Deleted Topics for CBSE Class XI Science

Deleted portion of curriculum for CBSE class XI Science stream in Physics, Chemistry, Biology and Mathematics.


Chapter 1: Physical World

Physics - scope and excitement; nature of physical laws; Physics, technology and society (To be discussed as a part of Introduction and integrated with other topics)

Chapter 3: Motion in a straight line

Frame of reference, Motion in a straight line: Position-time graph, speed and velocity

Chapter 5: Laws of Motion

Intuitive concept of force, Inertia, Newton's first law of motion; momentum and Newton's second law of motion; impulse; Newton's third law of motion

Chapter 7: System of Particles and Rotational Motion

Statement of parallel and perpendicular axes theorems and their applications.

Chapter 8: Gravitation

Kepler's laws of planetary motion, Acceleration due to gravity

Chapter 9: Mechanical Properties of Solids

Elastic behaviour, shear modulus of rigidity, Poisson's ratio; elastic energy.

Chapter 11: Thermal properties matter

Heat, temperature, Heat transfer-conduction, convection and radiation

Chapter 12: Thermodynamics

Heat engine and refrigerator.

Chapter 15: Waves

Fundamental mode and harmonics, Doppler effect.


1. Some Basic Concepts of Chemistry

Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules.

2. Structure of Atom

Discovery of Electron, Proton and Neutron, atomic number, isotopes and isobars. Thomson's model and its limitations. Rutherford's model and its limitations

3. Classification of Elements and Periodicity in Properties

Significance of classification, brief history of the development of periodic table

4. Chemical Bonding and Molecular Structure


5. States of Matter: Gases and Liquids

Liquefaction of gases, critical temperature, kinetic energy and molecular speeds (elementary idea), Liquid State - vapour pressure, viscosity and surface tension (qualitative idea only, no mathematical derivations)

6. Chemical Thermodynamics

Heat capacity and specific heat capacity, Criteria for equilibrium

7. Equilibrium

Hydrolysis of salts (elementary idea), Henderson Equation

8. Redox Reactions

Applications of redox reactions

9. Hydrogen

Preparation, properties and uses of hydrogen, hydrogen peroxide - preparation, reactions and structure and use

10. s-Block Elements

Preparation and Properties of Some Important Compounds: Sodium Carbonate, Sodium Chloride, Sodium Hydroxide and Sodium Hydrogen carbonate, Biological importance of Sodium and Potassium. Calcium Oxide and Calcium Carbonate and their industrial uses, biological importance of Magnesium and Calcium.

11. Some p-Block Elements

Some important compounds: Borax, Boric acid, Boron Hydrides, Aluminium: Reactions with acids and alkalies, uses.

Carbon: uses of some important compounds: oxides. Important compounds of Silicon and a few uses: Silicon Tetrachloride, Silicones, Silicates and Zeolites, their uses.

12. Organic Chemistry: Some basic Principles and Techniques

Methods of purification, qualitative and quantitative analysis

13. Hydrocarbons

Free radical mechanism of halogenation, combustion and pyrolysis.

14. Environmental Chemistry

Entire chapter


Unit 1: Diversity of Living Organisms

Chapter-1: The Living World

  • taxonomy and systematics;
  • tools for study of taxonomy - museums, zoological parks, herbaria, botanical gardens, keys for identification.

Chapter-3: Plant Kingdom

  • Angiospermae; Angiosperms - classification up to class, characteristic features and examples.

Unit-II: Structural Organization in Animals and Plants

Chapter-5: Morphology of Flowering Plants

  • Morphology and modifications: Morphology of different parts of flowering plants: root, stem, leaf, fruit and seed.
  • Description of families: Fabaceae

Chapter-6: Anatomy of Flowering Plants

  • Anatomy and functions of different tissues and tissue systems in dicots and monocots. Secondary growth.

Chapter-7: Structural Organisation in Animals

  • Morphology, Anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect (cockroach), (a brief account only).

Unit-IV: Plant Physiology

Chapter-11: Transport in Plants

Movement of water, gases and nutrients; cell to cell transport, diffusion, facilitated diffusion, active transport; plant-water relations, imbibition, water potential, osmosis, plasmolysis; long distance transport of water - Absorption, apoplast, symplast, transpiration pull, root pressure and guttation; transpiration, opening and closing of stomata; Uptake and translocation of mineral nutrients - Transport of food, phloem transport, mass flow hypothesis.

Chapter-12: Mineral Nutrition

Essential minerals, macro- and micronutrients and their role; deficiency symptoms; mineral toxicity; elementary idea of hydroponics as a method to study mineral nutrition; nitrogen metabolism, nitrogen cycle, biological nitrogen fixation.

Chapter-15: Plant - Growth and Development

  • Seed germination; phases of plant growth and plant growth rate; conditions of growth; differentiation, dedifferentiation and redifferentiation; sequence of developmental processes in a plant cell;
  • Seed dormancy; vernalisation; photoperiodism

Unit-V: Human Physiology

Chapter-16: Digestion and Absorption

  • Alimentary canal and digestive glands, role of digestive enzymes and gastrointestinal hormones; Peristalsis, digestion, absorption and assimilation of proteins, carbohydrates and fats; calorific values of proteins, carbohydrates and fats; egestion; nutritional and digestive disorders - PEM, indigestion, constipation, vomiting, jaundice, diarrhoea.

Chapter-20: Locomotion and Movement

  • Types of movement - ciliary, flagellar, muscular;
  • Skeletal system and its functions; joints; disorders of muscular and skeletal systems - myasthenia gravis, tetany, muscular dystrophy, arthritis, osteoporosis, gout.

Chapter-21: Neural Control and Coordination

  • Reflex action; sensory perception; sense organs; elementary structure and functions of eye and ear.


Unit I: Sets and Functions

1. Sets

  • Difference of sets.
  • Complement of a set. Properties of Complement

2. Relations & Functions

  • up to RXRXR
  • Sum, Difference, product and quotients of functions

3. Trigonometric Functions

  • General Solutions of trigonometric equations of the type siny=sina, cosy=cosa and tany= tana.

Unit II: Algebra

1. Principle of Mathematical Induction

  • Delete full chapter

2. Complex Numbers and Quadratic Equations

  • Polar representation of complex numbers.
  • Square root of a complex number.

3. Linear Inequalities

  • Nil

4. Permutations and Combinations

  • Derivation of formulae for nPr and nCr

5. Binomial theorem

  • Delete full Chapter

6. Sequence and Series

Formulae for the following special sums - ∑𝑘, ∑k2, ∑𝑘3

Unit III: Coordinate geometry

1. Straight Lines

  • Shifting of origin.
  • Equation of family of lines passing through the point of intersection of two lines.

2. Conic sections

  • a point, a straight line and a pair of intersecting lines as a degenerated case of a conic section.

3. Introduction to Three-dimensional Geometry

  • Nil

Unit IV: Calculus

1. Limits and Derivatives

  • Nil

Unit V: Mathematical Reasoning

1. Mathematical Reasoning

  • Delete full chapter

Unit VI: Statistics and Probability

1. Statistics

  • Analysis of frequency distributions with equal means but different variances.

2. Probability

  • Axiomatic (set theoretic) probability, connections with other theories of earlier classes