JEE Main 2027 · Chemistry

JEE Main 2027 Chemistry syllabus ranked by weightage.

All 21 chapters of JEE Main Chemistry, Class 11 and 12, ranked by how often they come up in past papers. See what matters most, what to study first, and track every chapter free.

  • 21 chapters
  • 10 Class 11 · 11 Class 12
  • 25 questions · 100 marks
  • 6 very high weightage
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Updated

Most important Chemistry chapters for JEE Main

These chapters come up the most in past JEE Main papers, heaviest first. Give them the most time.

  1. Aldehydes, Ketones & Carboxylic AcidsClass 12
  2. Coordination CompoundsClass 12Highest-yield inorganic chapter; heavily formula/rule driven, so fast to secure.
  3. d- & f-Block ElementsClass 12
  4. SolutionsClass 12
  5. EquilibriumFoundationClass 11Ionic equilibrium feeds electrochemistry and salt analysis.
  6. AminesClass 12

Class 11 Chemistry chapters

JEE Main Chemistry, Class 11 · 10 chapters
#ChapterWeightage
01Some Basic Concepts of ChemistryFoundationMole concept underpins all of physical chemistry.Medium
02Structure of AtomFoundationHigh
03Classification of Elements & PeriodicityFoundationLow direct weight; periodic trends are assumed knowledge across all of inorganic.Lower
04Chemical Bonding & Molecular StructureFoundationHigh
05ThermodynamicsHigh
06EquilibriumFoundationIonic equilibrium feeds electrochemistry and salt analysis.Very high
07Redox ReactionsFoundationPrerequisite for electrochemistry and much of inorganic.Lower
08Organic Chemistry: Basic Principles & TechniquesFoundationLower
09HydrocarbonsFoundationHigh
10Purification & Characterisation of Organic CompoundsSmall and heavily formula-based (Duma, Kjeldahl, Carius) — cheap marks.Lower
Very highHighMediumLowerFoundation other chapters build on it

Class 12 Chemistry chapters

JEE Main Chemistry, Class 12 · 11 chapters
#ChapterWeightage
11SolutionsVery high
12ElectrochemistryHigh
13Chemical KineticsHigh
14d- & f-Block ElementsVery high
15Coordination CompoundsHighest-yield inorganic chapter; heavily formula/rule driven, so fast to secure.Very high
16Haloalkanes & HaloarenesMedium
17Alcohols, Phenols & EthersHigh
18Aldehydes, Ketones & Carboxylic AcidsVery high
19AminesVery high
20BiomoleculesAlmost pure recall — very high marks per hour.High
21The p-Block Elements (Groups 15-18)Groups 13 & 14 were removed from the JEE syllabus; 15-18 remain.High
Very highHighMediumLowerFoundation other chapters build on it

Key topics in the heaviest chapters

Each one is a single study sitting. Work through them in order.

Some Basic Concepts of Chemistry

  1. The mole concept and Avogadro’s number
  2. Empirical and molecular formulae
  3. Stoichiometry and the limiting reagent
  4. Concentration terms and their temperature dependence

Structure of Atom

  1. The Bohr model and where it breaks down
  2. Quantum numbers and the shapes of orbitals
  3. Aufbau principle, Pauli exclusion and Hund’s rule
  4. Dual nature, de Broglie and Heisenberg uncertainty

Classification of Elements & Periodicity

  1. Modern periodic law and the s, p, d, f blocks
  2. Atomic and ionic radii trends
  3. Ionisation enthalpy: trends and the exceptions
  4. Electron gain enthalpy and electronegativity

Chemical Bonding & Molecular Structure

  1. Ionic vs covalent character, Fajans’ rules
  2. VSEPR: predicting shape and bond angles
  3. Hybridisation and its relation to geometry
  4. Molecular orbital theory for diatomics, bond order
  5. Hydrogen bonding and its physical consequences
  6. Dipole moment and molecular polarity

Thermodynamics

  1. System, surroundings and state functions
  2. First law, enthalpy and heat capacity
  3. Hess’s law and enthalpies of reaction
  4. Entropy, spontaneity and Gibbs free energy

Equilibrium

  1. Kp, Kc and the relation between them
  2. Le Chatelier’s principle applied to real shifts
  3. Ionic equilibrium: pH, pOH and strong/weak distinctions
  4. Buffers and the Henderson–Hasselbalch equation
  5. Solubility product and the common ion effect
  6. Salt hydrolysis and predicting the resulting pH

Redox Reactions

  1. Rules for assigning oxidation numbers
  2. Identifying oxidising and reducing agents
  3. Balancing redox equations

Organic Chemistry: Basic Principles & Techniques

  1. IUPAC nomenclature of organic compounds
  2. Structural isomerism and stereoisomerism
  3. Inductive, resonance and hyperconjugative effects
  4. Carbocations, carbanions and free radicals
  5. Types of organic reactions, and electrophiles vs nucleophiles

Hydrocarbons

  1. Alkanes and free radical substitution
  2. Alkenes: electrophilic addition and Markovnikov’s rule
  3. Alkynes: acidity and addition reactions
  4. Aromaticity and electrophilic aromatic substitution
  5. Directive influence of substituents on the benzene ring

Purification & Characterisation of Organic Compounds

  1. Purification: distillation, crystallisation and chromatography
  2. Detection of elements and quantitative estimation

Solutions

  1. Concentration terms and interconverting them
  2. Henry’s law and the solubility of gases
  3. Raoult’s law and relative lowering of vapour pressure
  4. Ideal and non-ideal solutions, and azeotropes
  5. Elevation of boiling point and depression of freezing point
  6. Osmosis and osmotic pressure
  7. van’t Hoff factor and abnormal molar mass

Electrochemistry

  1. Electrochemical cells and standard electrode potential
  2. The Nernst equation and cell EMF
  3. Conductance and Kohlrausch’s law
  4. Electrolysis and Faraday’s laws

Chemical Kinetics

  1. Rate of reaction and the rate law
  2. Order versus molecularity
  3. Integrated rate equations and half-life
  4. Arrhenius equation, activation energy and catalysts

d- & f-Block Elements

  1. General characteristics of the transition metals
  2. Variable oxidation states and the origin of colour
  3. Magnetic properties and catalytic behaviour
  4. Lanthanoids, actinoids and lanthanoid contraction

Coordination Compounds

  1. IUPAC nomenclature of complexes
  2. Oxidation state, coordination number and EAN
  3. Crystal field theory: splitting in octahedral and tetrahedral fields
  4. Spectrochemical series, high spin vs low spin
  5. Magnetic moment from unpaired electrons
  6. Counting isomers: geometrical, optical and linkage
  7. VBT hybridisation and predicting geometry

Haloalkanes & Haloarenes

  1. Nomenclature and methods of preparation
  2. SN1 and SN2 mechanisms
  3. Elimination reactions and Saytzeff’s rule
  4. Why haloarenes resist nucleophilic substitution

Alcohols, Phenols & Ethers

  1. Preparation and physical properties
  2. Acidity of alcohols and phenols
  3. Reactions of alcohols: dehydration and oxidation
  4. Reactions of phenols and their distinguishing tests
  5. Ethers: preparation and cleavage

Aldehydes, Ketones & Carboxylic Acids

  1. Nucleophilic addition and the reactivity order
  2. Aldol and cross-aldol condensation
  3. Cannizzaro reaction and the no-α-hydrogen requirement
  4. Clemmensen vs Wolff–Kishner: choosing by medium
  5. Distinguishing tests: Tollens, Fehling, iodoform
  6. Acidity of carboxylic acids and substituent effects
  7. Conversion sequences and naming the reagent at each arrow

Amines

  1. Classification, preparation and basicity
  2. Reactions of amines and the Hinsberg test
  3. Diazonium salts and their conversions

Biomolecules

  1. Carbohydrates: classification and structure
  2. Amino acids, the peptide bond and protein structure
  3. Nucleic acids, enzymes and vitamins

The p-Block Elements (Groups 15-18)

  1. Group 15: trends, ammonia and nitric acid
  2. Group 16: trends, oxygen and sulphuric acid
  3. Group 17 halogens and Group 18 noble gases

How to use this list

  • Foundations first. Some Basic Concepts of Chemistry, Structure of Atom, Classification of Elements & Periodicity and Chemical Bonding & Molecular Structure look small, but later chapters depend on them.
  • Then the very high chapters. They earn the most marks per hour. Revise them more than once.
  • Never drop a chapter just because its tier is lower. One question can be the difference in rank.
  • Track it. Mark each chapter as started, done or due for revision, so you always know what is left.

How we rank chapters

We compared published analyses of past JEE Main papers from 2020 to 2025. The sources agree on which chapters come up most, but not on exact percentages, so we show tiers instead of numbers that look more precise than they are.

Chapters marked estimate have thin data, so treat their tier as a rough guide. Chapters marked Foundation may carry fewer direct questions, but other chapters depend on them. Do not skip them.

The chapter list follows the current NTA syllabus. The official 2027 syllabus comes with the information bulletin on jeemain.nta.nic.in. We update this page when it changes.

Questions students ask

How many chapters are in JEE Main 2027 Chemistry?

JEE Main Chemistry has 21 chapters: 10 from Class 11 and 11 from Class 12. The full list is on this page.

Which JEE Main Chemistry chapters have the highest weightage?

The heaviest are Aldehydes, Ketones & Carboxylic Acids, Coordination Compounds, d- & f-Block Elements, Solutions and Equilibrium. In all, 6 Chemistry chapters are in the very high tier for JEE Main. Give them the most time, but finish the foundation chapters first.

Which Chemistry chapters should I study first?

Start with the foundation chapters: Some Basic Concepts of Chemistry, Structure of Atom, Classification of Elements & Periodicity, Chemical Bonding & Molecular Structure and Equilibrium. Later chapters build on them, even when they carry fewer direct questions. Then spend most of your time on the very high and high weightage chapters.

Is this the official JEE Main 2027 Chemistry syllabus?

It follows the current NTA syllabus. The official 2027 syllabus is published with the information bulletin on jeemain.nta.nic.in, and we update this page when it changes.