Manipur State Board has published subject wise syllabus for this year Class 12 students in its official portal cohsem.nic.in Here we have published Class 12 COHSEM Syllabus 2023-24 for Chemistry subject. For more information regarding Council of Higher Secondary Education (COHSEM) Class 12 2023 Exam Date, Exam Pattern, Time, Date, How to prepare follow our website.
Board |
Council Of Higher Secondary Education (COHSEM) |
Topic |
Syllabus |
Subject |
Chemistry |
How to download Manipur Class 12 Syllabus 2024-25 – Chemistry?
- Step 1: Open your browser
- Step 2: Type cohsem.nic.in
- Step 3: Go to the Syllabus link active on the left panel of the home page of the website (Syllabus for Classes XI – XII).
- Step 4: Click on Class 12 Syllabus link 2024
Class 12 Chemistry
Units | Titles | No. of Periods | Marks |
I | Solutions | 18 | 25 |
II | Electrochemistry | 18 | |
III | Chemical Kinetics | 16 | |
IV | d- and f-Block elements | 18 | 15 |
V | Coordination compounds | 16 | |
VI | Haloalkanes and Haloarenes | 18 | 30 |
VII | Alcohols, Phenols and Ethers | 16 | |
VIII | Aldehydes, Ketones and Carboxylic acids | 18 | |
IX | Amines | 10 | |
X | Biomolecules | 12 | |
Total | 160 | 70 |
Unit I: Solutions
Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, colligative properties – relative lowering of vapour pressure, Raoult’s law, elevation of boiling point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass, van’t Hoff factor and calculations involving it.
Unit II: Electrochemistry
Electrochemical cells, Galvanic cells, EMF of a cell, tandard electrode potential, Nernst Equation, Relation between Gibbs energy change and EMF of a cell, Conductance of Electrolytic Solutions, Kohlrausch’s law, Electrolytic Cells and Electrolysis, Batteries, Fuel cells and corrosion.
Unit III: Chemical Kinetics
Rate of a reaction (average and instantaneous), factors affecting rates of reaction: concentration, temperature, catalyst; order and molecularity of reactions; 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, Arrhenious equation.
Unit IV: The d- and f- Block Elements
General introduction, electronic configuration, occurence 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.
Some application d- and f- Block elements.
Unit V: Coordination Compounds
Werner’s Theory of coordination Compound, Difinition of some important terms pertaining to Coordination Compounds, Nomenclature of Coordination compouds, isomerism in coordination compounds, Bonding in coordination compounds, Bonding in metal carbonyl, stability of coordination compounds and importance and application of coordination compounds.
Unit VI: Haloalkanes and Haloarenes
Haloalkanes: Classification, Nomenclature, nature of C-X bond, Method of preparation of Haloalkanes, physical and chemical properties, mechanism and stereochemical asoects of nucleophilic of substitution reactions.
Haloarenes: Nature of C-X bond, method of preparation of Haloarenes substitution reactions (directive influence of halogen for mono substituted compounds only) Uses and environmental effects of- dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons DDT.
Unit VII: Alcohols, Phenols and Ethers
Classification, Nomenclature and structures of functional groups, preparations, physical properties and reactions of alcohols and phenols, Mechanism of dehydration, some commercially important alcoholsmethanol and ethanol. Preparation, Physical properties and chemical reactions of Ethers.
Unit VIII: Aldehydes, Ketones and Carboxylic acids
Nomenclature and structure of carbonyl group, preparation of aldehydes and ketones, physical properties and chemical reactions, mechanism of nucleophitic addition, uses of aldehydes and ketones. Nomenclature and structure of carboxyl groups – Methods of Preparation of Carboxyclic acids, physical properties and chemical reactions, uses of carboxylic acids.
Unit IX: Amines:
Structure of Amines, classification and nomenclature of amines, preparation of amines, physical properties and chemical reactions, Methods of preparation of diazonium salts , physical properties, chemical reactions and its importance in synthesis of aromatic compounds.
Unit X: Biomolecules
Carbohydrates : Classification, Structure of glucose and fructose, monosaccharides, disaccharides (sucrose, lactose, maltose), D,L – configuration, polysaccharides, strach, glycogen, cellulose and importance of carbohydrates..
Protiens: Aminoacids and its classification, peptide bond and peptides, classification and structure of protein and denaturation of protein.
Enzymes: Mechanism of Enzyme action.
Vitamins: Classification and Importance of Vitamins.
Nucleic acids: Chemical compostion, function of nucleic acids.
Hormones: Its functions.
Chemistry (Practicals)
Evaluation Scheme for Exmamination | Marks | |
A | Volumetric Analysis | 10 |
B | Salt Analysis | 8 |
C | Content Based Experiment | 6 |
D | Class record and viva | 6 |
Total | 30 |
Practicals Syllabus
(A) Determination of concentration/molarity of KMnO4 solution by titrating it against a standard solution of:
(a) Oxalic acid,
(b) Ferrous ammonium sulphate (Students will be required to prepare standard solutions by weighing themselves)
B.) Qualitative Analysis:
Determination of one cation and one anion in a given salt.
(Note: Insoluble salts excluded)
C.) Content based experiment
(i) 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:
(i) Reaction of iodide ion with hydrogen peroxide at room temperature using different concentrations of iodide ions.
(ii) Reaction between potassium iodate KIO3 and sodium sulphite: (Na2SO3) using starch solution as indicator (clock reaction).
(ii) Thermo chemistry
Any one of the following experiments:
(a) Enthalpy of dissolution of copper sulphate or potassium nitrate.
(b) Enthalpy of neutralization of strong acid (HCl) and strong base (NaOH).
(c) Determination of enthalpy change during interaction (Hydrogen bond formation) between acetone and chloroform.
(iii) Electrochemistry
Variation of cell potential in Zn/Zn2+ || Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.
(iv) Chromatography
(i) Separation of pigments from extracts of leaves and flowers by paper chromatography and determination of Rf values.
(ii) Separation of constituents present in an inorganic mixture containing two cations only (constituents having wide difference in Rf values to be provided).
(v) Preparation of Inorganic Compounds
(a) Preparation of double salt of ferrous ammonium sulphate or potash alum.
(b) Preparation of potassium ferric oxalate;
(vi) Preparation of Organic Compounds
Preparation of any two of the following compounds
(i) Acetanilide;
(ii) Di-benzal acetone;
(iii) p-Nitro acetanilide;
(iv) Aniline yellow or 2-Naphthol aniline dye;
(v) Iodoform
(vii) Test for Functional Groups in Organic compounds
Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (primary) groups.
(viii) Characteristic tests of carbohydrates, fats and proteins in pure samples and their detection in given Food Stuffs.
Design of Question Paper
Here on this page we have uploaded Chemistry subject syllabus 2024. You can download the complete syllabus from the link mentioned below: