Pen Drive


Chapter 1. Physical World

What is Physics?, Scope and Excitement in Physics, Physics Technology and Society, Fundamental Forces in Nature, Nature of physical Laws, Summary

Chapter 2. Units and Measurement

Introduction, The International System of Units, Measurement of Length, Measurement of Mass, Measurement of Time Accuracy, Precision of Instruments and Errors in measurement, Significant  Figures, Dimensions of Physical Quantities, Dimensional Formulae and Dimensional Equations, Dimensional Analysis and its Applications, Summary

Chapter 3. Motion in a Straight Line

Introduction, Position, Path Length and Displacement, Average Speed and Instantaneous Speed, Velocity and its Types, Acceleration, Kinematic Equations for Uniformly Accelerated Motion, Relative Velocity, Summary

Chapter 4. Motion in a Plane

Introduction, Scalars and Vectors, Multiplication of Vectors by Real Numbers, Addition and Subtraction of Vectors- Graphical Method, Resolution of Vectors, Vector Addition- Analytical Method, Motion In a Plane- Position Vector and Displacement, Motion in a Plane with Constant Acceleration, Relative Velocity in Two Dimensions Projectile Motion, Uniform Circular Motion, Summary

Chapter 5. Laws of Motion

Introduction, Aristotle’s Fallacy, The Law of Inertia, Newton’s First Law of Motion, Newton’s Second  Law of Motion, Newton’s Third  Law of Motion, Conservation of Momentum, Equilibrium of a Particle, Common Forces in Mechanics, Circular Motion, Solving Problems in Mechanics, Summary

Chapter 6. Work, Energy and Power

Introduction, Notions of Work and Kinetic Energy: The Work- Energy Theorem, Work, Kinetic Energy, Work Done by a Variable Force, The Work Energy Theorem for a Variable Force, The Concept of Potential Energy, The Conservation of Mechanical Energy, The potential Energy of a Spring, Various Forms of Energy: The Law of Conservation of Energy, Power, Collisions, Summary

Chapter 7. Systems of Particles and Rotational Motion

Introduction, Centre of Mass, Motion of Centre of Mass, Linear Momentum of a System of Particles, Vector Product of Two Vectors, Angular Velocity and its Relation with Linear Velocity, Torque and Angular Momentum, Equilibrium of a Rigid Body, Moment of Inertia, Theorems of perpendicular and Parallel Axes, Kinematics of Rotational Motion About a Fixed Axis, Dynamics of Rotational motion About a Fixed Axis, Angular Momentum in Case of a Rotation About a Fixed Axis, Rolling Motion, Summary

Chapter 8. Gravitation

Introduction, Kepler’s Laws, Universal Law of Gravitation, The Gravitational Constant, Acceleration Due to Gravity Of Earth, Acceleration Due to Gravity Below and Above the Surface of Earth, Gravitational Potential Energy, Escape Speed, Earth satellites, Energy of an Orbiting Satellite, Geostationary and Polar Satellites, Weightlessness, Summary

Chapter 9. Mechanical Properties of Solids

Introduction, Elastic behaviour of Solids, Stress and Strain, Hooke’s Law, Stress -Strain Curve, Elastic Moduli, Applications of Elastic Behaviour of Materials, Summary

Chapter 10. Mechanical Properties of Fluids

Introduction, Pressure, Streamline Flow, Bernoulli’s Principle, Viscosity, Reynold’s Number, Surface Tension, Summary

Chapter 11. Thermal properties of Matter

Introduction, Temperature and Heat, Measurement of Temperature, Ideal – Gas Equation and Absolute Temperature, Thermal Expansion, Specific Heat Capacity, Calorimetry, Change of State, Heat Transfer, Newton’s Law of Cooling, Summary

Chapter 12. Thermodynamics

Introduction, Thermal Equilibrium, Zeroth Law of Thermodynamics, Heat, Internal energy and Work, First law of Thermodynamics, Specific Heat Capacity, Thermodynamic State Variables and Equation of State, Thermodynamic processes,  Heat Engines, Refrigerators and Heat Pumps, Second Law of Thermodynamics, Reversible and Irreversible Processes, Carnot Engine, Summary

Chapter 13. Kinetic Theory

Introduction, Molecular Nature of Matter, Behaviour of Gases, Kinetic Theory of an ideal Gas, Law of Equipartition of Energy, Specific Heat Capacity of gases, solids and water, Mean free Path, Summary

Chapter 14. Oscillations

Introduction, Periodic and Oscillatory Motions, Simple Harmonic  Motion, Simple Harmonic  Motion and uniform Circular Motion, Velocity and Acceleration in Simple Harmonic Motion, Force Law for Simple Harmonic Motion, Energy in Simple Harmonic Motion, Some Systems Executing Simple Harmonic Motion, Damped Simple Harmonic motion, Forced Oscillations and  Resonance, Summary

Chapter 15. Waves

Introduction, Transverse and Longitudinal Waves, Displacement Relation In a Progressive Wave, The Speed of a Travelling Wave, The Principle of Superposition of Waves, Reflection of Waves, Beats, Doppler Effect, Summary


Chapter 1. Some Basic Concepts of Chemistry

Introduction, Nature of Matter, Properties of Matter and their Environment, Uncertainty in Measurement, Laws of Chemical Combinations, Dalton’s Atomic Theory, Atomic Mass and Molecular Mass, Mole Concept and Molar Masses, Percentage Composition, Stoichiometry and Stoichiometric Calculations, Summary

Chapter 2. Structure of Atom

Introduction, Atomic Models, Developments Leading to the Bohr’s Model of Atom, Boh’rs Model for Hydrogen Atom, Towards Quantum mechanical Model of the Atom, Quantum Mechanical model of Atom, Summary

Chapter 3. Classification of elements and Periodicity in properties

Why do We need to Classify Elements?, Genesis of Periodic Classification, Modern periodic Law and the Present Form of the Periodic Table, Nomen Clature of Elements with Atomic Numbers>100, Electronic Configurations of Elements and the Periodic Table, Electronic Configurations and Types of Elements: s-.p-,d-,f- Blocks, Periodic Trends in Properties of Elements, Summary

Chapter 4. Chemical Bonding and Molecular Structure

Kossel Lewis Approach to Chemical Bonding, Ionic or Electrovalent Bond, Bond Parameters, The Valence Shell Electron Pair Repulsion(VSEPR) Theory, Valence Bond Theory, Molecular Orbital Theory, Bonding in Some Homonuclear Diatomic Molecules, Hydrogen Bonding, Cause of Formation of Hydrogen Bond, Summary

Chapter 5. State of Matter

Intermolecular Forces, Thermal Energy, Intermolecular Forces vs Thermal Interactions, The Gaseous State, The Gas Laws, Ideal – Gas Equation, Density and Molar Mass of a Gaseous Substance, Dalton’s Law of Partial Pressure, Kinetic molecular Theory of Gases, Behaviour of Real Gases: Deviation form Ideal Gas Behaviour, Liquifaction of Gases, Liquid State, Summary

Chapter 6. Thermodynamics

Thermodynamic State, Applications, Measurement of ΔU and ΔH: Calorimetry, Enthalpy Change, ΔrH of a Reaction – Reaction Enthalpy, Enthalpies for Different types of Reactions, Spontaneity, Gibbs Energy Change Equilibrium, Summary

Chapter 7. Equilibrium

Equilibrium in Physical Processes, Equilibrium in Chemical Processes – Dynamic Equilibrium, Law of Chemical Equilibrium and Equilibrium Constant, Homogenous Equilibria, Heterogeneous Equilibria, Applications of Equilibrium Constants, Relationship between Equilibrium constant K ,Reaction Quotient Q, Gibbs Energy G-Factors Affecting Equilibria, Ionic Equilibrium in Solution, Acids, Bases and Salts, Ionisation of Acids and Bases, Buffer Solutions, Solubility Equilibria of Sparingly Soluble Salts, Summary

Chapter 8. Redox Reactions

Classical Idea of Redox Reactions- Oxidation and Reduction Reactions, Redox Reactions in Terms of Electron Transfer Reactions, Oxidation Number, Redox Reactions and Electrode Processes, Summary

Chapter 9. Hydrogen

Position of Hydrogen in the Periodic Table, Dihydrogen-H2, Preparation of Dihydrogen-H2, Properties of Dihydrogen, Hydrides, Water, Hydrogen Peroxide (H2O2), Heavy Water-D2O, Dihydrogen As a Fuel, Summary

Chapter 10. The s-Block Elements

Group 1 Elements: Alkali Metals, General Characteristics Of the Compounds of the Alkali Metals, Anomalous Properties of Lithium, Some Important Compounds of Sodium, Biological Importance of Sodium and Potassium, Group 2 Elements: Alkaline Earth Metals, General characteristics of Compounds of the Alkaline Earth Metals, Anomalous Behaviour of Berryllium, Some Important Compounds of Calcium, Biological Importance of Magnesium and Calcium, Summary

Chapter 11. The p -Block Elements

Group 13 Elements: the Boron Family, Important Trends and Anomalous Properties of Boron, Some Important Compounds of Boron, Uses of Boron and Aluminium and their Compounds, Group 14 Elements: The Carbon Family, Important Trends and Anomalous Behaviour of Carbon, Allotropes of Carbon, Some Important Compounds of Carbon and Silicon, Summary

Chapter 12. Organic Chemistry – Some Basic Principles and Techniques

General Introduction, Tetravalence of Carbon: Shapes of Organic Compounds, Structural Representations of Organic Compounds, Classification of Organic Compounds, Nomenclature of Organic Compounds, Isomerism, Fundamental Concepts in Organic Reaction Mechanism, Methods of Purification of  Organic Compounds, Qualitative Analysis of Organic Compounds, Quantitative Analysis, Summary

Chapter 13. Hydrocarbons

Classification, Alkanes, Alkenes, Alkynes, Aromatic Hydrocarbons, Carcinogenicity and Toxicity, Summary

Chapter 14. Environmental Chemistry

Environmental Pollution, Atmospheric Pollution, Water Pollution, Soil Pollution, Industrial Waste, Strategies to Control Environmental Pollution, Green Chemistry, Summary


Chapter 1. Sets

Introduction, Sets and their Representations, The Empty Set, Finite and Infinite Sets, Equal Sets, Subsets, Power Set, Universal Set, Venn Diagrams, Operations on Sets, Complement of a Set, Practical Problems on Union and Intersection of Two Sets, Summary

Chapter 2. Relations and Functions

Introduction, Cartesian Products of Sets, Relations, Functions, Summary

Chapter 3. Trigonometric Functions

Introduction, Angles, Trigonometric Functions, Trigonometric Functions of Sum and Difference of Two Angles, Trigonometric Equations, Summary

Chapter 4. Principle of Mathematical Induction

Introduction, Motivation, The Principle of Mathematical Induction, Summary

Chapter 5. Complex Numbers and Quadratic Equations

Introduction, Complex Numbers, Algebra of Complex Numbers, The Modulus and the Conjugate of a Complex Number, Argand Plane and Polar Representation, Quadratic Equations, Summary

Chapter 6. Linear Inequalities

Introduction, Inequalities, Algebraic Solutions of Linear Inequalities in One Variable and their Graphical Representation, Graphical Solution of Linear Inequalities in Two Variables, Solution of System of Linear Inequalities in Two Variables, Summary

Chapter 7. Permutations and Combinations

Introduction, Fundamental Principle of Counting, Permutations, Combinations, Summary

Chapter 8. Binomial Theorem

Introduction, Binomial Theorem for Positive Integral Indices, General and Middle Terms, Summary

Chapter 9. Sequences and Series

Introduction, Sequences, Series, Arithmetic Progression (A.P.), Geometric Progression (G . P.), Relationship Between A.M. and G.M., Sum to n Terms of Special Series, Summary

Chapter 10. Straight Lines

Introduction, Slope of a Line, Various Forms of the Equation of a Line, General Equation of a Line, Distance of a Point From a Line, Summary

Chapter 11. Conic Sections

Introduction, Sections of a Cone, Circle, Parabola, Ellipse, Hyperbola, Summary

Chapter 12. Introduction To Three Dimensional Geometry

Introduction, Coordinate Axes and Coordinate Planes in Three Dimensional Space, Coordinates of a Point in Space, Distance between Two Points, Section Formula, Summary

Chapter 13. Introduction To Three Dimensional Geometry

Introduction, Intuitive Idea of Derivatives, Limits, Limits of Trigonometric Functions, Derivatives, Summary

Chapter 14. Mathematical Reasoning

Introduction, Statements, New Statements from Old, Special Words/Phrases, Implications, Validating Statement, Summary

Chapter 15. Statistics

Introduction, Measures of Dispersion, Range, Mean Deviation, Variance and Standard Deviation, Analysis of Frequency Distributions, Summary

Chapter 15. Probability

Introduction, Random Experiments, Event, Axiomatic Approach to Probability, Summary


Chapter 1. The Living World

What is Living?, Diversity in the living World, Taxonomic Categories, Taxonomical Aids, Summary

Chapter 2. The Living World

Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom plantae, Kingdom Animalia, Viruses, Viroids and Lichens, Summary

Chapter 3. The Living World

ae, Bryophytes, Pteridophytes, Gymnosperms, Angiosperms, Plant life Cycle and Alternation of Generations, Summary

Chapter 4. Animal Kingdom

Basis of Classification, Classification of Animals, Summary

Chapter 5. Morphology of Flowering Plants

The Root, The Stem, The Leaf, The Inflorescence, The Flower, The Fruit, The Seed, Description of Some Important Families, Summary

Chapter 6. Anatomy  of Flowering Plants

The Tissues, The Tissue System, Anatomy of Dicotyledonous and Monocotyledonous Plants, Secondary Growth, Summary

Chapter 7. Structural Organisation in Animals

Animal Tissues, Organ and Organ System, Earthworm, Cockroach, Frogs, Summary

Chapter 8. Cell : The Unit of Life

What is a Cell?, Cell Theory, An Overview of Cell, Prokaryotic Cells, Eukaryotic Cells, Summary

Chapter 9. Biomolecules

How  to  Analyse Chemical Composition?, Primary and Secondary Metabolites, Biomacromolecules, Proteins, Polysaccharides, Nucleic Acids, Structure of Proteins, Nature of Bond Linking Monomers in a Polymer, Dynamic State of Body Constituents- Concept of Metabolism, Metabolic Basis for Living, The Living State, Enzymes, Summary

Chapter 10. Cell Cycle And Cell Division

Cell Cycle, M Phase, Significance of Mitosis, Meiosis, Significance of Meiosis, Summary

Chapter 11. Transport In Plants

Means of Transport, Plant-Water Relations, Long Distance Transport of Water, Transpiration, Uptake and Transport of Mineral Nutrients, Phloem Transport: Flow From Source to Sink, Summary

Chapter 12. Mineral Nutrition

Methods to Study the Mineral Requirements, Essential Mineral Elements, Mechanism of Absorption of Elements, Translocation of Solutes, Soil as Reservoir of Essential Elements, Metabolism of Nitrogen, Summary

Chapter 13. Photosynthesis in Higher Plants

What do we Know?, Early Experiments, Where Does Photosynthesis Take  Place?, How Many Pigments Are Involved in Photosynthesis, What is  Light Reaction?, The Electron Transport, Where Are The ATP AND NADPH Used?, The C4 Pathway, Phototrespiration, Factors Affecting Phototsynthesis, Summary

Chapter 14. Respiration in Plants

Do Plants Breathe?, Glycolysis, Fermentation, Aerobic Respiration , The Respiratory Balance Sheet, Amphibolic Pathway, Respiratory Quotient, Summary

Chapter 15. Plant Growth And Development

Growth, Differentiation, Dedifferentiation and Rediffetentiation, Development, Plant Growth Regulators, Photoperiodism, Vernalisation, Summary

Chapter 16. Digestion and Absorption

Digestive System, Digestion of Food, Absorption of Digested Food Products, Disorders of Digestive System, Summary

Chapter 17. Breathing and Exchange of Gases

Respiratory Organs, Mechanism of  Breathing, Exchange of Gases, Transport of Gases, Regulation of Respiration, Disorders of  Respiratory System, Summary

Chapter 18. Body Fluids and Circulation

Blood, Lymph (Tissue Fluid), Circulatory Pathways, Double Circulation, Regulation of Cardiac Activity, Disorders of Circulatory System, Summary

Chapter 19. Excretory Products and their Elimination

Human  Excretory System, Urine Formation, Function of  the  Tubules, Mechanism  of Concentration of the Filtrate, Regulation of Kidney Function, Micturition, Role of  Other Organs in Excretion, Disorders of  the  Excretory System, Summary

Chapter 20. Locomotion and Movement

Types of Movement, Muscle, Skeletal System, Joints, Disorders of Muscular and Skeletal System, Summary

Chapter 21. Neural Control and Coordination

Neural System, Human Neural System, Neuron as structural and functional unit of neural system, Central Neural system, Reflex Action and Reflex Arc, Sensory Reception and Processing, Summary

Chapter 22. Chemical Coordination and Integration

Endocrine Glands and Hormones, Human Endocrine System, Hormones of Heart, Kidney and Gastrointestinal Tract, Mechanism of Hormone Action, Summary


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