Chemistry · JEE Main

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

Computed from every question in 118 JEE Main papers (2020–2025) — 2590 questions mapped to chapters. Not a guess; the actual distribution.

118 papers analysed2590 questions mapped2020–2025
#ChapterWeightagePer paperMost common question types
1Organic Chemistry - Some Basic Principles and TechniquesOrganic Chemistry9%~1.97 Q · ~7.9 marksCarbocation Stability OrderingCarius Method Halogen Percentage CalculationIdentifying most/least acidic or basic compound in a set
2Coordination CompoundsInorganic Chemistry7.6%~1.67 Q · ~6.7 marksSpin-only magnetic moment calculationCFSE calculation from d-orbital occupancyHigh-spin vs low-spin configuration identification
3Chemical Bonding and Molecular StructureInorganic Chemistry6.6%~1.44 Q · ~5.8 marksCount lone pairs to determine geometryClassify multiple species by geometry typeBond Order Calculation and Comparison
4SolutionsPhysical Chemistry6.3%~1.39 Q · ~5.6 marksDirect colligative formula applicationDirect Molarity Calculation from Mass/VolumeInterconversion of Molarity, Molality, and Density
5d- and f-Block ElementsInorganic Chemistry6.2%~1.36 Q · ~5.4 marksOxidation states and variable valency trendsSpin-only magnetic moment calculationStability of Non-Trivalent Oxidation States
6EquilibriumPhysical Chemistry5.2%~1.14 Q · ~4.6 marksICE Table with Given Extent or PercentageKsp from molar solubility formulaDirect pH/pOH from Strong Electrolyte
7Chemical ThermodynamicsPhysical Chemistry5.1%~1.12 Q · ~4.5 marksHess's Law algebraic combination of reactionsΔH–ΔU interconversion via Δng RTDirect ΔG = ΔH − TΔS Calculation
8Some Basic Concepts in ChemistryPhysical Chemistry5.1%~1.13 Q · ~4.5 marksMole-to-mole stoichiometry from balanced equationLimiting reagent identification and yield calculationAcid-base neutralisation equivalence calculation
9Atomic StructurePhysical Chemistry4.7%~1.04 Q · ~4.2 marksBohr Model Orbital Property DerivationPhoton Energy and Photon Count from PowerRadial/Angular Node Counting
10p-Block ElementsInorganic Chemistry4.7%~1.03 Q · ~4.1 marksReaction products and redox of p-block compoundsAssertion–Reason or statement correctness evaluationCounting bonds in oxoacid structures
11Classification of Elements and Periodicity in PropertiesInorganic Chemistry4.6%~1 Q · ~4 marksIsoelectronic species size orderingAcid-base nature of oxides and hydroxidesElectron gain enthalpy anomalies in small atoms
12Chemical KineticsPhysical Chemistry4.2%~0.92 Q · ~3.7 marksHalf-life relationship to completion timeDirect k calculation from concentration-time dataOrder Determination by Initial Rates Method
13BiomoleculesOrganic Chemistry4.1%~0.9 Q · ~3.6 marksStructural properties of specific monosaccharidesProtein structure level identificationCounting structural features in biomolecule structures
14ElectrochemistryPhysical Chemistry4.1%~0.9 Q · ~3.6 marksFaraday's Law mass/mole calculationBattery and electrolytic cell product identificationRanking oxidising/reducing agents by E° values
15HydrocarbonsOrganic Chemistry3.9%~0.85 Q · ~3.4 marksAromaticity and resonance stabilisation reasoningNamed Reaction Product Identification on AlkenesDirecting effects and meta vs ortho/para classification
16Aldehydes Ketones and Carboxylic AcidsOrganic Chemistry3.7%~0.82 Q · ~3.3 marksIodoform and Cannizzaro Reaction EligibilityTollen's / Fehling's Test ApplicabilityAldol Condensation Mechanism and Cross-Aldol Analysis
17Redox ReactionsPhysical Chemistry3.3%~0.73 Q · ~2.9 marksIdentify oxidising/reducing agent by OS changeDisproportionation via intermediate OSAssign OS using algebraic equation
18Organic Compounds Containing NitrogenOrganic Chemistry3.1%~0.68 Q · ~2.7 marksIdentification tests and reagent rolesRanking basicity by lone pair availabilityHydrolysis of Diazonium Salt to Phenol
19Organic Compounds Containing HalogensOrganic Chemistry2.2%~0.48 Q · ~1.9 marksSN1 vs SN2 Condition-Based ReasoningMulti-Step Reaction Sequence Product TracingAssertion-Reason on Halide Reactivity
20Some p-Block ElementsInorganic Chemistry2.2%~0.49 Q · ~2 marksTrue/False Statement Pair EvaluationGroup 13 Periodic Trends and AnomaliesSequential Reaction Product Identification
21Alcohols Phenols and EthersOrganic Chemistry2.1%~0.46 Q · ~1.8 marksQualitative Chemical Test Identification and MatchingMulti-Step Sequence Identification via Intermediate CharacterisationAssertion-Reason Evaluation of Alcohol/Phenol Properties
22Principles Related to Practical ChemistryPractical Chemistry2.1%~0.46 Q · ~1.8 marksConfirmatory colour test for specific cationGroup-wise reagent-to-cation matchingColour identification of precipitates or salts
  1. 1Organic Chemistry - Some Basic Principles and Techniques9%

    ~1.97 Q · ~7.9 marks per paper

    Carbocation Stability OrderingCarius Method Halogen Percentage CalculationIdentifying most/least acidic or basic compound in a set
  2. 2Coordination Compounds7.6%

    ~1.67 Q · ~6.7 marks per paper

    Spin-only magnetic moment calculationCFSE calculation from d-orbital occupancyHigh-spin vs low-spin configuration identification
  3. 3Chemical Bonding and Molecular Structure6.6%

    ~1.44 Q · ~5.8 marks per paper

    Count lone pairs to determine geometryClassify multiple species by geometry typeBond Order Calculation and Comparison
  4. 4Solutions6.3%

    ~1.39 Q · ~5.6 marks per paper

    Direct colligative formula applicationDirect Molarity Calculation from Mass/VolumeInterconversion of Molarity, Molality, and Density
  5. 5d- and f-Block Elements6.2%

    ~1.36 Q · ~5.4 marks per paper

    Oxidation states and variable valency trendsSpin-only magnetic moment calculationStability of Non-Trivalent Oxidation States
  6. 6Equilibrium5.2%

    ~1.14 Q · ~4.6 marks per paper

    ICE Table with Given Extent or PercentageKsp from molar solubility formulaDirect pH/pOH from Strong Electrolyte
  7. 7Chemical Thermodynamics5.1%

    ~1.12 Q · ~4.5 marks per paper

    Hess's Law algebraic combination of reactionsΔH–ΔU interconversion via Δng RTDirect ΔG = ΔH − TΔS Calculation
  8. 8Some Basic Concepts in Chemistry5.1%

    ~1.13 Q · ~4.5 marks per paper

    Mole-to-mole stoichiometry from balanced equationLimiting reagent identification and yield calculationAcid-base neutralisation equivalence calculation
  9. 9Atomic Structure4.7%

    ~1.04 Q · ~4.2 marks per paper

    Bohr Model Orbital Property DerivationPhoton Energy and Photon Count from PowerRadial/Angular Node Counting
  10. 10p-Block Elements4.7%

    ~1.03 Q · ~4.1 marks per paper

    Reaction products and redox of p-block compoundsAssertion–Reason or statement correctness evaluationCounting bonds in oxoacid structures
  11. 11Classification of Elements and Periodicity in Properties4.6%

    ~1 Q · ~4 marks per paper

    Isoelectronic species size orderingAcid-base nature of oxides and hydroxidesElectron gain enthalpy anomalies in small atoms
  12. 12Chemical Kinetics4.2%

    ~0.92 Q · ~3.7 marks per paper

    Half-life relationship to completion timeDirect k calculation from concentration-time dataOrder Determination by Initial Rates Method
  13. 13Biomolecules4.1%

    ~0.9 Q · ~3.6 marks per paper

    Structural properties of specific monosaccharidesProtein structure level identificationCounting structural features in biomolecule structures
  14. 14Electrochemistry4.1%

    ~0.9 Q · ~3.6 marks per paper

    Faraday's Law mass/mole calculationBattery and electrolytic cell product identificationRanking oxidising/reducing agents by E° values
  15. 15Hydrocarbons3.9%

    ~0.85 Q · ~3.4 marks per paper

    Aromaticity and resonance stabilisation reasoningNamed Reaction Product Identification on AlkenesDirecting effects and meta vs ortho/para classification
  16. 16Aldehydes Ketones and Carboxylic Acids3.7%

    ~0.82 Q · ~3.3 marks per paper

    Iodoform and Cannizzaro Reaction EligibilityTollen's / Fehling's Test ApplicabilityAldol Condensation Mechanism and Cross-Aldol Analysis
  17. 17Redox Reactions3.3%

    ~0.73 Q · ~2.9 marks per paper

    Identify oxidising/reducing agent by OS changeDisproportionation via intermediate OSAssign OS using algebraic equation
  18. 18Organic Compounds Containing Nitrogen3.1%

    ~0.68 Q · ~2.7 marks per paper

    Identification tests and reagent rolesRanking basicity by lone pair availabilityHydrolysis of Diazonium Salt to Phenol
  19. 19Organic Compounds Containing Halogens2.2%

    ~0.48 Q · ~1.9 marks per paper

    SN1 vs SN2 Condition-Based ReasoningMulti-Step Reaction Sequence Product TracingAssertion-Reason on Halide Reactivity
  20. 20Some p-Block Elements2.2%

    ~0.49 Q · ~2 marks per paper

    True/False Statement Pair EvaluationGroup 13 Periodic Trends and AnomaliesSequential Reaction Product Identification
  21. 21Alcohols Phenols and Ethers2.1%

    ~0.46 Q · ~1.8 marks per paper

    Qualitative Chemical Test Identification and MatchingMulti-Step Sequence Identification via Intermediate CharacterisationAssertion-Reason Evaluation of Alcohol/Phenol Properties
  22. 22Principles Related to Practical Chemistry2.1%

    ~0.46 Q · ~1.8 marks per paper

    Confirmatory colour test for specific cationGroup-wise reagent-to-cation matchingColour identification of precipitates or salts
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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