Learn about important topics and reactions which can be asked in the Class 12 Chemistry Board Exam 2020. As per CBSE Date Sheet 2020, CBSE Chemistry Paper 2020 is scheduled to be held in March.
Now, few days are left for CBSE board exam preparation so students should start the selective study. Complete CBSE Class 12 Chemistry Syllabus is categorised into Organic, Inorganic and Physical Chemistry. The subject has huge syllabus & now students should focus on revision.
Considering the importance of the selective study, here, we have guessed some important topics from the complete syllabus. There is a huge probability that questions based on these concepts will be asked in CBSE Class 12 Chemistry board exam 2020. Students preparing for this exam are also advised to go through the latest Class 12 Chemistry Sample Paper paper issued by CBSE. With this Sample Paper, students can easily understand the latest blueprint and examination pattern of CBSE Class 12 Chemistry board exam.
For important reactions which can be asked in CBSE Class 12 board exam 2020, please refer to the article from the link given below
Important Name Reactions in CBSE & JEE: Complete Analysis
CBSE Class 12 Chemistry Sample Paper 2020 (with Marking Scheme – Issued by CBSE)
List of important topics for CBSE Class 12 Chemistry board exam 2020 are given below:
Unit 1: Solid State –
Classification of solids based on different binding forces (Molecular, ionic, covalent and metallic solids)
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Unit cell in two dimensional and three dimensional lattices
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Calculation of density of unit cell
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Packing in solids
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Electrical and magnetic properties |
Band theory of Metals, Conductors, Semiconductors and Insulators and n & p type semiconductors
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Unit 2: Solutions –
Types of solutions
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Henry’s law – Questions related to Henry’s law are frequently asked in CBSE Class 12 Chemistry board exam |
Solubility of gases in liquids
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Colligative properties |
Raoult’s law (Important) |
Relative lowering of vapour pressure (Numerical problems are expected) |
Depression of freezing point (Theoretical questions on applications & numerical problems are expected) |
Elevation of boiling point (Numerical problems are expected) |
Osmotic pressure |
Determination of molecular masses using colligative properties (Numerical problems are expected) |
Abnormal molecular mass |
Van’t Hoff factor
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CBSE Class 12 Chemistry Solved Question Paper: 2017
Unit 3: Electrochemistry –
Redox reactions (prepare definition with examples, corrosion is an example of redox reaction) |
Conductance in electrolytic solutions (One marks questions are expected) |
Specific and molar conductivity (Numerical problems are expected, theoretical questions related to SI units are also expected) |
Variations of conductivity with concentration (Theoretical question can be asked) |
Kohlrausch’s Law (Numerical problems are expected) |
Electrolysis and law of electrolysis (Faradays’ laws are also important) |
Dry cell-electrolytic cells and Galvanic cells (Theoretical question can be asked) |
Lead accumulator (Theoretical question can be asked) |
EMF of a cell (Numerical problems are expected) |
Standard electrode potential (Very important) |
Nernst equation and its application to chemical cells |
Relation between Gibbs energy change and emf of a cell |
Fuel cells (Theoretical questions are expected) |
Corrosion (One should remember chemical equations) |
Unit 4: Chemical Kinetics –
Rate of a reaction (Average and instantaneous) |
Factors affecting rate of reaction: concentration, temperature, catalyst
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Order and molecularity of a reaction (Very important) |
Rate law and specific rate constant (Very important) |
Integrated rate equations and half life (only for zero and first order reactions) |
Concept of collision theory (elementary idea, no mathematical treatment) |
Activation energy (Very important, effect of temperature) |
Arrhenious equation (Very important) |
Unit 5: Surface Chemistry –
Adsorption – physisorption and chemisorption (Very important) |
Factors affecting adsorption of gases on solids
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Catalysis |
Homogenous and heterogeneous activity and selectivity |
Enzyme catalysis colloidal state distinction between true solutions |
Colloids and suspension |
Lyophilic, lyophobic multi-molecular and macromolecular colloids (Very important) |
Properties of colloids |
Tyndall effect (Very important) |
Brownian movement (Very important) |
Electrophoresis |
Coagulation |
Emulsion – types of emulsions |
Unit 6: General Principles and Processes of Isolation of Elements –
Principles and methods of extraction – concentration, oxidation, reduction (Very important) |
Electrolytic method and refining |
Occurrence and principles of extraction of aluminium, copper, zinc & iron |
Unit 7: p Block Elements –
Group 15 Elements: Electronic configuration, occurrence, oxidation states, trends in physical and chemical properties
Nitrogen, preparation properties & uses
Compounds of Nitrogen
Oxides of Nitrogen (Structure only) – Important Phosphorus – (Very important) Allotropic forms Compounds of Phosphorus Preparation and properties of Phosphine, Halides and Oxoacids (elementary idea only) |
Group 16 Elements: Electronic configuration, oxidation states, occurrence, trends in physical and chemical properties
Dioxygen: Preparation, Properties& uses (Very important) Classification of oxides Ozone (Very important) Sulphure -allotropic forms Compounds of sulphure: Preparation properties and uses of sulphur-dioxide Sulphuric acid: industrial process of manufacture, properties and uses (Very important) Oxoacids of Sulphur (Structures only) |
Group 17 Elements: Electronic configuration, oxidation states, occurrence, trends in physical and chemical properties Compounds of halogens Preparation properties and uses of chlorine and hydrochloric acid (Very important) Interhalogen compounds Oxoacids of halogens |
Group 18 Elements: Electronic configuration, occurrence, trends in physical and chemical properties & uses |
CBSE Class 12 Chemistry Solved Question Paper: 2016
Unit 8: d and f Block Elements –
Electronic configuration, occurrence and characteristics of transition metals General trends in properties of the first row transition metals –
Preparation and properties of K2Cr2O7 and KMnO4 |
Lanthanoids –
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Actinoids –
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Unit 9: Coordination Compounds –
Ligands |
Coordination number, colour, magnetic properties and shapes ( very important) |
IUPAC nomenclature of mononuclear coordination compounds |
Bonding, Werner’s theory VBT (very important) CFT (very important) |
Structure and stereo isomerism (very important) |
Unit 10: Haloalkanes and Haloarenes –
Haloalkanes:
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Haloarenes:
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Unit 11: Alcohols, Phenols and Ethers –
Alcohols: Nomenclature Methods of preparation Physical and chemical properties (primary alcohols only) Identification of primary, secondary and tertiary alcohols (very important) Mechanism of dehydration, uses with special reference to methanol and ethanol |
Phenols:
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Ethers:
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Unit 13: Aldehydes, Ketones and Carboxylic Acids
Aldehydes and Ketones:
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Carboxylic Acids:
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Unit 14: Organic compounds containing Nitrogen
Amines:
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Cyanides and Isocyanides |
Diazonium salts:
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Unit 14: Biomolecules
Carbohydrates –
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Proteins –
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Classification of polymers –
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Unit 15: Chemistry in Everyday Life
Chemicals in medicines –
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Chemicals in food –
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Cleansing agents –
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These are some important topics from the complete CBSE Class 12th Chemistry Syllabus. Students can expect questions from these topics in the board exam. While preparing for CBSE Class 12th Chemistry board exam 2020 students should give priority to the topics mentioned above.