CBSE Class 12 Chemistry Syllabus 2024-25 (Out), Marking Scheme, Chapter-Wise PYQs, Important Questions

CBSE Class 12 Chemistry Chapter-wise Practical Syllabus 2024-25

CBSE Class 12 Chemistry Practical Syllabus 2024-25 chapter wise is tabulated below. Students should follow this given syllabus, as this was updated by the board for the upcoming exam:

A. Surface Chemistry

(a) Preparation of one lyophilic and one lyophobic sol

Lyophilic sol - starch, egg albumin and gum

Lyophobic sol - aluminium hydroxide, ferric hydroxide, arsenous sulphide.

(b) Dialysis of sol-prepared in (a) above.

(c) Study of the role of emulsifying agents in stabilizing the emulsion of different oils.

B. 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 concentration of Iodide ions.

(ii) Reaction between Potassium Iodate, (KIO3) and Sodium Sulphite: (Na2SO3) using starch solution as indicator (clock reaction).

C. Thermochemistry

Any one of the following experiments

i) Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.

ii) Enthalpy of neutralization of strong acid (HCI) and strong base (NaOH).

iii) Determination of enthaply change during interaction (Hydrogen bond formation) between Acetone and Chloroform.

D. Electrochemistry

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

E. 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 only two cations only (constituents having large difference in Rf values to be provided).

F. Preparation of Inorganic Compounds

Preparation of double salt of Ferrous Ammonium Sulphate or Potash Alum. Preparation of Potassium Ferric Oxalate.

G. Preparation of Organic Compounds

Preparation of any one of the following compounds

i) Acetanilide

ii) Di -benzalAcetone

iii) p-Nitroacetanilide

iv) Aniline yellow or 2 - Naphthol Anilinedye.

H. Tests for the functional groups present in organic compounds:

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

I. Characteristic tests  

Carbohydrates, fats and proteins in pure samples and their detection in given foodstuffs.

J. Determination of concentration/ molarity of KMnO4 solution by titrating it against a standard solution of:

i) Oxalic acid

ii) Ferrous Ammonium Sulphate (Students will be required to prepare standard solutions by weighing themselves).

K. Qualitative analysis Determination of one cation and one anion in a given salt.

Cation : Pb2+, Cu2+ As3+, Aℓ3+, Fe3+, Mn2+, Zn2+, Cu2+, Ni2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4 +

Anions: (CO3) 2- , S2- , (SO3) 2- , (NO2) - , (SO4) 2- , Cℓ - , Br- , I- , PO3- 4, (C2O4) 2- , CH3COO- ,NO3

CBSE Class 12 Chemistry Chapter-Wise Marks Distribution 2024-25

The chapter-wise mark weightage for the CBSE Class 12 Chemistry Syllabus is tabulated below:

CBSE Class 12 Chemistry Practical Syllabus Marks Distribution 2024-25

CBSE Class 12 Chemistry practicals have a weightage of 30 marks in total. These marks are distributed as follows:

CBSE Class 12 Chemistry Project Work

The suggested project work for CBSE Class 12 Chemistry is given below:

• Study of the 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 power, chilli powder and pepper.

CBSE Class 12 Chemistry Deleted Syllabus 2024-25

The topics that were excluded from the CBSE Class 12 Chemistry Syllabus in the academic year 2023-24 remain excluded this academic year also. Students can check out the deleted topics of the CBSE Class 12 English Syllabus from the below table:

CBSE Class 12 Chemistry Chapter-wise Most Important Topics

• Solution

1. Mole Fraction
2. Molality vs Molarity
3. Henry’s Law
4. Raoult’s Law
5. Colligative Property
6. Abnormal Moleculer Mass

• Electrochemistry

1. Nernst Equation
2. Conduction and Kohlrausch's Law
3. Faraday’s Law
4. Reaction of Corrosion - Batteries, Fuel Cell.

• Chemical Kinetics

1. Unit of rate constant for different order
2. Arrhenius Equation
3. Order and Molecularity
4. Numericals of First order

• d and f Block Elements

1. Properties of d block elements
2. Lanthanoid Contraction
3. Properties of Zn, Cd, and Hg and Transition elements

• Coordination Compounds

1. Theories: N.B.T., CF.T., and Werner theory
2. Nomenclature and Isomerism

• Haloalkanes and Haloarenes

1. Nomenclature
2. SN1 and SN2
3. B- elimination
4. M.R and A.M.R
5. Name RXY

• Alcohols, Phenols and Ethers

1. Mechanism: Hydration of Alkene, Dehydration of Alocohol to Alkene, Dehydration of Alcohol to ether.
2. Kolbels Rxn, Reimer Tiemann Rxn, Acidic Property, Oxidation Property.

• Aldehydes, Ketones and Carboxylic Acids

1. Cannizzaro, Aldol, Cross Aldol, HVZ Rxn
2. Acidic Characters of Carboxylic Acids
3. Reactions

• Amines

1. Basic strengths of Amines
2. Hoffman Bromonide Degradation,
3. Properties of Diazonium salt.

• Biomolecules

1. Chemical properties of Glucose
2. Denaturation of Proteins
3. Fibrous proteins and globular proteins
4. DNA and RNA

CBSE Class 12 Chemistry New Exam Pattern 

CBSE Class 12 Chemistry Exam pattern has been changed for the academic year of 2024-25. Students can checkout the new exam pattern from the below table: 

CBSE Class 12 Chemistry NCERT Solutions

Students can check the NCERT Chemistry class 12 intext questions solutions for each chapter below:

CBSE Class 12 Chemistry Books

NCERT books are the best materials to prepare for the CBSE Class 12 Chemistry exam, as NCERT books strictly follow the CBSE Class 12 Chemistry syllabus. Questions from NCERT books are sometimes directly asked in the question paper. Furthermore, for better preparation, some of the reference books are listed below: