WBCHSE syllabus of chemistry?

The syllabus of Class 12 Chemistry Subject as prescribed by the West Bengal Council of Higher Secondary Education (WBCHSE) is as follows:


Syllabus of WBCHSE of Class 12 Chemistry

Unit I: Solid State

Classification of solids based on different binding forces: molecular, ionic, covalent and metallic solid, amorphous and crystalline solids (elementary idea), unit cell in two dimensional and three dimensional lattices, packing efficiency, calculation of density of unit cell, packing in solids, voids, number of atoms per unit cell in a cubic unit cell, point defects, electrical and magnetic properties. Band theory of metals, conductors, semiconductors and insulators and n & p-type semiconductors

Unit II: Solutions

Types of solutions, expression of concentration of solution of solids in liquids, solubility of gases in liquids, solid solutions, colligative properties relative lowering of vapour pressure, Raoults law, elevation of boiling point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass, vant Hoff factor and calculations involving it.

Unit III: Electrochemistry

Red ox reactions, conductance in electrolytic solutions, specific and molar conductivity, variations of conductivity with concentration, Kohlrauschs law, electrolysis and laws of electrolysis (elementary idea), dry cell electrolytic cells and Galvanic cells; lead accumulator, EMF of a cell, standard electrode potential, Nernst equation and its application to chemical cells. Reaction between Gibbs energy change and emf of a cell, fuel cells: corrosion.

Unit IV: Chemical Kinetics

Rate of a reaction (average and instantaneous), factors affecting rates of reactions; concentration, temperature, catalyst; order and molecularity of a reaction; rate law and specific rate constant, integrated rate equations and half life (only for zero and first order reactions); concept of collision theory (elementary idea, no mathematical treatment), activation energy, Arrhenius equation.

Unit V: Surface Chemistry

Adsorption physisorption and chemisorption; factors affecting adsorption of gases on solids; catalysis; homogenous and heterogeneous, activity and selectivity; enzyme catalysis; colloidal state, distinction between true solutions, colloids and suspensions; lyophillic, lyophobic, multimolecular colloids; properties of collioids; tyndall effect, Brownian movement, electro phoresis, coagulation; emulsion types of emulsions. Elementary idea of nanomaterials.

Unit VI: General Principles and Processes of Isolation of Elements

Principles and methods of extraction concentration, oxidation, reduction electrolysis method and refining; occurrence and principles of extraction of aluminium, copper, zinc and iron.

Unit VII- Block Elements

Group 15 elements: general introduction, electronic configuration, occurrence, oxidation states, trends in physical and chemical properties; nitrogen preparation, properties and uses; compounds of nitrogen; preparation and properties of ammonia and nitric acid, oxides of nitrogen (structure only); Phosphorus allotropic forms; compounds of phosphorus; preparation and properties of phosphine, halides (PCL3, PCL5) and oxoacids (elementary idea only).

Group 16 elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; dioxygen; preparation, properties and uses; classification of oxides; ozone, sulphur allotropic forms;

Compounds of sulphur dioxide; sulphuric acid: industrial process of manufacture, properties and uses, other oxides and oxoacids of sulphur (structures only).

Group 17 elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; compounds of halogens; preparation, properties and uses of chlorine and hydrochloric acid, interhalogen compounds, oxoacids of halogens (structure only).

Group 18 elements: General introduction, electronic configuration. Occurrence, trends in physical and chemical properties uses.

Unit VIII: d and f Block Elements

General introduction electronic configuration, occurrence and characteristics of transition metals, general trends in properties of the first row transition metals metallic character, ionization enthalpy, oxidation states, ionic radii, colour, catalytic property, magnetic properties, interstitial compounds, alloy formation. Preparation and properties of K2Cr2O7 and KMnO4.

Lanthanoids electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction and its consequences.

Actinoids Electronic configuration, oxidation states and comparison with lanthanoids.

Unit IX: Coordination Compounds

Coordination compounds Introduction, Ligands, coordination number, colour, magnetic properties and shape, IUPAC nomenclature of mononuclear coordination compounds. Bonding (Werners theory, VBT and CFT); structural and stereo isomerism, importance of coordination compounds (in qualitative inclusion of analysis, extraction of metals and biological systems)

Unit X: Haloalkanes and Haloarenes

Haloalkanes:

Nomenclature, nature of C-X bond, physical and chemical properties, mechanism of substitution reactions Stability of carbonations, R-S and d-I configurations

Haloarenes:

Nature of C-X bond, substitutions reactions (directive influence of halogen for monosubstituted compound only, stability of carbocations R-S and d-I configurations)

Uses and environmental effects of dichloromethane, trichloromethane, tetrachloromethane, iododorm, freons, DDT

Unit XI: Alcohols, phenols and Ethers

Alcohols: Nomenclature, methods of preparation, physical and chemical properties (of primary alcohols only); identification of primary, secondary and tertiary alcohols; mechanism of dehydration, uses of methanol and ethanol.

Phenols: Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophillic substitution reactions, uses of phenol.

Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

Unit XII: Aldehydes, Ketones and Carboxylic Acids

Aldehydes and Ketones: Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties, mechanism of nucleophillic addition, reactivity of alpha hydrogen in aldehydes; uses.

Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties, uses.

Unit XIII: Organic compounds containing Nitrogen

Nitro compounds: General methods of preparation and chemical reactions.

Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines.

Cyanides and Isocyanides will be mentioned at relevant places in context.

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

Unit XIV: Bio molecules

Carbohydrates Classification (aldoses and Ketoses), monosaccharides (glucose and fructose), D-L configuration, oligosaccharides (sucrose, lactose,maltose), polysaccharides (starch, cellulose, glycogen); importance.

Proteins Elementary idea of α amino acids, peptide bond, polypeptides, proteins, primary structure, secondary structure, tertiary structure and quaternary structure (qualitative idea only), denaturation of proteins; enzymes.

Lipids and hormones, their classification and functions

Vitamins: Classification and functions.

Nucleic Acids: DNA & RNA.

Unit XV: Polymers

Classification natural and synthetic, methods of polymerization (addition and Condensation), copolymerization. Some important polymers: natural and synthetic like poly, nylon, polyesters, Bakelite, rubber, biodegradable and non-biodegradable polymers.

Unit XVI: Chemistry in Everyday Life

Chemicals in medicines- analgesics, tranquilizers, antiseptics, disinfectants, antimicrobials, anti fertility drugs, antibiotics, antacids, antihistamines, antioxidants
Chemicals in food preservatives, artificial, sweetening agents
Cleansing agents soaps and detergents, cleansing action


Class 12 Chemistry Practical syllabus

Evaluation Scheme for Examination Marks
Volumetric analysis 10
Salt Analysis 08
Content Based Experiment 06
Class Record, Viva and Project work 06
Total 30
Surface Chemistry.

a) Preparation one lyophilic and one lyophobic sol. Lyophilic sol starch albumin and gum, Lyophobic sol aluminium hydroxide, ferric hydroxide, arsenious sulphide.

b) Study of the role of emulsifying agents in stabilizing the emulsions of different oils.

Chemical kinetics

a) Effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid.

b) Study of reaction rates of any one of the following:

Reaction of iodide ion with hydrogen peroxide at room temperature using different concentrations of iodide ions

Reaction between potassium iodide, KIO3 and sodium sulphate: (Na2So3) using starch solution as indicator (clock reaction).

Thermo chemistry

Any of the following experiments

Enthalpy of dissolution copper sulphate or potassium nitrate.
Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH)
Determination of enthalpy change during interaction (hydrogen bond formation) between acetone and chloroform
Electro chemistry

Variation of cell potential in Zn/Zn2+//Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.

Chromatography

Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf Values.
Separation of constituents present in an inorganic mixture containing two cations only (constituents having large difference in Rf values to be provided).
Preparation of Inorganic Components

Preparation of double salt of ferrous ammonium sulphate or potash alum
Preparation of potassium ferric oxalate
Preparation of Organic compounds

Preparation of any two of the following compounds

Acetanilide
Di benzal acetone
p-Nitroacetanilide
Aniline yellow or 2- Napthal aniline dye
Iodoform
Tests for the functional groups present in organic compounds:

Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (primary) groups

Characteristic test of carbohydrates, fats and proteins in pure samples and their detection in given food stuffs.

Determination of concentration/ minority of KMnO4 solution by titrating it against a standard solution of:

Oxalic acid
Ferrous ammonium sulphate (students will be requied to prepare standard solution by weighing themselves)
Qualitative analysis

Determination of one cation and one anion in a given salt

Cations Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+, Ni2+, Zn2+, Co2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4+

Anions CO32-, S2-, SO32-,NO2-,Cl, Br,l-, PO43- ,C2O42-, CH3COO-

(Note; Insoluble salts excluded)

Project work- where feasible may include

Model preparation
Investigatory project
Science exhibits
Participation in science fairs
Testing of purity of food articles like butter, pulse and milk etc.

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Answered By StudyChaCha Member