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Chemistry · JEE Main

JEE Main Chemistry chapter-wise weightage (2020–2025)

Computed from every question in 118 JEE Main papers (2020–2025) — 2920 questions mapped to chapters. Not a guess; the actual distribution.

118 papers analysed2920 questions mapped2020–2025
#ChapterWeightagePer paperMost common question types
1Organic Chemistry - Some Basic Principles and TechniquesOrganic Chemistry9.6%~2 Q · ~8 marksCarbocation Stability OrderingIdentifying most/least acidic or basic compound in a setCarius Method Halogen Percentage Calculation
2Coordination CompoundsInorganic Chemistry6.8%~2 Q · ~8 marksSpin-only magnetic moment calculationCFSE calculation from d-orbital occupancyHigh-spin vs low-spin configuration identification
3Chemical Bonding and Molecular StructureInorganic Chemistry6%~1 Q · ~4 marksCount lone pairs to determine geometryClassify multiple species by geometry typeBond Order Calculation and Comparison
4SolutionsPhysical Chemistry5.8%~1 Q · ~4 marksDirect colligative formula applicationDirect Molarity Calculation from Mass/VolumeInterconversion of Molarity, Molality, and Density
5d- and f-Block ElementsInorganic Chemistry5.5%~1 Q · ~4 marksOxidation states and variable valency trendsSpin-only magnetic moment calculationStability of Non-Trivalent Oxidation States
6Aldehydes Ketones and Carboxylic AcidsOrganic Chemistry5.4%~1 Q · ~4 marksAldol Condensation Mechanism and Cross-Aldol AnalysisIodoform and Cannizzaro Reaction EligibilityTollen's / Fehling's Test Applicability
7HydrocarbonsOrganic Chemistry5.3%~1 Q · ~4 marksNamed Reaction Product Identification on AlkenesAromaticity and resonance stabilisation reasoningMulti-step synthesis route design
8Some Basic Concepts in ChemistryPhysical Chemistry4.9%~1 Q · ~4 marksMole-to-mole stoichiometry from balanced equationLimiting reagent identification and yield calculationAcid-base neutralisation equivalence calculation
9Chemical ThermodynamicsPhysical Chemistry4.8%~1 Q · ~4 marksHess's Law algebraic combination of reactionsSign-of-ΔG Spontaneity AnalysisΔH–ΔU interconversion via Δng RT
10EquilibriumPhysical Chemistry4.8%~1 Q · ~4 marksICE Table with Given Extent or PercentageLe Chatelier Perturbation AnalysisKsp from molar solubility formula
11Atomic StructurePhysical Chemistry4.3%~1 Q · ~4 marksBohr Model Orbital Property DerivationRadial/Angular Node CountingPhoton Energy and Photon Count from Power
12Chemical KineticsPhysical Chemistry4.1%~1 Q · ~4 marksHalf-life relationship to completion timeDirect k calculation from concentration-time dataOrder Determination by Initial Rates Method
13Classification of Elements and Periodicity in PropertiesInorganic Chemistry4.1%~1 Q · ~4 marksIsoelectronic species size orderingAcid-base nature of oxides and hydroxidesElectron gain enthalpy anomalies in small atoms
14p-Block ElementsInorganic Chemistry4.1%~1 Q · ~4 marksReaction products and redox of p-block compoundsAssertion–Reason or statement correctness evaluationCounting bonds in oxoacid structures
15BiomoleculesOrganic Chemistry4%~1 Q · ~4 marksStructural properties of specific monosaccharidesCounting structural features in biomolecule structuresProtein structure level identification
16Organic Compounds Containing NitrogenOrganic Chemistry4%~1 Q · ~4 marksIdentification tests and reagent rolesDiazo Coupling to Azo Dye ProductHydrolysis of Diazonium Salt to Phenol
17ElectrochemistryPhysical Chemistry3.7%~1 Q · ~4 marksFaraday's Law mass/mole calculationBattery and electrolytic cell product identificationFull Cell EMF via Nernst Equation
18Redox ReactionsPhysical Chemistry3%~4 marks · ~1 paper in 2Identify oxidising/reducing agent by OS changeDisproportionation via intermediate OSAssign OS using algebraic equation
19Organic Compounds Containing HalogensOrganic Chemistry2.9%~4 marks · ~1 paper in 2SN1 vs SN2 Condition-Based ReasoningMulti-Step Reaction Sequence Product TracingAssertion-Reason on Halide Reactivity
20Alcohols Phenols and EthersOrganic Chemistry2.8%~4 marks · ~1 paper in 2Qualitative Chemical Test Identification and MatchingMulti-Step Sequence Identification via Intermediate CharacterisationGrignard Reaction Retrosynthesis to Identify Carbonyl Precursor
21Principles Related to Practical ChemistryPractical Chemistry2.2%~4 marks · ~1 paper in 2Confirmatory colour test for specific cationGroup-wise reagent-to-cation matchingFreundlich Isotherm Graph Calculation
22Some p-Block ElementsInorganic Chemistry2%~4 marks · ~1 paper in 2True/False Statement Pair EvaluationGroup 13 Periodic Trends and AnomaliesSequential Reaction Product Identification
  1. 1Organic Chemistry - Some Basic Principles and Techniques9.6%

    ~2 Q · ~8 marks per paper

    Carbocation Stability OrderingIdentifying most/least acidic or basic compound in a setCarius Method Halogen Percentage Calculation
  2. 2Coordination Compounds6.8%

    ~2 Q · ~8 marks per paper

    Spin-only magnetic moment calculationCFSE calculation from d-orbital occupancyHigh-spin vs low-spin configuration identification
  3. 3Chemical Bonding and Molecular Structure6%

    ~1 Q · ~4 marks per paper

    Count lone pairs to determine geometryClassify multiple species by geometry typeBond Order Calculation and Comparison
  4. 4Solutions5.8%

    ~1 Q · ~4 marks per paper

    Direct colligative formula applicationDirect Molarity Calculation from Mass/VolumeInterconversion of Molarity, Molality, and Density
  5. 5d- and f-Block Elements5.5%

    ~1 Q · ~4 marks per paper

    Oxidation states and variable valency trendsSpin-only magnetic moment calculationStability of Non-Trivalent Oxidation States
  6. 6Aldehydes Ketones and Carboxylic Acids5.4%

    ~1 Q · ~4 marks per paper

    Aldol Condensation Mechanism and Cross-Aldol AnalysisIodoform and Cannizzaro Reaction EligibilityTollen's / Fehling's Test Applicability
  7. 7Hydrocarbons5.3%

    ~1 Q · ~4 marks per paper

    Named Reaction Product Identification on AlkenesAromaticity and resonance stabilisation reasoningMulti-step synthesis route design
  8. 8Some Basic Concepts in Chemistry4.9%

    ~1 Q · ~4 marks per paper

    Mole-to-mole stoichiometry from balanced equationLimiting reagent identification and yield calculationAcid-base neutralisation equivalence calculation
  9. 9Chemical Thermodynamics4.8%

    ~1 Q · ~4 marks per paper

    Hess's Law algebraic combination of reactionsSign-of-ΔG Spontaneity AnalysisΔH–ΔU interconversion via Δng RT
  10. 10Equilibrium4.8%

    ~1 Q · ~4 marks per paper

    ICE Table with Given Extent or PercentageLe Chatelier Perturbation AnalysisKsp from molar solubility formula
  11. 11Atomic Structure4.3%

    ~1 Q · ~4 marks per paper

    Bohr Model Orbital Property DerivationRadial/Angular Node CountingPhoton Energy and Photon Count from Power
  12. 12Chemical Kinetics4.1%

    ~1 Q · ~4 marks per paper

    Half-life relationship to completion timeDirect k calculation from concentration-time dataOrder Determination by Initial Rates Method
  13. 13Classification of Elements and Periodicity in Properties4.1%

    ~1 Q · ~4 marks per paper

    Isoelectronic species size orderingAcid-base nature of oxides and hydroxidesElectron gain enthalpy anomalies in small atoms
  14. 14p-Block Elements4.1%

    ~1 Q · ~4 marks per paper

    Reaction products and redox of p-block compoundsAssertion–Reason or statement correctness evaluationCounting bonds in oxoacid structures
  15. 15Biomolecules4%

    ~1 Q · ~4 marks per paper

    Structural properties of specific monosaccharidesCounting structural features in biomolecule structuresProtein structure level identification
  16. 16Organic Compounds Containing Nitrogen4%

    ~1 Q · ~4 marks per paper

    Identification tests and reagent rolesDiazo Coupling to Azo Dye ProductHydrolysis of Diazonium Salt to Phenol
  17. 17Electrochemistry3.7%

    ~1 Q · ~4 marks per paper

    Faraday's Law mass/mole calculationBattery and electrolytic cell product identificationFull Cell EMF via Nernst Equation
  18. 18Redox Reactions3%

    ~4 marks · ~1 paper in 2

    Identify oxidising/reducing agent by OS changeDisproportionation via intermediate OSAssign OS using algebraic equation
  19. 19Organic Compounds Containing Halogens2.9%

    ~4 marks · ~1 paper in 2

    SN1 vs SN2 Condition-Based ReasoningMulti-Step Reaction Sequence Product TracingAssertion-Reason on Halide Reactivity
  20. 20Alcohols Phenols and Ethers2.8%

    ~4 marks · ~1 paper in 2

    Qualitative Chemical Test Identification and MatchingMulti-Step Sequence Identification via Intermediate CharacterisationGrignard Reaction Retrosynthesis to Identify Carbonyl Precursor
  21. 21Principles Related to Practical Chemistry2.2%

    ~4 marks · ~1 paper in 2

    Confirmatory colour test for specific cationGroup-wise reagent-to-cation matchingFreundlich Isotherm Graph Calculation
  22. 22Some p-Block Elements2%

    ~4 marks · ~1 paper in 2

    True/False Statement Pair EvaluationGroup 13 Periodic Trends and AnomaliesSequential Reaction Product Identification
How to use this

This ranks chapters by marks — but it isn’t a study order. A high-weightage chapter often sits on top of two or three others, so working strictly top-down backfires. The reliable path is prerequisite order: build the chapters that unlock the rest, then bank the high-weightage ones once you’re ready for them.

See the Chemistry study plan in prerequisite order →

Weightage tells you where the marks are — not the order to learn them. Rhovecs sequences the chapters by what unlocks what, picks each next question, and schedules revision so the high-yield chapters actually stick.

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