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WBJEE 2022 Chemistry Topic-Wise Weightage & List of Important Topics

Dipanjana Sengupta
Dipanjana SenguptaUpdated On: July 06, 2022 03:28 pm IST | WBJEE

The exam pattern of Chemistry WBJEE 2022 weightage is given below. Check out the  preparation tips and topic wise weighatge along with the important topics.

WBJEE 2022 Chemistry Topic-Wise Weightage & List of Important Topics

Chemistry is considered to be one of the most important as well as easier compared to the other topics of WBJEE. This section carries 40 questions comprising of 50 marks. Apart from analyzing the topic-wise weightage of 2022, you need to go through the previous year's question papers and practice sample question papers as well for understanding the topics and to intensify your knowledge regarding the exam. You can check the topic-wise weightage of WBJEE 2022, along with the list of important topics for you to plan your studies accordingly. The tips to score 100% marks in chemistry WBJEE 2022 has been shared in this article.

WBJEE 2022 Exam Pattern

The exam pattern of WBJEE 2022 Chemistry can be checked below:

Particulars

Details

Mode of exam

Offline mode ( OMR Based Exam)

Duration

1 hour

Type and number of questions

  • Category 1- 30  questions

  • Category 2- 5 questions

  • Category 3- 5 questions

Marking scheme

  • Category 1- 1 mark

  • Category 2- 2 mark

  • Category 3- 2

Negative marking

  • Category 1- (-¼ ) for every wrong answer

  • Category 2- (-½ ) for every wrong answer

  • Category 3- (- ½ ) for every wrong answer

Latest WBJEE Chemistry Syllabus

It is important to know the latest WBJEE Chemistry paper syllabus before finding out the topic-wise weightage - 

ChapterTopics
Atoms, Molecules and Chemical ArithmeticDalton’s atomic theory; Gay Lussac’s law of gaseous volume; Avogadro’s Hypothesis and its applications. Atomic mass; Molecular mass; Equivalent weight; Valency; Gram atomic weight; Gram molecular weight; Gram equivalent weight and mole concept; Chemical formulae; Balanced chemical equations; Calculations (based on mole concept) involving common oxidation-reduction, neutralization, and displacement reactions; Concentration in terms of mole fraction, molarity, molality and normality. Percentage composition, empirical formula and molecular formula; Numerical problems
Atomic StructureConcept of Nuclear Atom – electron, proton and neutron (charge and mass), atomic number. utherford’s model and its limitations; Extra nuclear structure; Line spectra of hydrogen atom. Quantization of energy (Planck’s equation E = hν); Bohr’s model of hydrogen atom and its limitations, Sommerfeld’s modifications (elementary idea); The four quantum numbers, ground state electronic configurations of many electron atoms and mono – atomic ions; The Aufbau Principle; Pauli’s Exclusion Principle and Hund’s Rule. Dual nature of matter and light, de Broglie's relationship, Uncertainty principle; The concept of atomic orbitals, shapes of s, p and d orbitals (pictorial approach)
Radioactivity and Nuclear ChemistryRadioactivity α-, β-, γ rays and their properties; Artificial transmutation; Rate of radioactive decay, decay constant, half-life and average age life period of radio-elements; Units of radioactivity; Numerical problems. Stability of the atomic nucleus – effect of neutron-proton (n/p) ratio on the modes of decay, group displacement law, radioisotopes and their uses (C, P, Co and I as examples) isobars and isotones (definition and examples), elementary idea of nuclear fission and fusion reactions.
The Periodic Table and Chemical FamiliesModern periodic law (based on atomic number); Modern periodic table based on electronic configurations, groups (Gr. 1-18) and periods. Types of elements – representative (s-block and p- block), transition (d-block) elements and inner transition (f-block/lanthanides and actinides) and their general characteristics. Periodic trends in physical and chemical properties – atomic radii, valency, ionization energy, electron affinity, electronegativity, metallic character, acidic and basic characters of oxides and hydrides of the representative elements (up to Z = 36). Position of hydrogen and the noble gases in the periodic table; Diagonal relationships
Chemical Bonding and Molecular StructureValence electrons, the Octet rule, electrovalent, covalent and coordinate covalent bonds with examples; Properties of electrovalent and covalent compounds. Limitations of Octet rule (examples); Fajans Rule. Directionality of covalent bonds, shapes of poly – atomic molecules (examples); Concept of hybridization of atomic orbitals (qualitative pictorial approach): sp, sp2 , sp3 and dsp2 . Molecular orbital energy diagrams for homonuclear diatomic species – bond order and magnetic properties. Valence Shell Electron Pair Repulsion (VSEPR) concept (elementary idea) – shapes of molecules. Concept of resonance (elementary idea), resonance structures (examples). Elementary idea about electronegativity, bond polarity and dipole moment, inter- and intra-molecular hydrogen bonding and its effects on physical properties (mp, bp and solubility); Hydrogen bridge bonds in diborane
Coordination CompoundsIntroduction, Double salts and complex salts, coordination compounds (examples only), Werner's theory, coordination number (examples of coordination number 4 and 6 only), colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds
Solid StateClassification 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
Liquid StateVapour pressure, viscosity and surface tension (qualitative idea only, no mathematical derivations)
Gaseous StateMeasurable properties of gases. Boyle’s Law and Charles Law, absolute scale of temperature, kinetic theory of gases, ideal gas equation – average, root mean square and most probable velocities and their relationship with temperature. Daltons Law of partial pressure, Grahams Law of gaseous diffusion. Deviations from ideal behavior. Liquefaction of gases, real gases, van der Waals equation; Numerical problems
Chemical Energetics and Chemical Dynamics
  • Chemical Energetics – Conservation of energy principle, energy changes in physical and chemical transformations. First law of thermodynamics; Internal energy, work and heat, pressure – volume work; Enthalpy. Internal energy change (ΔE) and Enthalpy change (ΔH) in a chemical reaction. Hesss Law and its applications (Numerical problems). Heat of reaction, fusion and apourization; Second law of thermodynamics; Entropy; Free energy; Criterion of spontaneity. Third law of thermodynamics (brief introduction).
  • Chemical Equilibria – The Law of mass action, dynamic nature of chemical equilibria. Equilibrium constants, Le Chateliers Principle. Equilibrium constants of gaseous reactions (Kp and Kc) and relation between them (examples). Significance of ΔG and ΔGº.
  • Chemical Dynamics – Factors affecting the rate of chemical reactions (concentration, pressure, temperature, catalyst), Concept of collision theory. Arrhenius equation and concept of activation energy.
  • Order and molecularity (determination excluded); First order reactions, rate constant, half – life (numerical problems), examples of first order and second order reactions
Physical Chemistry of Solutions
  • Colloidal Solutions – Differences from true solutions; Hydrophobic and hydrophilic colloids (examples and uses); Coagulation and peptization of colloids; Dialysis and its applications; Brownian motion; Tyndall effect and its applications; Elementary idea of emulsion, surfactant and micelle.
  • Electrolytic Solutions – Specific conductance, equivalent conductance, ionic conductance, Kohlrausch’s law, Faraday’s laws of electrolysis, applications. Numerical problems.
  • Non-electrolytic Solutions – Types of solution, vapour pressure of solutions. Raoult’s Law; Colligative properties – lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure and their relationships with molecular mass (without derivations); Numerical problems
Ionic and Redox Equilibria
  • Ionic equilibria – ionization of weak electrolytes, Ostwald’s dilution law. Ionization constants of weak acids and bases, ionic product of water, the pH – scale, pH of aqueous solutions of acids and bases; Buffer solutions, buffer action and Henderson equation.
  • Acid-base titrations, acid – base indicators (structures not required). Hydrolysis of salts (elementary idea), solubility product, common ion effect (no numerical problems)
Redox EquilibriaOxidation – Reduction reactions as electron transfer processes, oxidation numbers, balancing of redox reactions by oxidation number and ion-electron methods. Standard electrode potentials (E°), Electrochemical series, feasibility of a redox reaction. Significance of Gibb’s equation: ΔG° = – nFΔE° (without derivation), no numerical problems. Redox titrations with (examples); Nernst equations (Numerical problems)
HydrogenPosition of hydrogen in periodic table, occurrence, isotopes, preparation, properties and uses of hydrogen, hydrides-ionic covalent and interstitial; physical and chemical properties of water, heavy water, hydrogen peroxide – preparation, reactions and structure and use; hydrogen as a fuel
Chemistry of Non-Metallic Elements and their Compounds
  • Carbon – occurrence, isotopes, allotropes (graphite, diamond, fullerene); CO and CO2 production, properties and uses. Nitrogen and Phosphorus – occurrence, isotopes, allotopes, isolation from natural sources and purification, reactivity of the free elements. Preparation, properties, reactions of NH3, PH3, NO, NO2, HNO2, HNO3, P4O10, H3PO3 and H3PO4.
  • Oxygen and Sulphur – Occurrence, isotopes, allotropic forms, isolation from natural sources and purification, properties and reactions of the free elements. Water, unusual properties of water, heavy water (production and uses). Hydrogen peroxide and ozone (production, purification, properties and uses).
  • Halogens – comparative study, occurrence, physical states and chemical reactivities of the free elements, peculiarities of fluorine and iodine; Hydracids of halogens (preparation, properties, reactions and uses), inter- halogen compounds (examples); Oxyacids of chlorine
Chemistry of Metals
  • General principles of metallurgy – occurrence, concentration of ores, production and purification of metals, mineral wealth of India. Typical metals (Na, Ca, Al, Fe, Cu and Zn) – occurrence, extraction, purification (where applicable), properties and reactions with air, water, acids and non-metals. Manufacture of steels and alloy steel (Bessemer, Open-Hearth and L.D. process).
  • Principles of chemistry involved in electroplating, anodizing and galvanizing. Preparation and properties of K2Cr2O7 and KMnO4.
  • Lanthanoids – Electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction and its consequences.
  • Actinoids – Electronic configuration, oxidation states and comparison with lanthanoids. Chemistry in Industry:
  • Large scale production (including physicochemical principles where applicable, omitting technical details) and uses of Sulphuric acid (contact process), Ammonia (Haber’s process), Nitric acid (Ostwald’s process), sodium bi- carbonate and sodium carbonate (Solvey process)
PolymersNatural and synthetic polymers, methods of polymerization (addition and condensation), copolymerization, some important polymers – natural and synthetic like polythene, nylonpolyesters, bakelite, rubber. Biodegradable and non-biodegradable polymers
Surface ChemistryAdsorption – 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
Environmental ChemistryCommon modes of pollution of air, water and soil. Ozone layer, ozone hole – important chemical reactions in the atmosphere, Smog; major atmospheric pollutants; Green House effect; Global warming pollution due to industrial wastes, green chemistry as an alternative tool for reducing pollution, strategies for control of environment pollution
Chemistry of Carbon Compounds
  • Hybridization of carbon: σ – and π – bonds. Isomerism – constitutional and stereoisomerism; Geometrical and optical isomerism of compounds containing upto two asymmetric carbon atoms. IUPAC nomenclature of simple organic compounds – hydrocarbons, mono and bifunctional molecules only (alicyclic and heterocyclic compounds excluded).
  • Conformations of ethane and n-butane (Newman projection only). Electronic Effects: Inductive, resonance and hyperconjugation. Stability of carbocation, carbanion and free radicals; Rearrangement of carbocation; Electrophiles and nucleophiles, tautomerism in β-dicarbonyl compounds, acidity and basicity of simple organic compounds
Compounds
  • Alkanes – Preparation from alkyl halides and carboxylic acids; Reactions — halogenation and combustion.
  • Alkenes and Alkynes – Preparation from alcohols; Formation of Grignard reagents and their synthetic applications for the preparation of alkanes, alcohols, aldehydes, ketones and acids; SNl and SN2 reactions (preliminary concept). Markownikoff’s and anti-Markownikoff’s additions; Hydroboration;
  • Oxymercuration-demercuration, reduction of alkenes and alkynes (H2/Lindler catalyst and Na in liquid NH3), metal acetylides
Haloalkanes and HaloarenesHaloalkanes – Preparation from alcohols; Nomenclature, nature of C -X bond, physical and chemical properties, mechanism of substitution reactions, optical rotation. Formation of Grignard reagents and their synthetic applications for the preparation of alkanes, alcohols, aldehydes, ketones and acids; SN1 and SN2 reactions ( preliminary concept ). Uses and environmental effects of - dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT
Alcohols
  • Preparation of alcohols from carbonyl compounds and esters. Reaction – dehydration, oxidation, esterification, reaction with sodium, ZnCl2/HCl, phosphorous halides.
  • Ethers – Preparation by Williamson’s synthesis; Cleavage with HCl and HI. Aldehydes and Ketones – Preparation from esters, acid chlorides, gem-dihalides, Ca-salt of carboxylic acids. Reaction – Nucleophilic addition with HCN, hydrazine, hydroxyl amines, semi carbazides, alcohols; Aldol condensation, Clemmensen and Wolff – Kishner reduction, haloform, Cannizzaro and Wittig reactions.
  • Carboxylic Acids – Hydrolysis of esters (mechanism excluded) and cyanides; Hunsdicker and HVZ reactions.
  • Aliphatic Amines – Preparation from nitro, cyano and amido compounds. Distinction of 1º, 2º and 3º amines (Hinsberg method); Reaction with HNO2; Carbyl amine reaction
Aromatic Compounds
  • Benzene – Kekule structure, aromaticity and Hückel rule. Electrophilic substitution – halogenation, sulfonation, nitration, Friedel Crafts reaction, ozonolysis. Directive influence of substituents in monosubstituted benzenes. Carcinogenicity and toxicity.
  • Amines – Preparation from reduction of nitro compounds; Formation of diazonium salts and their stability; Replacement of diazonium group with H, OH, X (halogen), CN and NO2, diazocoupling and reduction.
  • Haloarenes – Nature of C -X bond, substitution reactions; Nucleophilic substitution, cine substitution (excluding mechanism, Directive influence of halogen in monosubstituted compounds only).
  • Phenols – halogenation, sulfonation, nitration, Reimer – Tiemann and Kolbe reactions. Aromatic Aldehydes – Preparation by Gattermann, Gattermann-Koch, Rosenmund and Stephen’s method. Reactions – Perkin, Benzoin and Cannizzaro
Application Oriented ChemistryMain ingredients, their chemical natures (structures excluded) and their side effects, if any, of common antiseptics, analgesics, antacids, vitamin-C
Introduction to Bio-Molecules
  • Carbohydrates – Pentoses and hexoses. Distinctive chemical reactions of glucose. Aminoacids – glycine, alanine, aspartic acid, cysteine (structures). Zwitterion structures of amino acids, peptide bond.
  • ADP and ATP – structures and role in bioenergetics; Nucleic acids – DNA and RNA skeleton structures. Names of essential elements in biological system
Principles of Qualitative AnalysisDetection of water soluble non-interfering Acid and Basic Radicals by dry and wet tests from among: Acid Radicals: Cl- , S2-, SO4 2- , NO3 – , CO3 2- . Basic Radicals: Cu2+, Al3+, Fe3+, Fe2+, Zn2+, Ca2+, Mg2+, Na+ , NH4+ .
Detection of special elements (N, Cl, Br, I and S) in organic compounds by chemical tests. Identification of functional groups in: phenols, aromatic amines, aldehydes, ketones and carboxylic acids

WBJEE 2022 Chemistry Expected Topic-Wise Weightage

The topic-wise weightage is examined below. To understand the topic with much more clarity, we have mentioned the syllabus beneath the important topics. This year the weightage is assumed to be 29.2% of the total syllabus.

Important chapters

Weightage

Hydrocarbons                                                 

6.8%

Alcohol, Phenols, Ethers                                

6.8%

Thermodynamics [C]                                       

6%

General organic chemistry                             

5.6 %

P Block Elements [ Group 15, 16, 17, 18 ]     

5.6%

Chemical kinetics                                            

7%

S block elements                                                

6.2%   

Carboxylic acids and Derivatives                          

4%

Redox Reactions                                                   

5%

Ionic Equilibrium                                                    

4%

Chemical Equilibrium                                            

4%

Coordination Compounds

4%

Note: This weightage is assumed from last year's questions. The actual weightage may vary for WBJEE Physics 2022.

Syllabus of WBJEE 2022 Chemistry

The syllabus of WBJEE Chemistry 2022 have been listed below:

Atoms, Molecules and Chemical Arithmetic

Chemistry in Industry

Dalton’s Atomic Theory

Polymers

Atomic Structure

Environmental Chemistry

Concept of Nuclear Atom

Compounds

Radioactivity and Nuclear Chemistry

Haloarenes

The Periodic Table and Chemical Families

Aromatic Compounds

Chemical Bonding and Molecular Structure

Introduction to Biomolecules

Alcohols

Coordination Compounds

Application Oriented Chemistry

Solid State

Principles of Qualitative Analysis

Liquid State

Chemical Energetics and Chemical Dynamics

Surface Chemistry

Hydrogen

Chemical Equilibrium

Chemistry of Non-Metallic Elements and their compounds

Chemical Dynamics

Chemistry of Metals

Physical Chemistry of Solutions

Chemistry in Industry

Ionic and Redox Equilibria

Chemistry of Carbon Compounds

Haloalkanes

Tips To Score 40+ marks in WBJEE Chemistry 2022

"However difficult life may seem, there is always something you can do and succeed at". The quote is suitable for all the aspirants who want success on the grounds of any entrance examinations. Thus, hard work is the key to success and can be conquered easily. Moreover, working only hard cannot fetch you success, for this, you need to study smart. This article is based on the tips for WBJEE 2022 examination. WBJEE is a state-level examination for the would-be Btech students who are willing to take their admissions in the WBJEE participating institutions with more than 1 lakh students engaged in it to taste success.

  • Constructing and executing a proper study plan- By making a study plan and executing it properly with the right allocation of time for each topic will make your study procedure more planned and reconcilable. The most important thing that is to be kept in mind is that you will have to study the subjects simultaneously and engagement in extracurricular activities is necessary to freshen up your mind so that you do not feel tedious.

  • Be cordial with your syllabus-  Before starting with your preparation for WBJEE 2022, the first thing that needs to be done is the analysis of the syllabus so that there is a brief idea of what questions can be asked. Being amicable with the syllabus yields greater advantages to you.

  • Management of time is necessary-  Time management is the most important element for any examination. Since only 2 hours are granted to you for each paper, you need to be smart to answer the questions.

  • Solving the previous year's questions along with the sample papers-  As discussed above, for proper time management you need to prepare for mock tests. If there is a practice in solving the WBJEE sample papers, the previous years' questions and attempting mock tests in some stipulated time, will make you efficient in studying the exam pattern and you can also come up with similar questions in your exam. Attempting these papers will make you amend and highlight the incorrect answers that you have done.

  • Preparation of bullet notes- Preparing and following your own written notes can be useful. In case of any doubts, write it down and revise it until you are clear with the entire idea.

  • Diligently revise & rephrase-  Periodic tables are to be revised every day. The formulas and tables must be there at the fingertips and revision of the previously learned topics according to the weekly schedule will make you remember them and never forget them.

  • With a healthy body comes healthy success- Stress levels should be minimized and a good 8 hours of sleep with a healthy diet is to be maintained. Short breaks should be taken in between your study sessions.

Also Check: WBJEE 2022 Physics Topic-Wise Weightage & List of Important Topics

Stay tuned with CollegeDekho for more information!

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