CBSE Class 12 Syllabus (Science)

(Revised) CBSE Class 12 Syllabus for Science 2020-21

Due to this corona virus situation the students had lost their valuable time. The students are worried about their studies and also the lengthy syllabus. So the Central Government of Secondary Education [CBSE] has decided to reduce the syllabus of class 9th to 12th. The whole chapter has not reduced but some topics and portion are deleted from the exam syllabus.


CBSE Class 12 Syllabus (Science)



So here we provide you a complete list of topics that has been reduced from the syllabus of class 12th. We provide the list of Science group - Physics, Chemistry Mathematics, Biology, Computer Science, Informative Technology and Physical Education. The reduced topics are given chapterwise.

Checkout the new 2020 21 CBSE class 12 syllabus for Science stream.


Courses after class 12th pcb

 

CBSE class 12 syllabus Physics

Chapters

Deleted Portion

Electric charges and fields

 

uniformly charged thin spherical shell (field inside and outside).

Current Electricity

 

Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors

Moving Charges and   Magnetism

 

Cyclotron

Magnetism and Matter

 

magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and

perpendicular to its axis, torque on a magnetic dipole (bar magnet) in a uniform magnetic

field; Para-, dia- and ferro - magnetic substances, with examples. Electromagnets and factors affecting their strengths, permanent magnets.

Alternating Current

 

power factor, wattless current.

Electromagnetic Waves

 

Basic idea of displacement current,

Ray Optics and Optical Instruments

 

Reflection of light, spherical mirrors,(recapitulation) mirror formula , Scattering of light - blue colour of sky and reddish appearance of the sun at sunrise and

sunset, resolving power of microscope and astronomical telescope, polarisation, plane polarised light, Brewster's law, uses of plane polarised light and Polaroids.

Dual Nature of radiation and matter

 

Davisson-Germer experiment

Nuclei

 

Radioactivity, alpha, beta and gamma particles/rays and their properties; radioactive decay law, half life and mean life binding energy per nucleon and its variation with mass number

Semiconductor Electronics: Materials, Devices and Simple Circuits

 

Zener diode and their characteristics, zener diode as a voltage regulator.

Practical's

 

No investigatory project and Activity to be demonstrated

8 experiments

 


  

 CBSE class 12 syllabus Chemistry

Chapters

Deleted portion

Solid State

 

Electrical and magnetic properties. Band theory of metals, conductors, semiconductors and insulators and n and p type semi conductors.

Solutions

Abnormal molecular mass, Van't Hoff factor

Electrochemistry

 

Lead accumulator, fuel cells, corrosion, law of electrolysis (elementary idea), dry cell- electrolytic cells and Galvaniccells 

Chemical

Kinetics

 

Concept of collision theory (elementary idea, no mathematical treatment), activation energy, Arrhenius equation.

Surface

Chemistry

 

emulsion - types of emulsions, catalysis: homogenous and heterogeneous, activity and selectivity of solid catalysts; enzyme catalysis

General

Principles and

Processes of

Isolation of

Elements

 

Entire unit

p-Block

Elements

 

Preparation and properties of Phosphine, Sulphuric Acid: industrial process of manufacture, Oxides of Nitrogen (Structure only); Phosphorus - allotropic forms, compounds of Phosphorus: Preparation and properties of Halides and Oxo acids (elementary idea only).

d and f Block

Elements

 

Chemical reactivity of lanthanoids, Actinoids -Electronic configuration, oxidation states and comparison with lanthanoids.

Preparation and properties of KMnO4 and K2Cr2O7

Coordination

Compounds

 

Structure and stereoisomerism, importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).

Haloalkanes and

Haloarenes

Uses and environmental effects of -dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.

Alcohols,

Phenols and

Ethers

uses with special reference to methanol and ethanol.

Aldehydes,

Ketones and

Carboxylic

Acid

nil

Amines

 

Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

Biomolecules

 

Oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen), importance of carbohydrates.

Vitamins– classification and functions

Enzymes

Hormones -

Elementary idea excluding structure.

Polymers

entire chapter

Chemistry in

Everyday life

entire chapter

  

Practical 

 Following portions should be considered deleted.

 A. Surface Chemistry

  1. Preparation of one lyophilic and one lyophobic sol Lyophilic sol - starch, egg albumin and gum Lyophobic sol - aluminium hydroxide, ferric hydroxide, arsenous sulphide.
  2. Dialysis of sol-prepared in (1) above.
  3. Study of the role of emulsifying agents in stabilizing the emulsion of different oils.

 

B. Chemical Kinetics

  1. Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.
  2. Study of reaction rates of any one of the following:

  • Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentration of Iodideions.
  • Reaction between Potassium Iodate, (KIO3) and Sodium Sulphite: (Na2SO3)using starch solution as indicator (clock reaction).

 

C. Thermo chemistry Any one of the following experiments

  1. Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.
  2. Enthalpy of neutralization of strong acid (HCI) and strong base(NaOH).
  3. Determination of enthaply change during interaction (Hydrogen bond formation) between Acetone and Chloroform.

 

D. Electrochemistry Variation of cell potential in Zn/Zn 2+|| Cu2+/Cu with change in

concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.


G. Preparation of Organic Compounds Preparation of any one of the following compounds

  1. Acetanilide
  2. Di-benzal Acetone
  3. p-Nitroacetanilide

Aniline yellow or 2 - Naphthol Anilinedye

 

 

CBSE class 12 syllabus Mathematics

Chapter

Deleted Portion

Relations and Functions

Composite functions

Inverse of a function

Inverse Trigonometric Functions

Graphs of inverse trigonometric functions

Elementary properties of inverse trigonometric functions

Matrices

Existence of non-zero matrices whose product is the zero matrix.

Concept of elementary row and column operations.

Proof of the uniqueness of inverse, if it exists.

Determinants

Properties of determinants, Consistency,   inconsistency and number of solutions of system of linear equations by examples

Continuity and Differentiability

Rolle’s and Lagrange's Mean Value Theorems (without proof)   and their geometric interpretation

Applications of Derivatives

Rate of change of bodies

Use of derivatives in approximation

Integrals

∫ √π‘Žx2 + π‘π‘₯ + π‘ dx,

∫(π‘Žπ‘₯ + π‘)√π‘Žπ‘₯2 + π‘π‘₯ + π‘ dx

Definite integrals as a limit of a sum

Applications of the Integrals

Area between any of the two above said curves

Differential Equations

Formation of differential equation whose general solution is given.

Solutions of linear differential equation of the type: dy/dx + px = q, where p and q are functions of y or constants.

Vectors

Scalar triple product of vectors.

Three - dimensional Geometry

Angle between (i) two lines, (ii) two planes, (iii) a line and

a plane

Linear Programming

Mathematical formulation of L.P. problems

(unbounded)

Probability

Mean and variance of random variable.

Binomial probability distribution

 

 


Courses after 12th with pcm  

     


    CBSE class 12 syllabus Biology

     

    Chapters

    Deleted Portion

    Chapter-1: Reproduction in Organism

     

    Reproduction, a characteristic feature of all organisms for continuation of species; modes of reproduction - asexual and sexual reproduction; asexual reproduction - binary fission, sporulation,   budding, gemmule formation, fragmentation; vegetative propagation in plants.

    Chapter-7: Evolution

     

    Origin of life; biological evolution and evidences for biological evolution (paleontology, comparative anatomy, embryology and molecular evidences); Darwin’s contribution, modern synthetic theory of evolution; mechanism of evolution - variation (mutation and recombination) and natural selection with examples, types of natural selection; Gene flow and genetic drift; Hardy – Weinberg’s principle; adaptive radiation; human evolution.

    Chapter 9: Strategies for Enhancement in Food Production

     

    Animal husbandry, Plant breeding, tissue culture, single cell protein.

    Chapter-14: Ecosystem

     

    Ecosystems: Patterns, components; productivity and decomposition; energy flow; pyramids of number, biomass, energy;   nutrient cycles (carbon and phosphorous); ecological succession; ecological services - carbon fixation, pollination, seed dispersal, oxygen release (in brief).

    Chapter 16: Environmental Issues

     

    Air pollution and its control; water pollution and its control; agrochemicals and their effects; solid waste management; radioactive waste management; greenhouse effect and climate change impact and mitigation; ozone layer depletion; deforestation; exemplifying case study as success story addressing environmental issue(s).


    PRACTICAL 

     A: List of Experiments

    1. Study the presence of suspended particulate matter in air at two widely different sites.

    2. Study the plant population density by quadrat method.

    3. Study the plant population frequency by quadrat method.

     

    B. Study/Observer of the following (spotting)

    1. Pollen germination on stigma through a permanent slide or scanning electron

    micrograph.

    2. Mendelian inheritance using seeds of different colour/sizes of any plant.

    3. Controlled pollination - emasculation, tagging and bagging.

     

     

    CBSE class 12 syllabus Computer Science

    Chapters

    Deleted Portion

    Unit I: Computational Thinking and Programming – 2

     

    Recursion – simple algorithms with recursion : print a message forever, sum of first nnatural numbers, factorial, Fibonacci numbers, recursion on arrays : binary search

    Idea of efficiency : performance measurement in terms of the number of operations.

    Data-structures: Lists as covered in Class XI, Stacks – Push, Pop using a list, Queues – Insert, Delete using a list. (One of the data structure Stack or Queue. Note : While setting the question paper a students will have an option between Stack and Queue.)

    Unit II: Computer Networks

     

    Web Scripting Client side (VB Script, Java Script, PHP) and Server side (ASP, JSP, PHP), Web 2.0 (for social networking)

    E-commerce payment transactions using online banking, mobile banking, payment apps

    and services.

    Unit III: Database Management

     

    CREATE TABLE, DROP TABLE, ALTER TABLE, UPDATE ....SET, INSERT, DELETE

     

     


    1. Suggested Practical List:  

    • Python Programming
    • Recursively find the factorial of a natural number
    • Write a recursive code to find the sum of all elements of a list.
    • Write a recursive code to compute the nth Fibonacci number

     

     All the best!!

     


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