JEE Main · Chemistry

JEE Main Chemistry Syllabus 2026-2027

Complete official syllabus for JEE Main Chemistry with data-backed unit weightage, Class 11 vs Class 12 split, and links to practice on Fundamenthol.

Last updated: 2026-08-05T00:00:00+05:30

At a Glance

Total topics

169

Total concepts

Topic-wise Syllabus & Weightage

Unit 1

Some Basic Concepts in Chemistry

1.95% weightage

Practice this topic

→Some Basic Concepts of ChemistryClass 111.95%

Concepts (9)

Matter and its nature
Dalton's atomic theory
Concept of atom, molecule, element, compound
Laws of chemical combination
Atomic and molecular masses
Mole concept, molar mass
Percentage composition
Empirical and molecular formulae
Chemical equations and stoichiometry

Unit 2

Atomic Structure

4.98% weightage

Practice this topic

→Atomic StructureClass 114.98%

Concepts (16)

Nature of electromagnetic radiation
Photoelectric effect
Spectrum of hydrogen atom
Bohr model: postulates, derivation of energy and radii
Limitations of Bohr's model
Dual nature of matter, de Broglie's relationship
Heisenberg uncertainty principle
Quantum mechanical model of atom
Atomic orbitals as one-electron wave functions
Variation of ψ and ψ² with r (1s, 2s orbitals)
Quantum numbers (principal, angular momentum, magnetic) and significance
Shapes of s, p, d orbitals
Electron spin and spin quantum number
Aufbau principle, Pauli's exclusion principle, Hund's rule
Electronic configuration
Stability of half-filled and completely filled orbitals

Unit 3

Chemical Bonding and Molecular Structure

5.18% weightage

Practice this topic

→Chemical Bonding And Molecular StructureClass 115.18%

Concepts (13)

Kossel-Lewis approach
Ionic and covalent bonds
Ionic bonding: formation, factors, lattice enthalpy
Covalent bonding: electronegativity, Fajan's rule, dipole moment
VSEPR theory, shapes of simple molecules
Valence bond theory, hybridization (s, p, d orbitals)
Resonance
Molecular Orbital Theory: LCAOs, bonding/antibonding orbitals
Sigma and pi bonds
MO electronic configurations of homonuclear diatomics
Bond order, bond length, bond energy
Metallic bonding (elementary)
Hydrogen bonding and applications

Unit 4

Chemical Thermodynamics

4.00% weightage

Practice this topic

→Chemical ThermodynamicsClass 114.00%

Concepts (9)

System and surroundings
Extensive and intensive properties
State functions, types of processes
First law: work, heat, internal energy, enthalpy
Heat capacity, molar heat capacity
Hess's law
Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, hydration, ionization, solution
Second law: spontaneity, ΔS of universe, ΔG of system
ΔG° and equilibrium constant

Unit 5

Solutions

6.84% weightage

Practice this topic

→SolutionsClass 126.84%

Concepts (7)

Methods of expressing concentration (molality, molarity, mole fraction, %)
Vapour pressure of solutions, Raoult's law
Ideal and non-ideal solutions
Vapour pressure-composition plots
Colligative properties: relative lowering of vapour pressure, depression of freezing point, elevation of boiling point, osmotic pressure
Determination of molecular mass using colligative properties
Abnormal molar mass, van't Hoff factor

Unit 6

Equilibrium

4.59% weightage

Practice this topic

→EquilibriumClass 114.59%

Concepts (16)

Concept of dynamic equilibrium
Equilibria in physical processes (solid-liquid, liquid-gas, gas-gas, solid-gas)
Henry's law
Equilibria in chemical processes
Law of chemical equilibrium, Kp and Kc
Significance of ΔG and ΔG° in equilibrium
Factors affecting equilibrium
Le Chatelier's principle
Ionic equilibrium: weak and strong electrolytes
Concepts of acids and bases (Arrhenius, Bronsted-Lowry, Lewis)
Ionization of acids/bases, ionization constants
Ionization of water, pH scale
Common ion effect
Hydrolysis of salts
Solubility of sparingly soluble salts, solubility products
Buffer solutions

Unit 7

Redox Reactions and Electrochemistry

5.37% weightage

Practice this topic

→ElectrochemistryClass 122.83%→Redox ReactionsClass 112.54%

Concepts (15)

Electronic concepts of oxidation and reduction
Redox reactions
Oxidation number, rules for assigning
Balancing redox reactions
Electrolytic and metallic conduction
Conductance in electrolytic solutions
Molar conductivities, variation with concentration
Kohlrausch's law and applications
Electrochemical cells: electrolytic and Galvanic
Types of electrodes, electrode potentials, standard electrode potential
Half-cell and cell reactions
EMF of Galvanic cell and measurement
Nernst equation and applications
Cell potential and Gibbs energy change
Dry cell, lead accumulator, fuel cells

Unit 8

Chemical Kinetics

4.49% weightage

Practice this topic

→Chemical KineticsClass 124.49%

Concepts (10)

Rate of a chemical reaction
Factors affecting rate (concentration, temperature, pressure, catalyst)
Elementary and complex reactions
Order and molecularity
Rate law, rate constant and units
Differential and integral forms of zero and first-order reactions
Half-lives
Effect of temperature (Arrhenius theory)
Activation energy and calculation
Collision theory of bimolecular gaseous reactions (no derivation)

Unit 9

Classification of Elements and Periodicity in Properties

3.22% weightage

Practice this topic

→Classification Of Elements And Periodicity In PropertiesClass 113.22%

Concepts (5)

Modern periodic law
Present form of periodic table
s, p, d, f block elements
Periodic trends: atomic and ionic radii, ionization enthalpy, electron gain enthalpy
Valence, oxidation states, chemical reactivity

Unit 10

p-Block Elements

3.13% weightage

Practice this topic

→The p-Block Elements: Group 15, 16, 17 And 18Class 121.86%→The p-Block Elements: Group 13 & 14Class 111.27%

Concepts (3)

Group 13 to Group 18 Elements
Electronic configuration, general trends across periods and down groups
Unique behaviour of first element in each group

Unit 11

d- and f-Block Elements

2.25% weightage

Practice this topic

→The d- And f-Block ElementsClass 122.25%

Concepts (4)

Transition elements: electronic configuration, occurrence, characteristics
Trends in 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, uses of K₂Cr₂O₇ and KMnO₄
Inner transition elements:

Unit 12

Coordination Compounds

7.03% weightage

Practice this topic

→Coordination CompoundsClass 127.03%

Concepts (8)

Introduction to coordination compounds
Werner's theory
Ligands, coordination number, denticity, chelation
IUPAC nomenclature of mononuclear coordination compounds
Isomerism
Bonding: Valence bond approach, basic ideas of Crystal field theory
Colour and magnetic properties
Importance (qualitative analysis, extraction of metals, biological systems)

Unit 13

Purification and Characterisation of Organic Compounds

2.44% weightage

Practice this topic

→Purification and Characterisation of Organic CompoundsClass 112.44%

Concepts (5)

Purification: crystallization, sublimation, distillation, differential extraction, chromatography
Qualitative analysis: detection of N, S, P, halogens
Quantitative analysis: estimation of C, H, N, halogens, S, P
Calculations of empirical and molecular formulae
Numerical problems in organic quantitative analysis

Unit 14

Some Basic Principles of Organic Chemistry

5.18% weightage

Practice this topic

→Some Basic Principles of Organic ChemistryClass 115.18%

Concepts (13)

Tetravalency of carbon
Shapes of simple molecules, hybridization (s and p)
Classification based on functional groups
Compounds containing halogens, oxygen, nitrogen, sulphur
Homologous series
Isomerism: structural and stereoisomerism
Nomenclature (Trivial and IUPAC)
Covalent bond fission: homolytic and heterolytic
Free radicals, carbocations, carbanions
Stability of carbocations and free radicals
Electrophiles and nucleophiles
Electronic displacement: inductive effect, electromeric effect, resonance, hyperconjugation
Types of organic reactions: substitution, addition, elimination, rearrangement

Unit 15

Hydrocarbons

5.37% weightage

Practice this topic

→HydrocarbonsClass 115.37%

Concepts (7)

Classification, isomerism, IUPAC nomenclature
General methods of preparation, properties, reactions
Alkanes: conformations (Sawhorse, Newman for ethane), mechanism of halogenation
Alkenes: geometrical isomerism, mechanism of electrophilic addition (H, halogens, water, HX — Markovnikov and peroxide effect), ozonolysis, polymerization
Alkynes: acidic character, addition reactions, polymerization
Aromatic hydrocarbons: benzene structure, aromaticity, electrophilic substitution mechanism, halogenation, nitration, Friedel-Crafts alkylation and acylation
Directive influence of functional group in mono-substituted benzene

Unit 16

Organic Compounds Containing Halogens

4.69% weightage

Practice this topic

→Haloalkanes And HaloarenesClass 124.69%

Concepts (4)

General methods of preparation, properties, reactions
Nature of C-X bond
Mechanisms of substitution reactions
Uses and environmental effects of chloroform, iodoform, freons, DDT

Unit 17

Organic Compounds Containing Oxygen

6.74% weightage

Practice this topic

→Aldehydes And KetonesClass 122.83%→Carboxylic Acids And Their DerivativesClass 122.05%→Alcohols, Phenols And EthersClass 121.86%

Concepts (9)

General methods of preparation, properties, reactions, uses
Alcohols: identification of primary/secondary/tertiary, mechanism of dehydration
Phenols: acidic nature, electrophilic substitution (halogenation, nitration, sulphonation), Reimer-Tiemann reaction
Ethers: structure
Aldehydes and Ketones: nature of carbonyl group, nucleophilic addition, relative reactivities
Reactions: addition of HCN, NH₃ and derivatives, Grignard, oxidation, reduction (Wolf-Kishner, Clemmensen)
Acidity of α-hydrogen, Aldol condensation, Cannizzaro, Haloform
Chemical tests to distinguish aldehydes and ketones
Carboxylic acids: acidic strength and factors affecting it

Unit 18

Organic Compounds Containing Nitrogen

3.13% weightage

Practice this topic

→AminesClass 123.13%

Concepts (3)

General methods of preparation, properties, reactions, uses
Amines: nomenclature, classification, structure, basic character, identification
Diazonium salts: importance in synthetic organic chemistry

Unit 19

Biomolecules

4.49% weightage

Practice this topic

→BiomoleculesClass 124.49%

Concepts (6)

General introduction and importance of biomolecules
Carbohydrates: classification, aldoses, ketoses, monosaccharides (glucose, fructose), constituent monosaccharides of oligosaccharides (sucrose, lactose, maltose)
Proteins: α-amino acids, peptide bond, polypeptides, primary/secondary/tertiary/quaternary structure, denaturation, enzymes
Vitamins: classification and functions
Nucleic Acids: chemical constitution of DNA and RNA, biological functions
Hormones (general introduction)

Unit 20

Principles Related to Practical Chemistry

1.37% weightage

Practice this topic

Concepts (7)

Detection of extra elements (N, S, halogens) in organic compounds
Detection of functional groups: hydroxyl (alcoholic, phenolic), carbonyl, carboxyl, amino
Preparation of inorganic compounds: Mohr's salt, potash alum
Preparation of organic compounds: acetanilide, p-nitro acetanilide, aniline yellow, iodoform
Titrimetric exercises: acids, bases, indicators; oxalic acid vs KMnO₄, Mohr's salt vs KMnO₄
Qualitative salt analysis:
Chemistry of experiments:

Frequently Asked Questions

Is the JEE Main 2027 syllabus the same as 2026?

The JEE Main syllabus has been stable since the 2024 revision by NTA, which trimmed several chapters from the older syllabus. Unless NTA publishes a fresh notification, the 2027 syllabus is expected to remain identical to 2026. This page will update as soon as the official 2027 syllabus is notified.

How much of the JEE Main syllabus is from Class 11 and Class 12?

Across Physics, Chemistry, and Mathematics, the JEE Main syllabus is roughly split 45 to 55 between Class 11 and Class 12 topics. Class 12 chapters typically carry slightly higher weightage in recent years. See the class-wise breakdown on each subject page.

How many units are there in the JEE Main syllabus?

The JEE Main syllabus has 54 units across three subjects: Mathematics (14 units), Physics (20 units), and Chemistry (20 units). Every unit contains multiple NCERT chapters and sub-topics.

Can I download the JEE Main syllabus as a PDF?

The official JEE Main syllabus PDF is available on the NTA website at jeemain.nta.nic.in. On Fundamenthol, we present the same syllabus in a searchable, chapter-linked format with weightage data from tagged previous year questions.

Which are the most important chapters for JEE Main Chemistry?

Coordination Compounds, Solutions, Hydrocarbons, Chemical Bonding, and Some Basic Principles of Organic Chemistry are consistently the top-weightage chapters, together carrying nearly 30 percent of the Chemistry section based on tagged previous year data.

Is Organic Chemistry more important than Inorganic in JEE Main?

In recent years, Organic and Physical Chemistry each contribute around 35 to 40 percent of the Chemistry section, with Inorganic contributing 20 to 30 percent. However, Inorganic Chemistry is often called the easiest scoring area if learnt systematically.

How many chapters does JEE Main Chemistry have?

JEE Main Chemistry syllabus has 20 units divided into Physical Chemistry (Units 1-8), Inorganic Chemistry (Units 9-12), and Organic Chemistry (Units 13-20).