Chemistry Syllabus

Syllabus for Secondary and Higher Secondary Levels
Vocationale
Higher Secondary Stage is the most crucial stage of school education because at this stage specialised
discipline based, content oriented courses are introduced. Students reach this stage after 10 years of
general education and opt for Chemistry with a purpose of mostly for pursuing their career in basic
sciences or professional courses like medicines, engineering, technology and studying courses in applied
areas of science and technology at tertiary level. Therefore, at this stage, there is a need to provide
learners with sufficient conceptual background of Chemistry, which will make them competent to
meet the challenges of academic and professional courses after the higher secondary stage.
National Curriculum Framework for School Education – 2005 recommends a disciplinary approach
with appropriate rigour and depth with the care that syllabus is not heavy and at the same time it is
comparable to the international level. It emphasizes a coherent focus on important ideas within the
discipline that are properly sequenced to optimize learning. It recommends that theoretical component
of Higher Secondary Science should emphasize on problem solving methods and the awareness of
historical development of key concepts of science be judiciously integrated into content. The present
exercise of syllabus development in Chemistry at Higher Secondary Stage is based on this framework.
Salient features of the present syllabus are thus:
• Some background of Chemistry from secondary stage is assumed; however, no specific
knowledge of topics in Chemistry is pre-supposed.
• The course is self-contained and broadly covers fundamental concepts of Chemistry.
• Attempt has been made to see discipline of Chemistry does not remain only the science of
facts but becomes related to modern applications in the world around us.
• The syllabus provides logical sequencing of the ‘Units’ of the subject matter with proper
placement of concepts with their linkages for better understanding.
• Emphasis has been on promoting process – skills, problem solving abilities and applications
of concepts of Chemistry useful in real life situation for making learning of Chemistry more
relevant, meaningful and interesting.
• An effort has been made on the basis of feedback, to remove repetition besides reducing the
content by suitably integrating the different content areas.
• Practical syllabus has two components. There are core experiments to be undertaken by the
students in the classroom and will be part of examination while each student will carry out one
investigatory project and submit the report for the examination.
With this background, the Chemistry curriculum at the higher secondary stage attempts to
• promote understanding of basic principles in Chemistry while retaining the excitement in Chemistry;
• develop an interest in students to study Chemistry as discipline;
• strengthen the concepts developed at the secondary stage and to provide firm foundation for
further learning of Chemistry at tertiary level more effectively;
develop positive scientific attitude, and appreciate contribution of Chemistry towards the
improvement of quality of human life;
• develop problem solving skills and nurture curiosity, aesthetic sense and creativity;
• inculcate values of honesty, integrity, cooperation, concern for life and preservation of the environment;
• make the learner realise the interface of Chemistry with other disciplines of science such as
Physics, Biology, Geology, etc;
• equip students to face challenges related to health, nutrition, environment, population, whether
industries and agriculture.
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Syllabus
for
Secondary
and
Higher
Secondary
Levels
Theory Total Periods 180
Unit I: Some Basic Concepts of Chemistry (Periods 14)
General Introduction: Importance and scope of chemistry.
Historical approach to particulate nature of matter, laws of chemical combination, Dalton’s atomic
theory: concept of elements, atoms and molecules.
Atomic and molecular masses. Mole concept and molar mass; percentage composition and empirical
and molecular formula; chemical reactions, stoichiometry and calculations based on stoichiometry.
Unit II: Structure of Atom (Periods 16)
Discovery of electron, proton and neutron; atomic number, isotopes and isobars. Thompson’s
model and its limitations, Rutherford’s model and its limitations, Bohr’s model and its limitations,
concept of shells and subshells, dual nature of matter and light, de Broglie’s relationship, Heisenberg
uncertainty principle, concept of orbitals, quantum numbers, shapes of s, p, and d orbitals, rules
for filling electrons in orbitals – Aufbau principle, Pauli exclusion principle and Hund’s rule,
electronic configuration of atoms, stability of half filled and completely filled orbitals.
Unit III: Classification of Elements and Periodicity in Properties (Periods 8)
Significance of classification, brief history of the development of periodic table,
modern periodic law and the present form of periodic table, periodic
trends in properties of elements – atomic radii, ionic radii,
inert gas radii, ionization enthalpy, electron gain enthalpy,
electronegativity, valence.
Unit IV: Chemical Bonding and Molecular Structure
(Periods 16)
Valence electrons, ionic bond, covalent bond, bond parameters,
Lewis structure, polar character of covalent bond, covalent character
of ionic bond, valence bond theory, resonance, geometry of
covalent molecules, VSEPR theory, concept of hybridization
involving s, p and d orbitals and shapes of some simple molecules,
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Secondary
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molecular orbital theory of homonuclear diatomic molecules (qualitative idea only),
hydrogen bond.
Unit V: States of Matter: Gases and Liquids (Periods 14)
Three states of matter, intermolecular interactions, type of bonding, melting and boiling points,
role of gas laws in elucidating the concept of the molecule, Boyle’s law, Charles’ law, Gay Lussac’s
law, Avogadro’s law, ideal behaviour, empirical derivation of gas equation, Avogadro’s number,
ideal gas equation, deviation from ideal behaviour, liquefaction of gases, critical temperature.
Liquid State – Vapour pressure, viscosity and surface tension (qualitative idea only, no
mathematical derivations).
Unit VI: Thermodynamics (Periods 16)
Concepts of system, types of systems, surroundings, work, heat, energy, extensive and intensive
properties, state functions.
First law of thermodynamics – internal energy and enthalpy, heat capacity and specific heat,
measurement of Δ U and Δ H, Hess’s law of constant heat summation, enthalpy of: bond dissociation,
combustion, formation, atomization, sublimation, phase transition, ionization, and dilution.
Introduction of entropy as a state function, free energy change for spontaneous and non-spontaneous
process, equilibrium.
Unit VII: Equilibrium (Periods 16)
Equilibrium in physical and chemical processes, dynamic nature of equilibrium, law of mass
action, equilibrium constant, factors affecting equilibrium – Le Chatelier’s principle; ionic
equilibrium – ionization of acids and bases, strong and weak electrolytes, degree of ionization,
concept of pH. Hydrolysis of salts (elementary idea), buffer solutions, solubility product, common
ion effect (with illustrative examples).
Unit VIII: Redox Reactions (Periods 6)
Concept of oxidation and reduction, redox reactions,
oxidation number, balancing redox reactions, applications
of redox reactions.
Unit IX: Hydrogen (Periods 8)
Position of hydrogen in periodic table, occurrence, isotopes, preparation, properties and uses of
hydrogen; hydrides – ionic, covalent and interstitial; physical and chemical properties of water,
heavy water; hydrogen peroxide – preparation, reactions and structure; hydrogen as a fuel.
Unit X: s-Block Elements (Alkali and Alkaline Earth Metals) (Periods 14)
Group 1 and Group 2 elements:
General introduction, electronic configuration, occurrence, anomalous properties of the first
element of each group, diagonal relationship, trends in the variation of properties (such as ionization
enthalpy, atomic and ionic radii), trends in chemical reactivity with oxygen, water, hydrogen and
halogens; uses.
Preparation and properties of some important compounds:
Sodium carbonate, sodium chloride, sodium hydroxide and sodium hydrogen carbonate, biological
importance of sodium and potassium.
CaO, CaCO 3 , and industrial use of lime and limestone, biological importance of Mg and Ca.
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Syllabus
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Secondary
Levels
Unit XI: Some p-Block Elements (Periods 16)
General Introduction to p-Block Elements
Group 13 elements: General introduction, electronic configuration, occurrence, variation of properties,
oxidation states, trends in chemical reactivity, anomalous properties of first element of the group;
Boron – physical and chemical properties, some important compounds: borax, boric acids,
boron hydrides. Aluminium: uses, reactions with acids and alkalies.
Group 14 elements: General introduction, electronic configuration, occurrence, variation of
properties, oxidation states, trends in chemical reactivity, anomalous behaviour of first element.
Carbon – catenation, allotropic forms, physical and chemical properties; uses of some important
compounds: oxides.
Important compounds of silicon and a few uses: silicon tetrachloride , silicones, silicates and
zeolites.
Unit XII: Organic Chemistry – Some Basic Principles and Techniques (Periods 14)
General introduction, methods of purification, qualitative and quantitative analysis, classification
and IUPAC nomenclature of organic compounds.
Electronic displacements in a covalent bond: inductive effect, electromeric effect, resonance
and hyper conjugation.
Homolytic and heterolytic fission of a covalent bond: free radicals, carbocations, carbanions;
electrophiles and nucleophiles, types of organic reactions
Unit XIII: Hydrocarbons (Periods 16)
Classification of hydrocarbons
Alkanes: Nomenclature, isomerism, conformations (ethane only), physical properties, chemical
reactions including free radical mechanism of halogenation, combustion and pyrolysis.
Alkenes: Nomenclature, structure of double bond (ethene), geometrical isomerism, physical
properties, methods of preparation; chemical reactions: addition of hydrogen, halogen, water,
hydrogen halides (Markovnikov’s addition and peroxide effect), ozonolysis, oxidation, mechanism
of electrophilic addition.
Alkynes: Nomenclature, structure of triple bond (ethyne), physical properties, methods of
preparation, chemical reactions: acidic character of alkynes, addition reaction of – hydrogen,
halogens, hydrogen halides and water.
Aromatic hydrocarbons: Introduction, IUPAC nomenclature; Benzene: resonance, aromaticity;
chemical properties: mechanism of electrophilic substitution – nitration sulphonation, halogenation,
Friedel Craft’s alkylation and acylation; directive influence of functional group in mono-substituted
benzene; carcinogenicity and toxicity.
Unit XIV: Environmental Chemistry (Periods 6)
Environmental pollution : Air, water and soil pollution, chemical reactions in atmosphere, smogs,
major atmospheric pollutants; acid rain, ozone and its reactions, effects of depletion of ozone
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layer, greenhouse effect and global warming – pollution due to industrial wastes; green chemistry
as an alternative tool for reducing pollution, strategy for control of environmental pollution.
Practicals Total Periods 60
Micro-chemical methods are available for several of the practical experiments. Wherever possible
such techniques should be used.
A. Basic Laboratory Techniques (Periods 2)
1. Cutting glass tube and glass rod
2. Bending a glass tube
3. Drawing out a glass jet
4. Boring a cork
B. Characterisation and Purification of Chemical Substance (Periods 6)
1. Determination of melting point of organic compound.
2. Determination of boiling point of organic compound.
3. Crystallization involving impure sample of any one of the following: Alum, Copper
sulphate, Benzoic acid.
C. Experiments Related to pH Change (Periods 6)
(a) Any one of the following experiments:
• Determination of pH of some solutions obtained from fruit juices, solutions of known
and varied concentrations of acids, bases and salts using pH paper or universal indicator.
• Comparing the pH of solutions of strong and weak acid of same concentration.
• Study the pH change in the titration of a strong acid with a strong base using universal
indicator.
(b) Study of pH change by common-ion effect in case of weak acids and weak bases.
D. Chemical Equilibrium (Periods 4)
One of the following experiments:
(a) Study the shift in equilibrium between ferric ions and thiocynate ions by increasing/
decreasing the concentration of either ions.
(b) Study the shift in equilibrium between [Co (H 2 O)6 ]
2+
and chloride ions by changing the
concentration of either of the ions.
E. Quantitative Estimation (Periods 16)
• Using a chemical balance.
• Preparation of standard solution of oxalic acid.
• Determination of strength of a given solution of sodium hydroxide by titrating it against
standard solution of oxalic acid.
• Preparation of standard solution of sodium carbonate.
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Secondary
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XII
• Determination of strength of a given solution of hydrochloric acid by titrating it against
standard sodium carbonate solution.
F. Qualitative Analysis (Periods 16)
Determination of one anion and one cation in a given salt
Cations – Pb 2+ , Cu 2+ , As 3+ , Al 3+ , Fe 3+ , Mn 2+ , Ni 2+ , Zn 2+ , Co 2+ , Ca 2+ , Sr 2+ , Ba 2+ ,
Mg 2+ , NH
+
4
Anions – CO
2–
3 , S
2–
, SO
2–
3 , SO
2–
4 , NO
–
2 , NO
–
3 , Cl
–
, Br
–
, I
–
, PO
3–
4 , C2O
2–
4 CH3COO
–
(Note : Insoluble salts excluded)
Project (Periods 10)
Scientific investigations involving laboratory testing and collecting information from other sources.
A few suggested projects
• Checking the bacterial contamination in drinking water by testing sulphide ions.
• Study of the methods of purification of water.
• Testing the hardness, presence of iron, fluoride, chloride etc. depending upon the regional
variation in drinking water and the study of causes of presences of these ions above
permissible limit (if any)
• Investigation of the foaming capacity of different washing soaps and the effect of addition of
sodium carbonate on them.
• Study of the acidity of different samples of the tea leaves.
• Determination of the rate of evaporation of different liquids.
• Study of the effect of acids and bases on the tensile strength of fibers.
• Analysis of fruit and vegetable juices for their acidity.
Note: Any other investigatory project, which involves about 10 periods of work, can be chosen
with the approval of the teacher.
CHEMISTRY CLASS XII
Theory Total Periods 60
Unit I: Solid State (Periods 12)
Classification of solids based on different binding forces: molecular, ionic, covalent and metallic
solids, amorphous and crystalline solids (elementary idea), unit cell in two dimensional and three
dimensional lattices, 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.
Syllabus
for
Secondary
and
Higher
Secondary
Levels
28
Unit II: Solutions (Periods 12)
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, elevation of
B.P., depression of freezing point, osmotic pressure, determination of molecular masses using
colligative properties, abnormal molecular mass.
Unit III: Electrochemistry (Periods 14)
Redox reactions; conductance in electrolytic solutions, specific and molar conductivity variations
of conductivity with concentration, Kohlrausch’s 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, fuel
cells; corrosion.
Unit IV: Chemical Kinetics (Periods 12)
Rate of a reaction (average and instantaneous), factors affecting rates of reaction: 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).
Unit V: Surface Chemistry (Periods 8)
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
and macromolecular colloids; properties of colloids; Tyndall effect, Brownian movement,
electrophoresis, coagulation; emulsions – types of emulsions.
Unit VI: General Principles and Processes of Isolation of Elements (Periods 8)
Principles and methods of extraction: concentration, oxidation, reduction electrolytic method and
refining; occurrence and principles of extraction of aluminium, copper, zinc and iron.
Unit VII: p-Block Elements (Periods 14)
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); Phosphorous – allotropic forms; compounds of phosphorous: preparation and properties
of phosphine, halides (PCl 3 , PCl 5 ) 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; simple
oxides; ozone. Sulphur – allotropic forms; compounds of sulphur: preparation, properties and
uses of sulphur dioxide; sulphuric acid: industrial process of manufacture, properties and uses,
oxoacids of sulphur (structures only).
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Syllabus
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and
Higher
Secondary
Levels
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
(structures only).
Group 18 elements: General introduction, electronic configuration, occurrence, trends in physical
and chemical properties, uses.
Unit VIII: d and f Block Elements (Period 14)
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 K 2 Cr 2 O 7 and KMnO4.
Lanthanoids: electronic configuration, oxidation states, chemical reactivity and lanthanoid
contraction.
Actinoids: Electronic configuration, oxidation states.
Unit IX: Coordination Compounds (Period 12)
Coordination compounds: Introduction, ligands, coordination number, colour, magnetic properties
and shapes, IUPAC nomenclature of mononuclear coordination compounds, bonding;
isomerism, importance of coordination compounds (in qualitative analysis, extraction of
metals and biological systems).
Unit X: Haloalkanes and Haloarenes (Periods 12)
Haloalkanes: Nomenclature, nature of C-X bond, physical and chemical properties, mechanism
of substitution reactions.
Haloarenes: Nature of C-X bond, substitution reactions (directive influence of halogen for
monosubstituted compounds only).
Uses and environmental effects of – dichloromethane, trichloromethane, tetrochloromethane,
iodoform, freons, DDT.
Unit XI: Alcohols, Phenols and Ethers (Periods 12)
Alcohols: Nomenclature, methods of preparation, physical and chemical properties (of primary
alcohols only); identification of primary, secondary and tertiary alcohols;
mechanism of dehydration, uses, some important compounds –
methanol and ethanol.
Phenols: Nomenclature, methods of preparation, physical and
chemical properties, acidic nature of phenol, electrophillic
substitution reactions, uses of phenols.
Ethers: Nomenclature, methods of preparation, physical
and chemical properties, uses.
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Secondary
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Unit XII: Aldehydes, Ketones
and Carboxylic Acids (Periods 12)
Aldehydes and Ketones: Nomenclature,
nature of carbonyl group, methods
of preparation, physical and chemical properties,
and mechanism of nucleophilic 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 (Periods 10)
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: Biomolecules (Periods 12)
Carbohydrates: Classification (aldoses and ketoses), monosaccharides (glucose and fructose),
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.
Vitamins: Classification and functions.
Nucleic Acids: DNA and RNA .
Unit XV: Polymers (Periods 8)
Classification: Natural and synthetic, methods of polymerization (addition and condensation),
copolymerization. Some important polymers: natural and synthetic like polythene, nylon, polyesters,
bakelite, rubber.
Unit XVI: Chemistry in Everyday Life (Periods 8)
1. Chemicals in medicines – analgesics, tranquilizers, antiseptics, disinfectants, antimicrobials,
antifertility drugs, antibiotics, antacids, antihistamines.
2. Chemicals in food – preservatives, artificial sweetening agents.
3. Cleansing agents – soaps and detergents, cleansing action.
Practicals Total Periods 60
Microchemical methods are available for several of the practical experiments. Wherever possible
such techniques should be used.
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Syllabus
for
Secondary
and
Higher
Secondary
Levels
Surface Chemistry (Periods 5)
(a) Preparation of one lyophilic and one lyophobic sol.
Lyophilic sol : starch, egg albumin and gum.
Lyophobic sol : aluminium hydroxide, ferric hydroxide, arsenious sulphide.
(b) Dialysis of sol prepared in (a) above.
(c) Study of the role of emulsifying agent in stabilizing the emulsions of different oils.
B. Chemical Kinetics (Periods 4)
(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
concentration of iodide ions.
(ii) Reaction between potassium iodate (KIO 3 ) and sodium sulphite (Na 2 SO 3 ) using
starch solution as indicator (clock reaction).
C. Thermochemistry (Periods 4)
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.
D. Electrochemistry (Periods 2)
Variation of cell potential in Zn/Zn 2+ //Cu 2+ /Cu with change in concentration of electrolytes
(CuSO 4 or ZnSO 4 ) at room temperature.
E. Chromatography (Periods 2)
(a) Separation of pigments from extracts of leaves and flowers by paper chromatography
and determination of R f values.
(b) Separation of constituents present in an inorganic mixture containing two cations only
(constituents having wide difference in R f values to be provided).
F. Preparation of Inorganic Compounds (Periods 4)
(a) Preparation of double salt of ferrous ammonium sulphate or potash alum.
(b) Preparation of potassium ferric oxalate.
G. Preparation of Organic Compounds (Periods 2)
Preparation of any one of the following compounds:
(a) Acetanilide
(b) Di-benzal acetone
Syllabus
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Secondary
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32
(c) p-Nitroacetanilide.
(d) Aniline yellow or 2-Napththol aniline dye.
H. Test for the Functional Groups Present in Organic Compounds (Periods 5)
Unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic and amino (primary) groups.
I. Study of Carbohydrates, Fats and Proteins in Pure Form and Detection of their
Presence in given Food Stuffs (Periods 4)
J. Determination of Concentration/Molarity of KMnO 4 Solution by Titrating it
against a Standard Solution of (Periods 8)
(a) Oxalic acid
(b) Ferrous ammonium sulphate
(Students will be required to prepare standard solutions by weighing themselves).
K. Qualitative Analysis (Periods 10)
Determination of one anion and one cation in a given salt.
Cations – Pb 2+ , Cu 2+ , As 3+ , Al 3+ , Fe 3+ , Mn 2+ , Ni 2+ , Zn 2+ , Co 2+ , Ca 2+ , Sr 2+ , Ba 2+ ,
Mg 2+ , NH
+
4
Anions – CO
2–
3 , S
2–
, SO
2–
3 , SO
2–
4 , NO
–
2 , NO
–
3 , Cl
–
, Br
–
, I
–
, PO
3–
4 , C2 O
2–
4 CH3COO
–
(Note : Insoluble salts excluded)
Project (Periods 10)
Scientific investigations involving laboratory testing and collecting information from other sources.
A few suggested projects
• Study of presence of oxalate ions in guava fruit at different stages of ripening.
• Study of quantity of casein present in different samples of milk.
• Preparation of soybean milk and its comparison with the natural milk with respect to curd
formation, effect of temperature, etc.
• Study of the effect of potassium bisulphate as food preservative under various conditions
(temperature, concentration, time etc.)
• Study of digestion of starch by salivary amylase and effect of pH and temperature on it.
• Comparative study of the rate of fermentation of following materials: wheat flour, gram
flour, potato juice, carrot juice etc.
• Extraction of essential oils present in Saunf (aniseed), Ajwain (carum), Illaichi (cardamom).
• Study of common food adulterants in fat, oil, butter, sugar, turmeric powder, chilli powder
and pepper.
Note: Any other investigatory project, which involves about 10 periods of work, can be chosen
with the approval of the teacher.