CHEMISTRY (862)
CLASS XII
There will be two papers in the subject: Paper II: Practical: 3 hours ... 15 marks
Paper I: Theory - 3 hours ... 70 marks Project Work … 10 marks
Practical File … 5 marks
PAPER I - THEORY: 70 Marks
S.No. UNIT TOTAL WEIGHTAGE
1. Solutions
Physical Chemistry
2. Electrochemistry
25 Marks
3. Chemical Kinetics
4. d -and f -Block Elements Inorganic Chemistry
5. Coordination Compounds 14 Marks
6. Haloalkanes and Haloarenes
7. Alcohols, Phenols and Ethers
Organic Chemistry
8. Aldehydes, Ketones and Carboxylic Acids
31 Marks
9. Organic Compounds containing Nitrogen
10. Biomolecules
Total 70 Marks
ISC REVISED SYLLABUS 2026
1
, PAPER I –THEORY – 70 Marks van’t Hoff- Boyle’s Law, van’t Hoff –
Charles’ Law, van’t Hoff - Avogadro’s
1. Solutions law.
Study of concentration of solutions of solids in (e) Abnormal molecular mass: Dissociation
liquids, liquid in liquid, solubility of gases in and Association with suitable examples
liquids, solid solutions, Colligative properties -
(f) van’t Hoff factor for the electrolytes
Raoult's law of relative lowering which dissociate and the molecules
of vapour pressure (1st & 2nd), elevation of which associate in solution.
boiling point, depression of freezing Modification of the formula of colligative
point, osmotic pressure. Use of colligative properties based on van’t Hoff factor.
properties in determining molecular masses of Simple problems. Calculation of degree
solutes, abnormal molecular mass association and of dissociation and association.
dissociation, van't Hoff factor. Experimental details not required.
Normality, molality, molarity, mole fraction, Numerical problems based on all the above
ppm, as measures of concentration. Definition of methods. Experimental details not required.
the above with examples. Simple problems based
on the above. 2. Electrochemistry
(i) Solubility of gases in liquids – Henry’s Law, Electrolytic and electrochemical cells. Redox
simple numericals based on the above. reactions in electrochemical cells.
Electromotive Force (emf) of a cell, standard
(ii) Raoult’s Law for volatile solutes and non-
volatile solutes, ideal solution, non-ideal electrode potential, Nernst equation and its
solution. Azeotropic mixtures – definition, application to chemical cells. Relation between
types, graphical representation, fractional Gibbs energy change and emf of a cell.
distillation with examples. Conductance in electrolytic solutions, specific,
(iii) Colligative properties – definition and equivalent and molar conductivity, variations of
examples, and its use in determination of conductivity with concentration, graphs;
molecular mass. Kohlrausch's Law of electrolysis and Faraday’s
(a) Relative lowering of vapour pressure: Laws of electrolysis. Dry cell and lead
Definition and mathematical expression accumulator, fuel cells, corrosion.
of Raoult’s Law. Determination of (i) Electrochemical cells: introduction, redox
relative molecular mass by measurement reactions (principle of oxidation and
of lowering of vapour pressure. reduction in a cell).
(b) Depression in freezing point: molal
(ii) Galvanic cells - introduction;
depression constant (cryoscopic
representation, principle – oxidation
constant) – definition and mathematical
expression (derivation included). reduction. Mechanism of production of
electric current in a galvanic cell.
(c) Elevation in boiling point method: molal
elevation constant (ebullioscopic (iii) Measurement of potential. Single electrode
constant) definition and mathematical potentials.
expression (derivation included). Standard hydrogen electrode (Eo) -
(d) Osmotic pressure: definition and definition, preparation, application and
explanation. Natural and chemical limitations.
semipermeable membranes, reverse Standard electrode potential - Measurement
osmosis, isotonic, hypotonic and
of standard electrode potential of Zn ++ / Zn,
hypertonic solutions. Comparison
between diffusion and osmosis. Cu ++ / Cu, half cell (using standard
Application of osmotic pressure in the hydrogen electrode).
determination of relative molecular Cell notation – representation.
mass. Factors affecting electrode potential with
explanation - main emphasis on the
ISC REVISED SYLLABUS 2026
2
CLASS XII
There will be two papers in the subject: Paper II: Practical: 3 hours ... 15 marks
Paper I: Theory - 3 hours ... 70 marks Project Work … 10 marks
Practical File … 5 marks
PAPER I - THEORY: 70 Marks
S.No. UNIT TOTAL WEIGHTAGE
1. Solutions
Physical Chemistry
2. Electrochemistry
25 Marks
3. Chemical Kinetics
4. d -and f -Block Elements Inorganic Chemistry
5. Coordination Compounds 14 Marks
6. Haloalkanes and Haloarenes
7. Alcohols, Phenols and Ethers
Organic Chemistry
8. Aldehydes, Ketones and Carboxylic Acids
31 Marks
9. Organic Compounds containing Nitrogen
10. Biomolecules
Total 70 Marks
ISC REVISED SYLLABUS 2026
1
, PAPER I –THEORY – 70 Marks van’t Hoff- Boyle’s Law, van’t Hoff –
Charles’ Law, van’t Hoff - Avogadro’s
1. Solutions law.
Study of concentration of solutions of solids in (e) Abnormal molecular mass: Dissociation
liquids, liquid in liquid, solubility of gases in and Association with suitable examples
liquids, solid solutions, Colligative properties -
(f) van’t Hoff factor for the electrolytes
Raoult's law of relative lowering which dissociate and the molecules
of vapour pressure (1st & 2nd), elevation of which associate in solution.
boiling point, depression of freezing Modification of the formula of colligative
point, osmotic pressure. Use of colligative properties based on van’t Hoff factor.
properties in determining molecular masses of Simple problems. Calculation of degree
solutes, abnormal molecular mass association and of dissociation and association.
dissociation, van't Hoff factor. Experimental details not required.
Normality, molality, molarity, mole fraction, Numerical problems based on all the above
ppm, as measures of concentration. Definition of methods. Experimental details not required.
the above with examples. Simple problems based
on the above. 2. Electrochemistry
(i) Solubility of gases in liquids – Henry’s Law, Electrolytic and electrochemical cells. Redox
simple numericals based on the above. reactions in electrochemical cells.
Electromotive Force (emf) of a cell, standard
(ii) Raoult’s Law for volatile solutes and non-
volatile solutes, ideal solution, non-ideal electrode potential, Nernst equation and its
solution. Azeotropic mixtures – definition, application to chemical cells. Relation between
types, graphical representation, fractional Gibbs energy change and emf of a cell.
distillation with examples. Conductance in electrolytic solutions, specific,
(iii) Colligative properties – definition and equivalent and molar conductivity, variations of
examples, and its use in determination of conductivity with concentration, graphs;
molecular mass. Kohlrausch's Law of electrolysis and Faraday’s
(a) Relative lowering of vapour pressure: Laws of electrolysis. Dry cell and lead
Definition and mathematical expression accumulator, fuel cells, corrosion.
of Raoult’s Law. Determination of (i) Electrochemical cells: introduction, redox
relative molecular mass by measurement reactions (principle of oxidation and
of lowering of vapour pressure. reduction in a cell).
(b) Depression in freezing point: molal
(ii) Galvanic cells - introduction;
depression constant (cryoscopic
representation, principle – oxidation
constant) – definition and mathematical
expression (derivation included). reduction. Mechanism of production of
electric current in a galvanic cell.
(c) Elevation in boiling point method: molal
elevation constant (ebullioscopic (iii) Measurement of potential. Single electrode
constant) definition and mathematical potentials.
expression (derivation included). Standard hydrogen electrode (Eo) -
(d) Osmotic pressure: definition and definition, preparation, application and
explanation. Natural and chemical limitations.
semipermeable membranes, reverse Standard electrode potential - Measurement
osmosis, isotonic, hypotonic and
of standard electrode potential of Zn ++ / Zn,
hypertonic solutions. Comparison
between diffusion and osmosis. Cu ++ / Cu, half cell (using standard
Application of osmotic pressure in the hydrogen electrode).
determination of relative molecular Cell notation – representation.
mass. Factors affecting electrode potential with
explanation - main emphasis on the
ISC REVISED SYLLABUS 2026
2
