CBSE CLASS 12 SYLLABUS FOR CHEMISTRY EXAM 2019:
CBSE EXAM 2019:
☛ The Central Board of Secondary Education (CBSE) will conduct board examinations from February for the coming academic year 2019. The board has already released a list of vocational subjects for the examinations that will be conducted from February to March 2019, the schedule and date of the examinations will be released later.
☛ Apart from the 40 different vocational subjects, the board will conduct exams for typography and Computer Applications (English), web applications, graphics, office communication, et al, in February as these subjects have larger practical component, and shorter theory papers.
Chemistry
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.
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 (PCl3, PCl5) and oxoacids (elementary idea only).
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