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Syllabus of Chemistry NEB Grade 12

Physical Chemistry: 40 teaching hours





Physical Chemistry: 40 teaching hours



Unit-1. Volumetric Analysis     :  8 teaching hrs


- Introduction to gravimetric analysis, volumetric analysis and equivalent weight ;

- Relationship between equivalent weight, atomic weight and valency ;

- Equivalent weight of compounds (acid, base, salt, oxidizing and reducing agents) ;

- Concentration of solution and its units in terms of : Percentage, g/L , molarity, molality, normality and formality, ppm and ppb ;

- Primary and secondary standard substances ;

- Law of equivalence and normality equation ;

- Titration and its types: Acid-base titration, redox titration ( related numerical problems)

Unit 2. Ionic Equilibrium :      10 hrs

- Introduction to Acids and Bases ;

- Limitation of Arrhenius concepts of acids and bases ;

 - Bronsted –Lowry definition of acids and bases ;

Relative strength of acids and bases ;

Conjugate acid –base pairs ;

- Lewis definition of acids and bases ;

Ionization of weak electrolyte (Ostwald’s dilution law) ;

- Ionic product of water(Kw) ;

- Dissociation constant of acid and base, (Ka& Kb) ;

- Concept of pKa and pKb ;

pH value: pH of strong and weak acids, pH of strong and weak bases ;

- Solubility and solubility product principle ;

- Common Ion effect ;

- Application of solubility product principle and common ion effect in precipitation reactions ;

- Buffer solution and its application ;

- Indicators and selection of indicators in acid base titration;

Types of salts: Acidic salts, basic salts, simple salts, complex salts (introduction and examples) ;

- Hydrolysis of salts : Salts of strong acid and strong base , Salts of weak acid and strong base , Salts of weak base and strong acid (solving related numerical problems)

Unit 3. Chemical Kinetics       : 7 hrs

- Introduction ;

- Rate of reactions: Average and instantaneous rate of reactions ;

- Rate law and its expressions ;

- Rate constant and its unit and significance;

- Order and molecularity ;

Integrated rate equation for zero and first order reaction ;

- Half-life of zero and first order reactions ; 

-Collision theory, concept of activation energy and activated complex ;

 - Factors affecting rate of reactions: Effect of concentration, temperature (Arrhenius Equation) and effect of catalyst (energy profile diagram) ;

- Catalysis and types of catalysis: homogeneous, heterogeneous and enzyme catalysis

 (solving related numerical problems based on rate, rate constant and order of zero and first order reactions)

Unit 4. Thermodynamics       :   8 hrs

- Introduction ;

Energy in chemical reactions ;

- Internal energy ;

- First law of thermodynamics ;

- Enthalpy and enthalpy changes: Endothermic and exothermic processes) ;

- Enthalpy of reaction, enthalpy of solution, enthalpy of formation, enthalpy of combustion ;

Laws of thermochemistry (Laplace Law and Hess’s law) ;

Entropy and spontaneity ; 

- Second law of thermodynamics ;

Gibbs’ free energy and prediction of spontaneity ;

- Relationship between ∆G and equilibrium constant (Solving related numerical problems)

Unit 5. Electrochemistry    :   7 hrs

- Electrode potential and standard electrode potential ;

 - Types of electrodes: Standard hydrogen electrode and calomel electrodes ;

-  Electrochemical series and its applications ;

- Voltaic cell: Zn-Cu cell, Ag- Cu cell ;

- Cell potential and standard cell potential ;

- Relationship between cell potential and free energy ;

- Commercial batteries and fuel cells (hydrogen/oxygen)


Inorganic Chemistry : 20 teaching hours.


Unit 6.Transition Metals           :   5 hrs

- Introduction ;

-  Characteristics of transition metals ;

-  Oxidation states of transition metals ;

- Complex ions and metal complexes ;

- Shapes of complex ions ;

- d-orbitals in complex ions (simple explanation by crystal field theory) for octahedral complex ;

- Reasons for the colour of transition metal compounds ;

- Catalytic properties of transition metals

Unit 7. Studies of Heavy Metals        :  15 hrs

7.1 Copper : 

- Occurrence and extraction of copper from copper pyrite ;

-  Properties (with air, acids, aqueous ammonia and metal ions) and uses of copper ;

- Chemistry (preparation, properties and uses) of blue vitriol ;

- Other compounds of copper (red oxide and black oxide of copper) formula and uses only

 

7.2 Zinc :

-  Occurrence and extraction of zinc from zinc blende ;

- Properties (with air, acid, alkali, displacement reaction) and uses of zinc ;

- Chemistry (preparation, properties and uses) of white vitriol

 

7.3 Mercury : 

- Occurrence and extraction of mercury from cinnabar ;

- Properties of mercury ;

- Chemistry (preparation, properties and uses) of calomel and corrosive sublimate

 

7.4 Iron :

- Occurrence and extraction of iron ;

- Properties and uses of iron ;

- Manufacture of steel by Basic Oxygen Method and Open Hearth Process ;

- Corrosion of iron and its prevention

 

7.5 Silver : 

- Occurrence and extraction of silver by cyanide process ;

- Preparation and uses of silver chloride and silver nitrate.


Organic Chemistry : 55 teaching hours.


Unit 8. Haloalkanes        :  8 hrs

- Introduction ;

- Nomenclature, isomerism and classification of monohaloalkanes ;

-  Preparation of monohaloalkanes from alkanes, alkenes and alcohols ;

- Physical properties of monohaloalkanes ;

- Chemical properties, substitution reactions SN1 and SN2 reactions (basic concept only) ;

- Formation of alcohol, nitrile, amine, ether, thioether, carbylamines, nitrite and nitro alkane using haloalkanes ;

- Elimination reaction (dehydrohalogenation- Saytzeff’s rule), Reduction reactions, Wurtz reaction ;

- Preparation of trichloromethane from ethanol and propanone ;

- Chemical properties of trichloromethane: oxidation, reduction, action on silver powder, conc. nitric acid, propanone, and aqueous alkali.

Unit 9. Haloarenes     : 3 hrs

- Introduction ;

-  Nomenclature and isomerism of haloarenes ;

- Preparation of chlorobenzene from benzene and benzene diazonium chloride ;

- Physical properties ;

- Chemical properties : Low reactivity of haloarenes as compared to haloalkanes in term of nucleophilic substitution reaction , Reduction of chlorobenzene , Electrophilic substitution reactions , Action with Na (Fittig and Wurtz- Fittig reaction) ;

- Action with chloral ;

- Uses of haloarenes.

Unit 10. Alcohols         : 7 hrs

- Introduction ;

 - Nomenclature;

 - Isomerism and classification of monohydric alcohol ;

- Distinction of primary, secondary and tertiary alcohols by Victor Meyer’s Method ;

- Preparation of monohydric alcohols from Haloalkane, primary amines, and esters ;

- Industrial preparation alcohol from: oxo process, hydroboration-oxidation of ethene & fermentation of sugar ;

- Definition of common terms: Absolute alcohol, power alcohol, denatured alcohol (methylated spirit), rectified spirit; alcoholic beverage ;

- Physical properties monohydric alcohols ;

- Chemical properties of monohydric alcohols : Reaction with HX, PX3, PCl5, SOCl2 ;

- Action with reactive metals like Na, K, Li ;

- Dehydration of alcohols ;

- Oxidation of primary, secondary and tertiary alcohol with mild oxidizing agents like acidified KMnO4 or K2Cr2O;

- Catalyic dehydrogenation of 1⁰ and 2⁰ alcohol and dehydration of 3⁰ alcohol. ;

- Esterification reaction ;

- Test of ethanol.

 

Unit 11. Phenols       : 4 hrs

- Introduction and nomenclature ;

- Preparation of phenol from i. chlorobenzene ii. Diazonium salt and iii. benzene sulphonic acid ;

 - Physical properties of phenol ;

- Chemical properties : Acidic nature of phenol (comparison with alcohol and water) ;

- Action with NH3, Zn, Na, benzene diazonium chloride and phthalic anhydride ;

- Acylation reaction, Kolbe’s reaction, Reimer-Tiemann’s reaction ;

- Electrophilic substitution: nitration, sulphonation, brominaiton and Friedal-Craft’s alkylation ;

- Test of phenol: (FeCl3 test, aq. Bromine test & Libermann test) ;

- Uses of phenol .

 

Unit 12. Ethers        : 2 hrs

- Introduction ;

- Nomenclature, classification and isomerism of ethers ;

- Preparation of aliphatic and aromatic ethers from Williamson’s synthesis ;

- Physical properties of ether ;

- Chemical properties of ethoxyethane: action with HI , Conc. HCl, Conc. H2SO4, air and Cl2 ,

- Uses of ethers

 

Unit 13. Aldehydes and Ketones      : 10 hrs

- Introduction, nomenclature and isomerism ;

- Preparation of aldehydes and ketones from: Dehydrogenation and oxidation of alcohol, Ozonolysis of alkenes, Acid chloride, Gem dihaloalkane, Catalytic hydration of alkynes ;

 - Physical properties of aldehydes and ketones ;

- Chemical properties ;

 - Structure and nature of carbonyl group ;

- Distinction between aldehyde and ketones by using 2,4- DNP reagent, Tollen’s reagent, Fehling’s solution ;

- Addition reaction: addition of H2, HCN and NaHSO3 13.1.4.4 Action of aldehyde and ketone with ammonia derivatives; NH2OH, NH2-NH2, phenyl hydrazine, semicarbazide ;

- Aldol condensation ;

- Cannizzaro’s reaction ;

- Clemmensen’s reduction 13.1.4.8 Wolf-Kishner reduction ;

- Action with PCl5 and action with LiAlH4 ;

- Action of methanal with ammonia and phenol ;

- Formalin and its uses .

- Aromatic aldehydes and Ketones :

- Preparation of benzaldehyde from toluene and acetophenone from benzene ;

- Properties of benzaldehyde ;

- Perkin condensation ;

- Benzoin condensation ;

 - Cannizzaro’s reaction ;

- Electrophilic substitution reaction .

Unit 14. Carboxylic Acid and its Derivaties     : 9 hrs

- Aliphatic and aromatic carboxylic acids : Introduction, nomenclature and isomerism ;

- Preparation of monocarboxylic acids from: aldehydes, nitriles, dicarboxylic acid, sodium alkoxide and trihaloalkanes ;

- Preparation of benzoic acid from alkyl benzene ;

-  Physical properties of monocarboxylic acids ;

- Chemical properties: Action with alkalies, metal oxides, metal carbonates, metal bicarbonates, PCl3, LiAlH4 and dehydration of carboxylic acid ;

- Hell-Volhard-Zelinsky reaction ;

-  Electrophilic substitution reaction of benzoic acid bromination, nitration and sulphonation) ; Effect of constituents on the acidic strength of carboxylic acid ;

- Abnormal behaviour of methanoic acid

- Derivatives of Carboxylic acids (acid halides, amides, esters and anhydrides) : Preparation of acid derivatives from carboxylic acid ;

-  Comparative physical properties of acid derivatives ;

- Comparative chemical properties of acid derivatives (hydrolysis, ammonolysis, amines (RNH2), alcoholysis, and reduction only) ;

- Claisen condensation ;

- Hofmann bromamide reaction ;

- Amphoteric nature of amide ;

- Relative reactivity of acid derivatives.

 

Unit 15. Nitro Compounds        : 3 hrs

- Nitroalkanes : Introduction, nomenclature and isomerism ;

- Preparation from haloalkane and alkane ;

- Physical properties ; Chemical properties: Reduction ;

- Nitrobenzene : Preparation from benzene ;

- Physical properties ;

- Chemical properties : Reduction in different media ;

- Electrophilic substitution reactions (nitration, sulphonation & bromination) ;

- Uses of nitro-compounds .

Unit 16. Amines      : 7 hrs

- Aliphatic amines : Introduction, nomenclature, classification and isomerism ;

- Separation of primary, secondary and tertiary amines by Hoffmann’s method ;

- Preparation of primary amines from haloalkane, nitriles, nitroalkanes and amides ;

- Physical properties ;

- Chemical properties: basicity of amines, comparative study of basic nature of 10, 20 and 30 amines ;

- Reaction of primary amines with chloroform, conc. HCl, R-X, RCOX and nitrous acid (NaNO2 / HCl) ;

- Test of 10, 20 and 30 amines (nitrous acid test)

- Aromatic amine (Aniline) : Preparation of aniline from nitrobenzene, phenol ;

- Physical properties ;

- Chemical properties: basicity of aniline, comparison of basic nature of aniline with aliphatic amines and ammonia, alkylation, acylation, diazotization, carbylamine and coupling reaction, electrophilic substitution: Nitration sulphonation and bromination ;

 - Uses of aniline.

Unit 17. Organometallic Compounds       : 2 hrs

- Introduction, general formula and examples of organolithium, organocopper and organocadmium compounds ;

- Nature of Metal-Carbon bond ;

- Grignard reagent : Preparation (using haloalkane and haloarene) ;

- Reaction of Grignard reagent with water, aldehydes and ketones ( preparation of primary, secondary and tertiary alcohols), carbon dioxide, HCN, RCN, ester and acid chloride


Applied Chemistry :    13 teaching hours.


Unit 18. Chemistry in the Service of Mankind  : 4 hrs

- Polymers : Addition and condensation polymers ;

- Elastomers and fibres ;

- Natural and synthetic polymers ;

- Some synthetic polymers (polythene, PVC, Teflon, polystyrene, nylon and bakelite ;

- Dyes : Introduction;

- Types of dyes on the basis of structure and method of application;

- Drugs :Characteristics of drugs;

- Natural and synthetic drugs ;

-  Classification of some common drugs; Habit forming drugs and drug addiction ;

- Pesticides : Introduction to insecticides, herbicides and fungicides

Unit 19. Cement    : 4 hrs

- Introduction ; Raw materials for cement production ;

- Main steps in cement production (crushing and grinding, strong heating and final grinding) ;

- Types of cement- OPC and PPC ;

- Portland cement process with flow-sheet diagram ;

- Cement Industry in Nepal.

Unit 20. Paper and Pulp    :  3 hrs

- Introduction ;

- Raw materials ;

- Sources of raw materials;

- Stages in production of paper;

- Flow-sheet diagram for paper production ;

- Quality of paper.

Unit 21. Nuclear Chemistry and Applications of Radioactivity : 2 hrs

- Natural and artificial radioactivity ;

- Units of radioactivity;

- Nuclear reactions ;

- Nuclear fission and fusion reactions ;

-  Nuclear power and nuclear weapons ;

- Industrial uses of radioactivity ;

- Medical uses of radioactivity ;

- Radiocarbon dating ;

- Harmful effects of nuclear radiations 

The End.

 



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