CBSE Board 2017 Chemistry Expected Questions with solutions pdf

The Central Board of Secondary Education Abbreviated as CBSE every year conducts Board Examination for the students of class Xth and Class XIIth. For the session 2016-17 also the CBSE is going to conduct the Board Examination and the Time Table has also been released in the official site of CBSE.  The Board examination will be continuing from March to April for all the streams i.e. Science Stream, Commerce Stream and Arts Stream.  Lacs of students have registered themselves for this Board Examination and are preparing for their exams.

The students of Science Streams might be working more hard than the students of other streams as it has the toughest subjects of Physics, Chemistry and mathematics.  In this post we will provide Chemistry sample papers for class 12th students so that they can prepare themselves well for their exams.

 

CBSE Board 2017 Chemistry Sample papers

 

As we know Chemistry is one of the most toughest subjects for most of the students.  Many students are trying very hard but can’t understand the difficult chemical reaction. So at this we are providing here some free Chemistry Sample Papers which may be useful for your upcoming CBSE Class 12th Board Examination 2017. 

But before that let us have a look at some important exam preparation tips.

Exam Preparation tips :-

Chemistry is the branch of science that deals with study of composition, properties, structure and matter. For many it is a subject with complications but with right preparation and study plan one can easily cover the subject. Here are some of the important tips that can help you in knowing the right way to handle the subject.

  • For chemistry, NCERT part-1 and part-2 are considered as the best books for preparation. It gives a sound idea of the topics covered in the chapter in the most conducive manner considering the board examinations. Apart from NCERT a candidate can keep one reference book. But use of too many books should be avoided. Also go through the CBSE Syllabus once before you start.
  • When studying for the first time each chapter should be given equal importance irrespective of their marks weightage. Try to understand the concepts rather than memorizing them.
  • Once you have completed a chapter make sure that you attempt all the problems mentioned in NCERT textbook related to that chapter.
  • Once you have covered all the chapters, start solving CBSE board sample papers and previous year papers. A thorough study of previous year question papers reveals not only the marks weightage of different chapters but also the type of questions that can be asked from different chapters because the pattern of CBSE board is more or less static..
  • Solving CBSE sample papers also prepares you to manage your time accordingly on the day of your examination.
  • While writing the examination you should be precise in your answers and also try to write in points as much as possible so that it is easy for the examiner to evaluate.

Question paper structure :

S.No Types of question Marks for each question No. of questions Total marks
1 Long Answer Question 5 3 15
2 Short Answer-I 2 5 10
3 Short Answer-II 3 12 36
4 Value Based Question 4 1 4
5 Very Short Answer Questions 1 5 5
Total 26 70

 

Chemistry Course Structure

Unit Title Marks
I Solid State 23
II Solutions
III Electrochemistry
IV Chemical Kinetics
V Surface Chemistry
VI Isolation of Elements 19
VII p-Block Elements
VIII d- and f-Block Elements
IX Coordination Compounds
X Haloalkanes and Haloarenes 28
XI Alcohols, Phenols and Ethers
XII Aldehydes, Ketones and Carboxylic Acids
XIII Organic Compounds containing Nitrogen
XIV Biomolecules
XV Polymers
XVI Chemistry in Everyday Life
Total 70

Unit I: Solid State

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, packing efficiency, voids, number of atoms per unit cell in a cubic unit cell, point defects, electrical and magnetic properties.

Band theory of metals, conductors, semiconductors and insulators and n & p type semiconductors.

Unit II: Solutions

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, Raoult’s law, elevation of boiling point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass, van’t Hoff factor.

Unit III: Electrochemistry

Redox reactions, conductance in electrolytic solutions, specific and molar conductivity, variations of conductivity with concentration, Kohlrausch’s Law, electrolysis and law 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, Relation between Gibbs energy change and emf of a cell, fuel cells, corrosion.

Unit IV: Chemical Kinetics

Rate of a reaction (Average and instantaneous), factors affecting rate 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). Activation energy, Arrhenious equation.

Unit V: Surface Chemistry

Adsorption – physisorption and chemisorption, factors affecting adsorption of gases on solids, catalysis, homogenous and heterogenous activity and selectivity; enzyme catalysis colloidal state distinction between true solutions, colloids and suspension; lyophilic , lyophobic multimolecular and macromolecular colloids; properties of colloids; Tyndall effect, Brownian movement, electrophoresis, coagulation, emulsion – types of emulsions.

Unit VI: General Principles and Processes of Isolation of Elements

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

Group 15 Elements: General introduction, electronic configuration, occurrence, oxidation states, trends in physical and chemical properties; nitrogen preparation properties & uses ; compounds of nitrogen, preparation and properties of ammonia and nitric acid, oxides of nitrogen (Structure only) ; Phosphorus – allotropic forms, compounds of phosphorus: preparation and properties of phosphine, halides PCl3 , PCl5 and oxoacids (elementary idea only).

Group 16 Elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties,dioxygen: Preparation, Properties and uses, classification of oxides, Ozone, Sulphure -allotropic forms; compounds of sulphure: Preparation properties and uses of sulphur-dioxide, sulphuric acid: industrial process of manufacture, properties and uses; oxoacids of sulphur (Structures only).

Group 17 Elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties; compounds of halogens, Preparation properties and uses of chlorine and hydrochloric acid, interhalogen compounds, oxoacids of halogens (structures only).

Group 18 Elements: General introduction, electronic configuration, occurrence, trends in physical and chemical properties, uses.

Unit VIII: d and f Block Elements

General introduction, electronic configuration, occurrence and characteristics of transition metals, general trends in properties of the first row transition metals – metallic character, ionization enthalpy, oxidation states, ionic radii, colour, catalytic property, magnetic properties, interstitial compounds, alloy formation, preparation and properties of K2Cr2O7 and KMnO4.

Lanthanoids – Electronic configuration, oxidation states, chemical reactvity and lanthanoid contraction and its consequences.

Actinoids – Electronic configuration, oxidation states and comparison with lanthanoids.

Unit IX: Coordination Compounds

Coordination compounds – Introduction, ligands, coordination number, colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds. Bonding, Werner’s theory, VBT, and CFT; structure and stereo isomerism, importance of coordination compounds (in qualitative inclusion, extraction of metals and biological system).

Unit X : Haloalkanes and Haloarenes

Haloalkanes: Nomenclature, nature of C-X bond, physical and chemical properties, mechanism of substitution reactions, optical rotation.

Haloarenes: Nature of C -X bond, substitution reactions (Directive influence of halogen in monosubstituted compounds only.

Uses and environmental effects of – dichloromethane, trichloromethane, tetrachloromethane, iodoform freons, DDT.

Unit XI: Alcohols, Phenols and Ethers

Alcohols: Nomenclature, methods of preparation, physical and chemical properties( of primary alcohols only), identification of primary, secondary and tertiary alcohols, mechanism of dehydration, uses with special reference to methanol and ethanol.

Phenols: Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophillic substitution reactions, uses of phenols.

Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

Unit XII: Aldehydes, Ketones and Carboxylic Acids

Aldehydes and Ketones: Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties, mechanism of nucleophillic addition, reactivity of alpha hydrogen in aldehydes: uses.

Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties; uses.

Unit XIII: Organic compounds containing Nitrogen

Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines.

Cyanides and Isocyanides – will be mentioned at relevant places in context.

Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

Unit XIV: Biomolecules

Carbohydrates – Classification (aldoses and ketoses), monosaccahrides (glucose and fructose), D-L configuration oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen) importance.

Proteins – Elementary idea of α – amino acids, peptide bond, polypeptides, proteins, structure of proteins – primary, secondary, tertiary structure and quaternary structures (qualitative idea only), denaturation of proteins; enzymes. Hormones – Elementary idea excluding structure.

Vitamins – Classification and functions.

Nucleic Acids: DNA and RNA.

Unit XV: Polymers

Classification – natural and synthetic, methods of polymerization (addition and condensation), copolymerization, some important polymers: natural and synthetic like polythene, nylon polyesters, bakelite, rubber. Biodegradable and non-biodegradable polymers.

Unit XVI: Chemistry in Everyday life

Chemicals in medicines – analgesics, tranquilizers antiseptics, disinfectants, antimicrobials, antifertility drugs, antibiotics, antacids, antihistamines.

Chemicals in food – preservations, artificial sweetening agents, elementary idea of antioxidants.

Cleansing agents – soaps and detergents, cleansing action.

 

Sample Papers for CBSE Board Class 12th – Chemistry

 

Sample papers help students a lot as they are essentially board certified question papers. Students can learn a lot about the type of questions asked and that helps beat stress.  The other thing that sample papers help students with, according to experts, is time management. By attempting sample papers like actual board exam papers and giving themselves three hours, students can manage their time much better. Sample papers are a very important tool to understand the division of marks, type of questions asked and develop a familiarity with the examination patterns.

Below we are providing sample paper for Chemistry.  Students can download them and start their exam preparation.

We wish all the Students Best of Luck for board Exams.  For any queries you can write us in the below provided box and keep visiting our site for more updates. And Best of Luck for your Board Exams.

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