CBSE Class 12 Chemistry Most Important Topics

Class 12 Chemistry most important topics

Class 12 Chemistry most important topics: Chemistry subject is one of the highest scoring papers for class 12th students, As of last year, most of the questions in the Chemistry subjects exams have been asked directly from the NCERT textbook. Therefore, students are advised to prepare only from the NCERT Book and refer to the question paper of previous year. If you do this much, then you can complete exam through good marks.

CBSE Board class 12th examination will probably start in the last month of February and the chemistry subject examination is held in March, then this time also it will be conducted in the month of March itself. More students get Chemistry as a disgusting subject, but you do not know that every year the maximum marks in the CBSE Board exam comes from the subject of Chemistry. So let’s talk about class 12 chemistry important topics.

CBSE Board class 12th Chemistry subject has a huge syllabus and it divided in to three part Physical, Inorganic, and Organic Chemistry.  There are total 15 units in Chemistry subject.

CBSE Class 12 Chemistry Most Important topics

Given below CBSE class 12 Chemistry most important topics:

Unit 1: Solid State

  • Classification of Crystalline Solids: (Molecular Solids, Ionic Solids, Metallic Solids Covalent or Network Solids)
  • Number of Atoms in a Unit Cell: (Simple Cubic Unit Cell, B.C.C Unit Cell and F.C.C Unit Cell)
  • Relation between radius of atom (r) and Edge-length of unit Cell (a):  (Simple Cubic Cell, F.C.C Cubic Cell and B.C.C Cubic Cell)
  • Calculation Involving Unit Cell Dimensions

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  • Electrical Properties:  (Conductors, Semiconductors and Insulators and n & p-type semiconductor)
  • Magnetic Properties: (Paramagnetic, Diamagnetic, Ferromagnetic, Antiferromagnetic and Ferrimagnetic)

Unit 2: Solutions

  • Molarity and Molality (only Numerical)
  • Henry’s law
  • Raoult’s law
  • Dalton’s law of partial pressure
  • Ideal and Non-ideal Solutions
  • Colligative Properties and Ditermination of Molar Mass: (Relative Lowering of Vapour Pressure, Elevation of Boiling Point, Depression of Freezing Point, Osmosis and Osmotic Pressure)
  • Van’t Hoff Factor
  • Important Graphs: (Ideal Solution, Positive Deviation, Negative Deviation, Elevation of Boiling Point and Depression of Freezing Point)

Unit 3: Electrochemistry

  • Galvanic cell
  • Electrolytic cell
  • Nernst Equation
  • Kohlrausch’s Law
  • EMF of a cell
  • Relation between Gibbs energy change and EMF of a cell
  • Faraday’s law of electrolysis

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Unit 4: Chemical Kinetics

  • Rate of Chemical Reaction
  • Order of a Reaction
  • Integrated Rate Equation: (Zero Order Reactions, First Order Reactions, Half-Life of a Reaction)
  • Pseudo First Order Reaction
  • Integrated Rate Law
  • Activation Energy
  • Arrhenious equation

Unit 5: Surface Chemistry

  • Adsorption, Absorption and its type (Very Important)
  • Shape Selective Catalysis by Zeolites
  • Difference between Homogeneous and Heterogeneous Catalysis
  • Lyophilic Solution and Lyophobic Solution
  • Multi-Molecular and Macromolecular colloids
  • Tyndall effect
  • Coagulation (types of emulsions)

Unit 6: General Principles and Processes of Isolation of Elements

  • Concentration of Ores: (Hydraulic Washing, Magnetic Separation, Froth Floatation Method and Leaching)
  • Extraction of Crude Metal from Concentration Ore: (Calcinations and Roasting)
  • Electrolytic method and refining
  • Uses of Aluminium, Copper, Zinc & Iron

Unit 7: The p-Block Elements

  • Group 15 Elements: (Electronic Configuration, Atomic and Ionic Radii, Ionisation Enthalpy, Electro negativity, Physical Properties and Chemical Properties)
  • Nitrogen, Preparation properties & uses
  • Preparation and properties of Ammonia and Nitric acid
  • Oxides of Nitrogen and Phosphorus
  • Preparation and properties of Phosphate, Halides and Ox acids (elementary idea only)
  • Group 16 Elements: (Electronic Configuration, Atomic and Ionic Radii, Ionisation Enthalpy, Electron Gain Enthalpy, Electronegativity, Physical Properties and Chemical Properties)
  • Dioxygen: Preparation, Properties & uses
  • Simple oxides
  • Ozone: Preparation properties and uses
  • Sulphuric Acid: (Manufacture, Properties and uses)
  • Group 17 Elements: (Electronic Configuration, Atomic and Ionic Radii, Ionisation Enthalpy, Electron Gain Enthalpy, Electronegativity, Physical Properties and Chemical Properties)
  • Compounds of Halogen
  • Chlorine (Preparation, Manufacture of Chlorine, Properties and Uses)
  • Hydrogen Chloride (Preparation, Properties and Uses)
  • Oxoacids of Halogens
  • Interhalogen Compounds (Preparation, Properties and Uses)
  • Group 18 Elements: (Electronic Configuration, Atomic Radii, Ionisation Enthalpy, Electron Gain Enthalpy, and Chemical Properties)

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Unit 8: The d-and f-Block Elements

  • d-Block elements
  •  f-Block elements
  • The Lanthanoids
  • The Actinoids

Unit 9: Coordination Compounds

  • Coordination Compounds, Ligands, Denticity, Unidentate ligands, Bidenate Ligands, Ambident Ligands, Ionization Isomers, Hydrate Isomers, Linkage Isomers, Co-ordination Isomers, Geometrical Isomerism, Optical Isomers (Definition and Example only)
  • Exercises Important Question (9.5, 9.6, 9.7, 9.24)

Unit 10: Haloalkanes and Haloarenes

  • Haloalkanes: Nomenclature, Nature of C-X bond, Physical properties and chemical properties, Mechanism of substitution reactions (and this chapter all IUPAC Name Related question)
  • Haloarenes:  Nomenclature , Nature of C -X bond, Substitution reactions, Dichloromethane, Trichloromethane, Tetrachloromethane, Iodoform, Freons (and this chapter all IUPAC Name Related question)

Unit 11: Alcohols, Phenols and Ethers

  • Alcohols: Nomenclature, Preparation of Alcohols, Physical Properties, Chemical Reactions, Mechanism of dehydration, Some Commercially important Alcohols of Methanol, Ethanol
  • Phenols: Nomenclature, Preparation of Phenols, Physical Properties, Chemical Reactions, Electrophilic Substitution, Uses of Phenols
  •  Ethers: Nomenclature, Preparation of Ethers, Physical Properties, Chemical Reactions, Uses of Ethers

Unit 12: Aldehydes, Ketones and Carboxylic Acids

  • Aldehydes and Ketones: Nomenclature, Nature of carbonyl group, Preparation of Aldehydes and Carboxylic Acids, Physical Properties, Chemical Reaction, Mechanism of Nucleophilic addition
  • Carboxylic Acids: Nomenclature, Method of preparation of Carboxylic Acids, Physical Properties, Chemical Reactions,  Uses of Carboxylic Acids

Unit 13: Amines

  • Amines: Nomenclature, Preparation of Amines, Physical Properties, Chemical Reactions,
  • Diazonium Salts: Method of Preparation of Diazonium Salts, Importance of Diazonium Salts in Synthesis of Aromatic Compounds

Unit 14: Biomolecules

  • Classification of Carbohydrate
  • Stracture of glucose
  • Cyclic Stracture of glucose
  • Stracture of Frutose
  • Disaccharides
  • Polysaccharides
  • Stracture of Proteins
  • Enzyme and Vitamins
  • Stracture Nucleic Acids

Unit 15: Polymers

  • Classification Based on Mode of Polymerisation
  • Classification Based on Molecular Forces
  • Additional Polymerisation or Chain growth Polymerisation
  • Condensation Polymerisation or Step Growth Polymerisation
  • Preparation of Nylons
  • Natural Rubber
  • Synthetic Rubber
  • Some important Commercially Addition Polymers (table)

Unit 16: Chemistry in Everyday life

  • Therapeutic Action of Different Classes of Drugs (Definition & Example only- Antacids, Antihistamines, Tranquilizers, Analgesics, Antimicrobials, Antibiotics, Antiseptics, Disinfectants, Antfertility Drugs)
  • Chemicals in Food (Artificial Sweetening Agents, Food Preservatives)
  • Cleansing Agents (Definition & Example only- Surfactants, Detergents, Anionic Detergents, Cationic Detergents, Non-Ionic Detergents)

Class 12 Chemistry important topics

These are CBSE class 12 chemistry most important topics with syllabus. Students have to understand the above given CBSE class 12 Chemistry most important topics Chapter Wise well, if the students understand the topics given above, then they can pass the exam with a good number, then the student should give priority to this topic. 

Class 12 Chemistry most important topics

Class 12 Chemistry Most Important topics: Marks Distribution

Unit NumberUnit NameMarks (Expected)
1The Solid State4
4Chemical Kinetics5
5Surface Chemistry4
6Isolation of Elements3
7The p-Block Elements8
8The d- and f-Block Elements5
9Coordination Compounds3
10Haloalkanes and Haloarenes4
11Alcohols, Phenols and Ethers4
12Aldehydes, Ketones and Carboxylic Acids6
16Chemistry in Everyday Life3
Class 12 Chemistry Most Important topics

Class 12 Chemistry most important topics: Paper Attempt Tips

Class 12 Chemistry most important topics
Class 12 Chemistry most important topics

Class 12 Chemistry most important topics: First you read the class 12 chemistry most important topics & questions and feel that you can solve all the questions easily. So you should try to make the question from the beginning, if you do not know the whole question, then first of all You have to try after 5 digits. That is, do 4-5 correct questions in the paper and do questions that do not come in the middle, and then ask questions in the right questions, then you can get good marks.

You do all the questions in one section one time, and then do the other questions of the other section. If you do not have any questions in one section, then leave space for it, or do that question later. Well you have achieved better marks in board exam.

One mark of question is difficult in CBSE board exam, so try more marks of the question in the first attempt and try one mark question later. The most important thing for CBSE board class 12 students, if you want to pass the exam with good marks, keep one thing in mind just read the NCERT Book. If students read the full NCERT Book, then you read the previous year question Paper. Then you will get 90% above marks in CBSE board exam.

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