JEE Main logo

JEE Main 2021 Chemistry Syllabus- Topics, Weightage, Preparation and Paper Attempting Tips

Admit Card: 28 May `21
See all dates
Karishma Khatri logo

Karishma Khatri

Exams Prep. Master | Updated On - Apr 29, 2021

Chemistry is often considered the most scoring section by test takers and experts in JEE Main B.E/ B.Tech paper. As we know, it is divided into three parts Organic chemistry, Inorganic chemistry and Physical chemistry. This year, JEE Main Chemistry will be further divided into 2 sections, Section A will have 20 MCQs. Section B will have 10 Numerical value answer based questions, out of which candidates have to attempt 5. Check JEE Main 2021 New Exam Pattern

Through this article, we have tried to cover a range of aspects of JEE Main Chemistry Syllabus which includes, the unit wise syllabus, topic-wise weightage, video lectures, mock tests, reference books, difficulty level analysis, and tips for attempting the chemistry section and preparation strategies. 

Latest Updates

  • April 20, 2021: JEE Main Chemistry Question Papers for previous years available. Download Here
  • April 18, 2021: JEE Main April Session Postponed, new dates yet to be released by NTA. Read More

Unit-wise Syllabus

JEE Main Chemistry: Unit-wise Syllabus by NTA

JEE Main Chemistry syllabus comprises a total of three sections spread over 28 units. Download JEE Main Official Syllabus Released by NTA

Section A: Physical Chemistry
Unit Number Topic Sub-topics
1. Some Basic Concepts of Chemistry

Matter and its nature, Dalton’s the atomic theory, the concept of the atom, molecule, element, and compound;

Physical quantities and their measurements in Chemistry, precision, and accuracy, significant figures, S.I. Units, dimensional analysis;

Laws of chemical combination;

Atomic and molecular masses, mole concept, molar mass, percentage composition, empirical and molecular formulae;

Chemical equations and stoichiometry.

2. States of Matter

Classification of matter into solid, liquid and gaseous states;

Gaseous State: Measurable properties of gases; Gas laws – Boyle’s law, Charles’s law, Graham’s law of diffusion, Avogadro’s law, Dalton’s law of partial pressure;

The concept of the Absolute scale of temperature; Ideal gas equation, Kinetic theory of gases (only postulates);

The concept of average, root mean square and most probable velocities;

Real gases, deviation from Ideal behaviour, compressibility factor, van der Waals equation, liquefaction of gases, critical constants;

Liquid State: Properties of liquids – vapour pressure, viscosity and surface tension and effect of temperature on them (qualitative treatment only);

Solid State: Classification of solids-molecular, ionic, covalent and metallic solids, amorphous and crystalline solids (elementary idea);

Bragg’s Law and its applications;

Unit cell and lattices, packing in solids (fcc, bcc and hcp lattices), voids, calculations involving unit cell parameters, imperfection in solids;

Electrical, magnetic and dielectric properties.

3. Atomic Structure

Discovery of subatomic particles (electron, proton, and neutron);

Thomson and Rutherford atomic models and their limitations;

Nature of electromagnetic radiation, photoelectric effect;

The spectrum of hydrogen atom, Bohr model of hydrogen atom – its postulates, derivation of the relations for energy of the electron and radii of the different orbits, limitations of Bohr’s model;

Dual nature of matter, de-Broglie relationship, Heisenberg uncertainty principle;

Elementary ideas of quantum mechanics, the quantum mechanical model of an atom, its important features, the concept of atomic orbitals as one-electron wave functions;

Variation of Ψ1 and Ψ2 with r for 1s and 2s orbitals; various quantum numbers (principal, angular momentum, and magnetic quantum numbers), and their significance;

Shapes of s, p and d – orbitals, electron spin and spin quantum number;

Rules for filling electrons in orbitals – Aufbau principle, Pauli exclusion principle and Hund’s rule, electronic configuration of elements, the extra stability of half-filled, and completely filled orbitals.

4. Chemical Bonding and Molecular Structure

Kossel – Lewis approach to chemical bond formation, the concept of ionic and covalent bonds;

Ionic Bonding: Formation of ionic bonds, factors affecting the formation of ionic bonds; calculation of lattice enthalpy;

Covalent Bonding: Concept of electronegativity, Fajan’s rule, dipole moment; Valence Shell Electron Pair Repulsion (VSEPR) theory and shapes of simple molecules;

Quantum mechanical approach to covalent bonding: Valence bond theory, Its important features, the concept of hybridization involving s, p, and d orbitals; Resonance;

Molecular Orbital Theory: Its important features, LCAOs, types of molecular orbitals (bonding, antibonding), sigma and pi-bonds, molecular orbital electronic configurations of homonuclear diatomic molecules, the concept of bond order, bond length and bond energy;

Elementary idea of metallic bonding, Hydrogen bonding, and its applications.

5. Chemical Thermodynamics

Fundamentals of thermodynamics: System and surroundings, extensive and intensive properties, state functions, types of processes;

First law of thermodynamics: Concept of work, heat internal energy, and enthalpy, heat capacity, molar heat capacity;

Hess’s law of constant heat summation;

Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, hydration, ionization, and solution;

The second law of thermodynamics: Spontaneity of processes; Delta S of the universe and Delta G of the system as criteria for spontaneity, Delta Go (Standard Gibbs energy change) and equilibrium constant.

6. Solutions

Different methods for expressing the concentration of a solution: molality, molarity, mole fraction, percentage (by volume and mass both), the vapour pressure of solutions and Raoult’s Law;

Ideal and non-ideal solutions, vapour pressure – composition, plots for ideal and non-ideal solutions;

Colligative properties of dilute solutions, relative lowering of vapour pressure, depression of freezing point, elevation of boiling point and osmotic pressure;

Determination of molecular mass using colligative properties;

Abnormal value of molar mass, Hoff factor, and its significance.

7. Equilibrium

Meaning of equilibrium, the concept of dynamic equilibrium;

Equilibria involving physical processes: Solid – liquid, liquid – gas and solid – gas equilibria, Henry’s law, a general characteristic of equilibrium involving physical processes;

Equilibria involving chemical processes: Law of chemical equilibrium, equilibrium constants (Kp and Kc) and their significance, the significance of Delta G and Delta Go in chemical equilibria, factors affecting equilibrium concentration, pressure, temperature, the effect of the catalyst;

Le Chatelier’s principle;

Ionic equilibrium: Weak and strong electrolytes, ionization of electrolytes, various concepts of acids and bases (Arrhenius, Bronsted-Lowry and Lewis) and their ionization, acid-base equilibria (including multistage ionization) and ionization constants, ionization of water, pH scale, common ion effect, hydrolysis of salts and pH of their solutions, solubility of sparingly soluble salts and solubility products, buffer solutions.

8. Redox Reactions and Electrochemistry

Electronic concepts of oxidation and reduction, redox reactions, oxidation number, rules for assigning oxidation number, balancing of redox reactions;

Electrolytic and metallic conduction, conductance in electrolytic solutions, specific and molar conductivities and their variation with concentration;

Kohlrausch’s law and its applications;

Electrochemical cells: Electrolytic and Galvanic cells, different types of electrodes, electrode potentials including standard electrode potential, half – cell and cell reactions, emf of a Galvanic cell and its measurement;

Nernst equation and its applications; Relationship between cell potential and Gibbs’ energy change;

Dry cell and lead accumulator, Fuel cells;

Corrosion and its prevention.

9. Chemical Kinetics

The rate of a chemical reaction, factors affecting the rate of reactions: concentration, temperature, pressure, and catalyst.

Elementary and complex reactions, order and molecularity of reactions, rate law, rate constant and its units, differential and integral forms of zero and first order reactions, their characteristics and half-lives, the effect of temperature on the rate of reactions.

Arrhenius theory, activation energy and its calculation, collision theory of bimolecular gaseous reactions (no derivation).

10. Surface Chemistry

Adsorption: Physisorption and chemisorption and their characteristics, factors affecting the adsorption of gases on solids: Freundlich and Langmuir adsorption isotherms, adsorption from solutions.

Catalysis: Homogeneous and heterogeneous, activity and selectivity of solid catalysts, enzyme catalysis, and its mechanism.

Colloidal state: Distinction among true solutions, colloids, and suspensions, classification of colloids: lyophilic, lyophobic.

Multimolecular, macromolecular and associated colloids (micelles), preparation and properties of colloids: Tyndall effect, Brownian movement, electrophoresis, dialysis, coagulation, and flocculation.

Emulsions and their characteristics.

Section B: Inorganic Chemistry
Unit Number Topic Sub-topics
11. Classification of Elements and Periodicity in Properties

Modern periodic law and present form of the periodic table.

s, p, d and f block elements.

Periodic trends in properties of elements atomic and ionic radii, ionization enthalpy.

Electron gain enthalpy, valence, oxidation states and chemical reactivity.

12. General Principles and Process of Isolation of Metals

Modes of occurrence of elements in nature, minerals, ores.

Steps involved in the extraction of metals: concentration, reduction (chemical and electrolytic methods) and refining with special reference to the extraction of Al, Cu, Zn, and Fe.

Thermodynamic and electrochemical principles involved in the extraction of metals.

13. Hydrogen

The position of hydrogen in periodic table, isotopes, preparation, properties, and uses of hydrogen.

Physical and chemical properties of water and heavy water.

Structure, preparation, reactions, and uses of hydrogen peroxide.

Classification of hydrides: ionic, covalent and interstitial.

Hydrogen as a fuel.

14. S Block Elements (Alkali and Alkaline Earth Metals)

Group 1 and Group 2 Elements: General introduction, electronic configuration and general trends in physical and chemical properties of elements, anomalous properties of the first element of each group, diagonal relationships.

Preparation and properties of some important compounds: sodium carbonate, sodium chloride, sodium hydroxide and sodium hydrogen carbonate.

Industrial uses of lime, limestone, Plaster of Paris and cement.

The biological significance of Na, K, Mg and Ca.

15. P Block Elements

Group 13 to Group 18 Elements: General Introduction, Electronic configuration, and general trends in physical and chemical properties of elements across the periods and down the groups; unique behaviour of the first element in each group. Groupwise study of the p block elements.

Group 13: Preparation, properties, and uses of boron and aluminium; Structure, properties and uses of borax, boric acid, diborane, boron trifluoride, aluminium chloride, and alums.

Group 14: Tendency for catenation; Structure, properties, and uses of allotropes and oxides of carbon, silicon tetrachloride, silicates, zeolites, and silicones.

Group 15: Properties and uses of nitrogen and phosphorus; Allotropic forms of phosphorus; Preparation, properties, structure, and uses of ammonia, nitric acid, phosphine and phosphorus halides, (PCl3, PCl5); Structures of oxides and oxoacids of nitrogen and phosphorus.

Group 16: Preparation, properties, structures and uses of dioxygen and ozone; Allotropic forms of sulfur; Preparation, properties, structures, and uses of sulfur dioxide, sulphuric acid (including its industrial preparation); Structures of oxoacids of sulfur.

Group 17: Preparation, properties, and uses of chlorine and hydrochloric acid; Trends in the acidic nature of hydrogen halides; Structures of Interhalogen compounds and oxides and oxyacids of halogens.

Group 18: Occurrence and uses of noble gases; Structures of fluorides and oxides of xenon.

16. D and F Block Elements

Transition Elements: General introduction, electronic configuration, occurrence and characteristics, general trends in properties of the first-row transition elements: physical properties, ionization enthalpy, oxidation states, atomic radii, colour, catalytic behaviour, magnetic properties, complex formation, interstitial compounds, alloy formation.

Preparation, properties, and uses of K2Cr2O7 and KMnO4.

Inner Transition Elements: Lanthanides, Electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction, and Actinoids: Electronic configuration and oxidation states.

17. Coordination Compounds

Introduction to coordination compounds, Werner’s theory.

ligands, coordination number, denticity, chelation.

IUPAC nomenclature of mononuclear coordination compounds, isomerism.

Bonding-Valence bond approach and basic ideas of Crystal field theory, colour and magnetic properties.

Importance of coordination compounds (in qualitative analysis, extraction of metals and in biological systems).

18. Environmental Chemistry

Environmental pollution: Atmospheric, water, and soil.

Atmospheric pollution: Tropospheric and stratospheric.

Gaseous pollutants: Oxides of carbon, nitrogen, and sulfur, hydrocarbons; their sources, harmful effects, and prevention.

Greenhouse effect and Global warming, acid rain.

Particulate pollutants: Smoke, dust, smog, fumes, mist; their sources, harmful effects, and prevention.

Stratospheric pollution: Formation and breakdown of ozone, depletion of ozone layer its mechanism and effects.

Water Pollution: Major pollutants such as pathogens, organic wastes, and chemical pollutants; their harmful effects and prevention.

Soil pollution: Major pollutants such as Pesticides (insecticides, herbicides and fungicides) their harmful effects and prevention.

Strategies to control environmental pollution.

Section C: Organic Chemistry
Unit Number Topic Sub-topics

Purification and Characterisation of Organic Compounds

Purification: Crystallization, sublimation, distillation, differential extraction, and chromatography principles and their applications.

Qualitative analysis: Detection of nitrogen, sulfur, phosphorus, and halogens.

Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulfur, phosphorus.

Calculations of empirical formula and molecular formulae; Numerical problems in organic quantitative analysis.


Some Basic Principles of Organic Chemistry

Tetravalency of carbon; Shapes of simple molecules – hybridization (s and p).

Classification of organic compounds based on functional groups: -C = C- and those containing halogens, oxygen, nitrogen, and sulfur; Homologous series.

Isomerism: structural and stereoisomerism.

Nomenclature (Trivial and IUPAC): Covalent bond fission Homolytic and heterolytic: free radicals, carbocations, and carbanions; stability of carbocations and free radicals, electrophiles and nucleophiles.

Electronic displacement in a covalent bond: Inductive effect, electromeric effect, resonance, and hyperconjugation.

Common types of organic reactions: Substitution, addition, elimination, and rearrangement.



Classification, isomerism, IUPAC nomenclature, general methods of preparation, properties and reactions.

Alkanes: Conformations; Sawhorse and Newman projections (of ethane); Mechanism of halogenation of alkanes.

Alkenes: Geometrical isomerism.

Mechanism of electrophilic addition: addition of hydrogen, halogens, water, hydrogen halides (Markownikoff’s and peroxide effect); Ozonolysis, oxidation, and polymerization.

Alkynes: Acidic character; Addition of hydrogen, halogens, water and hydrogen halides; Polymerization.

Aromatic hydrocarbons: Nomenclature, benzene structure and aromaticity.

Mechanism of electrophilic substitution: halogenation, nitration, Friedel Crafts alkylation and acylation, directive influence of the functional group in monosubstituted benzene.


Organic Compounds Containing Halogens

General methods of preparation, properties, and reactions.

Nature of C-X bond.

Mechanisms of substitution reactions.

Uses, Environmental effects of chloroform, iodoform, freons, and DDT.


Organic Compounds Containing Oxygen

General methods of preparation, properties, reactions, and uses.

Alcohols: Identification of primary, secondary and tertiary alcohols; mechanism of dehydration.

Phenols: Acidic nature, electrophilic substitution reactions: halogenation, nitration, and sulphonation, Reimer Tiemann reaction.

Ethers: Structure.

Aldehyde and Ketones: Nature of carbonyl group; Nucleophilic addition to >C=O group, relative reactivities of aldehydes and ketones.

Important reactions such as Nucleophilic addition reactions (addition of HCN, NH3 and its derivatives), Grignard reagent; oxidation; reduction (Wolff Kishner and Clemmensen); the acidity of hydrogen, aldol condensation, Cannizzaro reaction, Haloform reaction.

Chemical tests to distinguish between aldehydes and Ketones.

Carboxylic Acids: Acidic strength and factors affecting it.


Organic Compounds Containing Nitrogen

General methods of preparation, properties, reactions, and uses.

Amines: Nomenclature, classification, structure, basic character and identification of primary, secondary and tertiary amines and their basic character.

Diazonium Salts: Importance in synthetic organic chemistry.



General introduction and classification of polymers, general methods of polymerization addition and condensation, co-polymerization.

Natural and synthetic rubber and vulcanization.

Some important polymers with emphasis on their monomers and uses, polyethene, nylon, polyester, and bakelite.



General introduction and importance of biomolecules.

Carbohydrates: Classification: aldoses and ketoses; monosaccharides (glucose and fructose), constituent monosaccharides or oligosaccharides (sucrose, lactose, maltose) and polysaccharides (starch, cellulose, glycogen).

Proteins: Elementary Idea of amino acids, peptide bond, polypeptides; Proteins: primary, secondary, tertiary and quaternary structure (qualitative idea only), denaturation of proteins, enzymes.

Vitamins: Classification and functions.

B Chemical constitution of DNA and RNA. Biological functions of nucleic acids.


Chemistry in Everyday Life

Chemicals in medicines: Analgesics, tranquilizers, antiseptics, disinfectants, antimicrobials, antifertility drugs, antibiotics, antacids, antihistamines their meaning and common examples.

Chemicals in food: Preservatives, artificial sweetening agents common examples.

Cleansing agents: Soaps and detergents, cleansing action.


Principles Related to Practical Chemistry

Detection of extra elements (N, S, halogens) in organic compounds.

Detection of the following functional groups: hydroxyl (alcoholic and phenolic), carbonyl (aldehyde and ketone), carboxyl and amino groups in organic compounds.

The chemistry involved in the preparation of the following: Inorganic compounds: Mohr’s salt, potash alum, and Organic compounds: Acetanilide, p-nitro acetanilide, aniline yellow, iodoform.

The chemistry involved in the titrimetric exercises: Acids bases and the use of indicators, oxalic-acid vs KMnO4, Mohr’s salt vs KMnO4.

Chemical principles involved in the qualitative salt analysis: Cations: Pb2+, Cu2+, AI3+, Fe3+, Zn2+, Ni2+, Ca2+, Ba2+, Mg2+, NH4+, and Anions: CO32-, S2-, SO42-, NO2-, NO3-, CI-, Br, I. (Insoluble salts excluded).

Chemical principles involved in the following experiments: Enthalpy of solution of CuSO4, Enthalpy of neutralization of strong acid and strong base, Preparation of lyophilic and lyophobic sols, and Kinetic study of the reaction of iodide ion with hydrogen peroxide at room temperature.

Must Read

Topic-wise Weightage

Topic-wise Weightage of JEE Main Chemistry Syllabus 2021

Chemistry questions are often well spread out amongst various topics, the topic wise weightage of chemistry questions with respect to number of questions and marks is as follows:


Number of Questions


Transition Elements and Coordination Chemistry



Periodic table and Representative Elements



Thermodynamics And Gaseous State



Atomic Structure



Chemical Bonding



Chemical And Ionic Equilibrium



Solid State And Surface Chemistry



Nuclear Chemistry And Environment



Mole Concept



Redox Reaction






Chemical Kinetics



Solution and Colligative Properties



General Organic Chemistry









Alkyl Halides



Carboxylic Acid and their Derivatives



Carbohydrates,amino acid and Polymers



Aromatic Compounds



Video Lectures for Online Prep

Video Lectures for JEE Main Chemistry Preparation

NTA has provided online video lectures by IIT Faculty and experts for the preparation of JEE Main Chemistry section . The steps to access the video lectures are as follows:

  • Visit the official website of NTA i.e.


  • You will be redirected to the page containing the name of different subjects. 

  • Choose the video lecture by clicking on the subject. 

Direct Link to JEE Main Chemistry Video Lectures

Online Mock Tests

JEE Main Chemistry Online Mock Tests

Analyzing your approach towards the exam is one of the most important aspects of the preparation. One must constantly check if their strategies for the exam are accurate and how good their hold is on various concepts with the help of mock tests.

NTA provides official mock tests for the assistance of candidates. These official mock tests can be accessed by the mock test from the official website of NTA A total of 18 mock tests have been released on the official website of NTA in which 15 tests are for Paper 1 while 3 are for Paper 2. Mock Tests can be accessed in English, Hindi, and Gujarati language. 

Must Read

Difficulty Level Analysis

Difficulty Level Analysis of JEE Main Chemistry January 2021 Session

The level of difficulty of JEE Main Chemistry section varies in different sessions. For the understanding of candidates, a basic distribution of number of questions in terms of difficulty level of B.E/ B. Tech paper of JEE Main 2020 January session is tabulated below:

















Although as per the above analysis, chemistry seems to be the toughest section in the January B.E/ B.Tech paper but candidates must keep in mind that level of difficulty is a subjective concern and chemistry still remains one of the most quick in terms of attempting and scoring sections.

Why should Candidates Attempt Chemistry First in JEE Main B.E/ B. Tech Paper?

It is often advised by experts out of three sections of B.E/ B. Tech paper of JEE Main, chemistry should be attempted first. 

  • Chemistry questions include a major portion of fact based questions. Therefore solving them first will be a quick process. The extra time left can be then utilized for the physics and maths sections which are considered more time consuming. 

  • In chemistry too, It is a good move to start with questions of inorganic chemistry, for example, reading well through chapters like P, S-block and Classification of elements and periodicity in property. Questions from these topics are direct and can be answered through direct application of knowledge of concepts.

  •  Experts suggest that the entire JEE Main Chemistry section should be solved in not more than 40-45 minutes.

  • The advisable order within the chemistry section of B.E/ B. Tech paper is Inorganic chemistry ( 6- 8 min) followed by Organic chemistry ( 12- 15 min) followed by Physical chemistry ( 15 - 17 min). The 5 numerical value based questions have to be solved in the remaining time out of the total of 40-45 minutes.

Must Read Interviews of JEE Main 2020 Toppers (NTA Score 100)

Tips by IITians

Maximize your Score in JEE Main Chemistry with Section-wise Tips by IITians 

How to tackle JEE Main Physical Chemistry?

  • Physical Chemistry is the most liked section of chemistry by almost every student because it requires no intense memorization of chemical reactions. Physical chemistry has a lot many constants and involves various calculations, so to excel in physical chemistry the golden rule is to practice as much as you can.
  • Class 11th Physical chemistry is relatively tougher than that of class 12th. Topics like Ionic Equilibrium and Thermodynamics are the toughest ones and requires in-depth knowledge of theory as well as practice to solve their questions on the day of examinations. NCERT textbook is the best for theory for both these chapters and for problem-solving, books of N. Avasthi book can be useful.
  • Topics like Atomic structure, Chemical Equilibrium, Gaseous state and Mole Concepts are easy and scoring too. Atomic structure must be focussed with greater efforts because the same chapter is in class 12th physics also and the content is almost same.
  • On the contrary to class 11th, the Physical Chemistry of class 12th is much easier and scoring too. Chapters like Solid State, Solutions, Chemical kinetics are easy which makes it easy to  score in physical chemistry. The only intriguing chapter in class 12th is Electrochemistry. This chapter also requires in-depth knowledge of theory then only you can solve questions of this chapter. The Level-2 problems in N. Avasthi book are really very good and will help you build a good foundation for this chapter.
  • Lastly, Surface Chemistry is a completely theoretical chapter but very rewarding because 1 question from this chapter directly from the NCERT textbook is present in both JEE Mains as well as in JEE Advanced.
  • Class 12th has more weightage than 11th. Topics like Solid State, Solutions, Chemical kinetics, Atomic Structure are easy and almost 2 questions from each of these chapters are present in every competitive exam. Thermodynamics, Ionic equilibrium and Electrochemistry are a bit tough so practice these topics more efficiently.

For physical chemistry practice is the key to success, so books with good questions becomes very important. For theory preparation, read NCERT textbooks and class notes (of school or coaching) only because side books contain additional topics too which are not in the syllabus of any exam. For practicing questions refer books by:

  • N. Avasthi
  • P.Bahadur
  • R.C Mukharjee
  • O.P. Tandon

How to tackle JEE Main Organic Chemistry?

  • Approximately 33% of the Chemistry questions in JEE Main are from Organic Chemistry with equal weightage to the syllabus of class XI and XII. Though questions from this section appear to be tough to some people, they consume very little time if one has proper knowledge of this section of the subject. 
  • The students should have a clear understanding of the facts and concepts of Organic chemistry while solving the questions because often the options are confusing and people make mistakes because of their vague understanding of facts. So, to have a clear understanding of the subject the first and foremost thing we should do is study NCERT thoroughly and complete all the exercises with full dedication because many times questions come directly from NCERT.
  • The most important topic in the subject is General Organic Chemistry because the concepts, mechanisms, and exceptions taught in this topic are used in all the later chapters of Organic Chemistry. 
  • There are some very easy topics that are in the JEE Mains syllabus which can fetch marks even if one prepares them a month before the exams. These topics are Biomolecules and polymers, Chemistry in Everyday Life, and Classification of elements in Organic Compound.
  • Organic Chemistry also requires a lot of practice because there are many variations of questions. But since questions from this section consume very little time so we can practice lots of questions. One should completely understand the concepts of resonance, acidity, and basicity and practice all sorts of questions related to these because these concepts are used in almost every Organic Chemistry chapter, and often question are asked to determine the order of acidity or basicity.
  • “One thing which I would suggest everyone do is to prepare a list of exceptional behaviors of reagents and substrates after every chapter as it would prove to be a very useful tool while revising the chapters. I would also suggest practicing solving Organic Chemistry questions for at least 30 to 45 minutes every day to gain complete mastery over the topics.”
  • The most important thing which can fetch very good marks in Organic Chemistry in both JEE Advanced and JEE Mains is the knowledge of mechanisms of reactions and the reagents used in the reactions because they determine what product would be formed in the reactions, so knowledge of these topics is a must. Aromatic compounds and their reactions are also very important, they come every year on the question paper. For example,
JEE Main Chemistry
  •  For other reference books, one can use ‘MS Chauhan Organic Chemistry’, it contains a vast variety of questions which can help to get a complete understanding of the topics, and for theory, apart from NCERT, one can use ‘GRB Organic Chemistry by OP Tandon’ or ‘Organic Chemistry for JEE Main and Advanced by Ranjeet Shahi’. Apart from these books, solving past year questions is also a must-do for every student. 

How to tackle JEE Main Inorganic Chemistry?

  • Inorganic chemistry makes up almost 50% of the plus two chemistry syllabus, even though it is a widely neglected topic due to the requirement of memorization of innumerable facts and exceptions rather than core concepts, unlike the organic part. 
  • However, this part also guarantees edge over the other co-participants if one can master it. Unlike organic chemistry which includes hundred of complex reaction mechanisms, grasping few concepts and continuous revision of exceptions on a daily basis will ensure an easy sail through the inorganic chapters. 
  • For higher secondary examination the marks distribution remains almost the same for both classes 11 and 12 which is 39/70. Hence more than half the paper is dedicated to the inorganic section which actually makes it scoring for students who have been wise enough to prepare this part.
  • Coming to the preparation strategy, all you need is NCERTS of class 11 -12 which comes in two parts, accompanied by just one good reference book. 
  • NCERTs cover all the basic concepts in a lucid way and each line of the book should be read thoroughly as many times as you require to grasp it. Keeping highlighters to mark the important lines is a good idea as many students do. You may keep a notebook to jot down important parts, reactions, and exceptions which you may revise later. Using sticky papers and keeping them within the chapters in the book itself is a better idea as it will help in quick revision whenever you open the books to glance through the chapters before your D-day.
  • The exceptions, important reactions as those from salt analysis, redox chapters, periodic tables can be drawn on sheets and stuck on the walls too as continuous visualization helps the memory to retain better.
  • Next is how much time one needs to allot for this section. This is an easier section which only needs your patience and memory. In a year-round approach, revise the chapters as they are taught in your schools or coaching center on the same day itself (p.s. don’t keep for last-minute revisions) and afterward keep revisiting them on weekends. 
  • After the syllabus is over, dedicate at least 1 hour to revise the chapters with special focus on exceptions every day, with time it will take lesser time, say 30-45 mins. Questions are mostly asked from exceptions and reactions in competitive exams, hence that should be the priority.
  • Some of the reference books referred by toppers are J.D Lee, O.P Tandon. And for problem-solving you can refer a book by Cengage publication or “problems in inorganic chemistry “by VK Jaiswal. Anyone and mind you just one is enough.
  •  For JEE Main, only 17-18 questions are asked on an average, plus two preparation (exceptions most importantly) along with lot of MCQs practice will be fine. Take notes of important points while you solve MCQs, that will really help you to cover all the topics in a shorter time. If reading doesn’t help, one may also refer the online videos by Byju ‘s and Kaysons as these are the best two.
  • NCERTs should act as your Bible supplemented with a lot of problem-solving. Consistent revision of all the concepts and exceptions will surely give you a perfect score in the subject.

Preparation & Attempting Tips

JEE Main 2021 Chemistry- Preparation and Paper Attempting Tips

Being the most scoring section, chemistry often turns out to be a major rank uplifter for one’s overall performance in JEE Main. However, chemistry is often proves troublesome in terms of preparation for candidates, here are some tips that can assist the candidates in their preparation for JEE Main Chemistry:

  • Use limited and accurate resources: Don’t try to cover the syllabus from multiple sources, you must practice from NCERT well. Other than that, you can read different concepts from a few acknowledged sources. Make voice notes or written notes and revise them regularly. 

  • Solve Questions Everyday: Retention is one of the factors resulting in a good attempt in the chemistry section, and retention can only be assured with practice. Candidates should make a habit of solving 40-50 questions on a daily basis. Whether you mix the questions from various topics or handle questions from a specific topic everyday totally depends on you.The way to maximize your score in Chemistry is to ensure a balance between analytical skills and memorization skills.

  • Identify answers through approximations: It is not wise to test your mathematics skills while solving the chemistry questions. You must remember that the time is limited and solve accordingly. Candidates can get an approximate answer and pick the option closest to it, unless the options are really close to each other.

  • Practice with previous year papers and mock tests: Practicing is the most essential component of your preparation as per all the experts. Practice and analyze your performance constantly to know the productivity of your current plan. 

  • Invest your time wisely: The importance of time management in the chemistry paper is of utmost importance, candidates can save time in direct questions and invest the same in questions that will take longer in terms of attemption. 

Best Reference Books

Best Reference Books to Cover JEE Main Chemistry Syllabus 2021

While NCERT textbooks of class XI and XII are considered the best source of preparation for JEE Main Chemistry Section as many direct questions are asked form these texts, here is a list of some other books that can be of help to candidates:



P Bahadur

Concept of Physical Chemistry for JEE Main & Advanced 

N Awasthi

Physical Chemistry

Solomons and Fryhle

Organic Chemistry

Morrison and Boyd

Organic Chemistry

R.K Gupta

Arihant's Practice Book Chemistry for JEE Main And Advanced

J D Lee

Concise Inorganic Chemistry

Freedman and Young

University Chemistry

MS Chauhan

Elementary problems in Organic Chemistry

O.P. Tandon

Physical Chemistry; Organic Chemistry


Physical Chemistry

R.C. Mukherjee

Modern Approach to Chemical Calculations

*The article might have information for the previous academic years, which will be updated soon subject to the notification issued by the University/College.

JEE Main 2021 : 17 answered questions


Ques. What are the basic criteria required for joining PEC Chandigarh?

● Top Answer By Shobhna Chaturvedi on 02 May 21

Ans. Below are the procedures to get admission in undergraduate courses at PEC Chandigarh.  You will have to score at least 75% in your board exam, it is the basic criteria to appear in JEE Main. Appear and secure a good score in JEE Main. You will get three consecutive attempts for JEE Main. Admission at PEC is purely based on JEE Main score. You can check the recent cutoff for PEC on the official website to get an idea of what to expect. All the qualified candidates have to participate in the counseling process and they are allotted seats as per the rank secured in JEE Main and choices elected by them. If you are applying for admission one year after your 10+2, you will need to produce a gap year certificate during counseling. So, these are some eligibility criteria for you to keep a note of.Read more
1 Answer

Ques. What exam must one clear and with what cutoff to get into IIIT Hyderabad?

● Top Answer By suyashi choubey on 19 Mar 21

Ans. There are different examinations to get admission at IIIT Hyderabad. The mode of admission at the institute is as follows.  JEE Main: Ensure that you score 270+ in the JEE Main to get a seat in a course of your interest. Through this mode, you can even take admission for all branches except CLD, CHD. Test and Interview: If you want to get a seat in the CLD or CHD course can definitely go for this mode of admission.  In this mode, you will experience at first a test and after that, all who clear the test will be called for a Personal Interview.  However, there is no definite cutoff for the test, but you need to give your personal best to qualify for the interview. NTSE, KVPY: First, you have to clear a test. Those who qualify for the test are called for a Personal Interview.  From there, candidates are selected for admission. However, this mode of admission is for the CND course only. DASA mode: This mode is especially meant for the students who have studied 11th and 12th(or equivalent) outside India and are valid foreign passport holders. Generally, all branches accept admission through this mode.  A valid SAT II score of above 2000 is a must-needed criterion. SAT I score is taken into consideration in case of ties. Olympiad mode: This mode is only applicable for students who have been selected for training in Science and Linguistics to represent India in International Olympiads.  In this mode, students are chosen through a Personal Interview. Admissions are granted for CSD, ECD, CND, BSD, and CLD branches. Lateral Entry:  In order to get a seat through this mode of admission, there is a test and a personal interview round. Generally, children are admitted to the second year in IIIT-H through lateral entry. As what other colleges teach in 2 years, IIIT-H teaches in the first year itself. This mode of admission is meant for students who have completed their first two years of engineering in either Computer Science or Electronics branch from any other college. Students are admitted to the CSD branch if they were in the Computer Science branch in their college or to ECD if they were in the Electronics branch.Read more
1 Answer

Ques. Which one is better, dropping a year for the BITSAT and JEE, or joining universities such as LPU or Amity?

● Top Answer By Rupesh Biswas on 12 Feb 21

Ans. Every candidate has their own perspectives and reasons for dropping a year or opting for a degree in any institute. It entirely depends upon your thoughts and decisions, and what you actually want from your career. The points mentioned below can be considered as a set of guidelines that would help to choose the right path. There are several choices which you can make in case of admission. You can prefer a good renowned government college and take any available stream in it, or a good private college (BITS, Thapar, etc) and choose your favorite stream. Considering the fact that you are comfortable with the high fees of the private institutes. Having an educational gap (drop) of one year is not a bad thing for a future career. Most candidates get to learn a lot of things from the self-available time, even some have genuine reasons for the drop. So, if you are extremely passionate about a stream, it is absolutely all-right to drop for a year. Check for the 50% quota for insiders in your home state NIT. If present, it will increase the chances of getting some stream in it. Usually, it is considered that the stream matters much less. What matters is the college name tag. There are several other institutes like Punjab University, UIET, etc which provide good infrastructure and opportunities. JAC is a committee for counseling in some good institutes in Chandigarh. These are some of the basics tips that would help you in the decision-making process.Read more
1 Answer

Ques. Which is better: JEE or BITSAT?

● Top Answer By Aniket Atul Mahulikar on 20 Jan 21

Ans. Both JEE and BITSAT are competitive entrances and comparing the two is not a good decision. Instead, try to focus on understanding the basics and concepts since the syllabus for the two entrances is pretty much the same. If you prepare religiously for JEE Advanced then you will be able to ace all engineering entrance exams including JEE Main and BITSAT. The table given below gives a brief comparison of the exams: Exam JEE Advanced BITSAT Mode of Exam Computer-based Test Computer-based Test Duration 3 Hours 3 Hours Type of Questions Multiple Choice Questions, Numerical Aptitude Questions Multiple Choice Questions Negative Marking Yes Yes  Syllabus Physics, Chemistry, Maths Physics, Chemistry, Maths, English and Logical Reasoning  JEE Preparation: JEE Advanced paper includes questions primarily from Physics, Chemistry and Maths, thus, try to give these topics enough time and practice.  While it is best to focus on JEE Advanced, it is equally important to prepare for BITSAT since the exam syllabus contains not only Physics, Chemistry, and Maths but also English and Logical Reasoning. BITSAT Preparation: Cracking BITSAT is all about technique and speed so try to practice online mock tests, previous year papers, and cover topics like English and Logical Reasoning to score better in the exams.  You should devote at least 3 months to BITSAT, three months are enough if you have a clear understanding of your basics and a strong foundation. Try not to compare the two exams; instead, focus on clearing your basics with the aim of cracking JEE Advanced so that you can score well in both JEE and BITSAT.Read more
1 Answer

Ques. Which books have you used for the JEE Main and the BITSAT?

● Top Answer By Sudeshna Bhar on 20 Jan 21

Ans. There are several books you can refer to for the preparation of JEE Main and BITSAT exams. But the most important thing to do is to focus on NCERTs and practice online mock tests, previous year question papers, and question banks for every subject. It is equally important to study the exam pattern, type of questions, and syllabus of JEE Main and BITSAT before purchasing any reference book.  Subjectwise Books for JEE Main and BITSAT- Physics: Concepts of Physics by H.C. Verma: The best book for Physics. The book contains several practice questions for you to solve. Fundamental Physics by Halliday, Resnick, and Walker: It contains all the relevant topics. Understanding Physics by DC Pandey: This is the ideal book for JEE entrances; it covers all the relevant questions and topics.  Prep Guide to BITSAT by Arihant publications is a good book for BITSAT. Chemistry: Physical Chemistry: Modern Approach to Chemical Calculations by RC Mukherjee. It contains several practice questions for your reference. Organic Chemistry: A book by Paula Y. Bruice: It is the best for clearing doubts and building a strong foundation in Organic Chemistry. Inorganic Chemistry: Concise Inorganic Chemistry by J.D.Lee: The book covers all the relevant topics and contains several questions The Cengage set of 6 books by KS Verma. Mathematics: New Pattern JEE Mathematics Arihant Publications by SK Goyal. Algebra, Different Calculus, Integral Calculus, Vector, and 3D Geometry by Arihant Publication. A problem book in mathematical Analysis by G.N. Berman Mathematics for JEE Advanced by G.Tewani IIT Mathematics for JEE by M.L. Khanna. Play with graphs by Amit Agrawal. Algebra by G Tewani All these books are great reference books for BITSAT and JEE Main but you must try to focus on NCERTs and practicing questions.Read more
1 Answer


sunny pandey
What is the negatice marking in the paper?
common admission test

Hii Sunny, Greetings from collegedunia. For MCQ types of questions 1 is deducted for each incorrect response and for Non-MCQ questions no negative marking for incorrect answers or unattempted questions. For more details Click Here

Shall I enrol for mock test paper series for the preparation?
abdul nazir

No there is no need to enrol for the mock tests but you need to enter the official website with valid login credentials to attempt the same. There are more than 30 mock test papers available for both paper 1 and 2, which can be downloaded as well. Check details at JEE Main mock test 2021.

vikram dewan
Do I need to cover all the topics or can I leave a few of them?
abdul nazir

Hi Vikram, It is important to cover the topics as per the syllabus to improve your chances of selection, however there are few topics that carries low weightage which can be skipped if you have less time in hand.

There has been few changes in the pattern this year owing to reduction in syllabus by CBSE. To know details visit JEE Main exam pattern.

rinki mahapatra
What is the weightage of periodic classification of elements?
abdul nazir

Hi Rinki, Classification of elements fall under inorganic chemistry and there will 1 or 2 questions from this topic. Therefore weightage will be around 4 to 8 percent. For Chemistry section, there will be 30 questions and you need to answer 25 at least. There will be 10 NAT questions included. To know more visit JEE Main 2021.

mohammed najamuddin
Is there any negetive marking?

Hi Mohammed

For each correct anwer in your MCQs you will be rewared with +4 and -1 for wrong attempt. For Non-MCQs You will be rewarded +4 for each correct answers but there is not negeative marketing for wrong or unattempts questions.

ambar ahirawar
How shall I finish the syllabus within 4 months?
rakhisree chatterjee

Hi, Some of the tips are Complete Your Syllabus. First step is to study and understand the entire course at least once. Revise Your Syllabus. This is the trickiest and the most important part. Practice full length papers. 

bhagyashri kene
How many marks are cut for one wrong answer?

Hi Bhagyashi

Greetings of the day

The marking pattern is as follows.

For each right answer you will be rewarded with +4 marks and for each wrong answer you will get -1 marks and the unattempt questions will me unmarked.

sandesh kumar
Is there any negative marking? If yes, then how much?
common admission test

Hii Sandesh, Greetings from collegedunia. Yes, their is negative marks for each incorrect answer, your 1 mark will be deducted. For more details Click Here

surabhi s
Can I prepare for JEE and BITSAT similarly?
arvind kumar

Hi Surabhi, You can prepare for JEE and BITSAT similarly as both the exams are a little similar. For details visit: JEE MAIN EXAM

sandesh kumar
Has there been reduction in weightage of any chapter?
rakhisree chatterjee

Hi, Almost 30% of syllabus has been reduced for CBSE, and JEE Main 2021 aspirants can start preparing as per the revised syllabus. The official syllabus for JEE Main 2021 will be released soon.

bhagyashri kene
Which one has more weightage, inorganic chemistry or Organic Chemistry?

Hi Bhagyshri. As a result of revised pattern of JEE mains, weightage of inorganic and organic chemistry is nearly equal.