NEET 2019 against NEET 2021
What one sitting asked that the other did not — as a share of each paper, because NEET 2019 carries 158 questions and NEET 2021 carries 177. Comparing raw counts across papers of different sizes invents a trend in every row.
NEET 2025 vs NEET 2024NEET 2025 vs NEET 2023NEET 2025 vs NEET 2022NEET 2025 vs NEET 2021NEET 2025 vs NEET 2020NEET 2025 vs NEET 2019NEET 2024 vs NEET 2025NEET 2024 vs NEET 2023NEET 2024 vs NEET 2022NEET 2024 vs NEET 2021NEET 2024 vs NEET 2020NEET 2024 vs NEET 2019NEET 2023 vs NEET 2025NEET 2023 vs NEET 2024NEET 2023 vs NEET 2022NEET 2023 vs NEET 2021NEET 2023 vs NEET 2020NEET 2023 vs NEET 2019NEET 2022 vs NEET 2025NEET 2022 vs NEET 2024NEET 2022 vs NEET 2023NEET 2022 vs NEET 2021NEET 2022 vs NEET 2020NEET 2022 vs NEET 2019NEET 2021 vs NEET 2025NEET 2021 vs NEET 2024NEET 2021 vs NEET 2023NEET 2021 vs NEET 2022NEET 2021 vs NEET 2020NEET 2021 vs NEET 2019NEET 2020 vs NEET 2025NEET 2020 vs NEET 2024NEET 2020 vs NEET 2023NEET 2020 vs NEET 2022NEET 2020 vs NEET 2021NEET 2020 vs NEET 2019NEET 2019 vs NEET 2025NEET 2019 vs NEET 2024NEET 2019 vs NEET 2023NEET 2019 vs NEET 2022NEET 2019 vs NEET 2021NEET 2019 vs NEET 2020
Asked more in NEET 2019
- Principles of Inheritance and Variation+2.1 pp
3.8% (6) in NEET 2019 · 1.7% (3) in NEET 2021
- Microbes in Human Welfare+2.0 pp
2.5% (4) in NEET 2019 · 0.6% (1) in NEET 2021
- Chemical Coordination and Integration+1.9 pp
1.9% (3) in NEET 2019 · 0.0% (0) in NEET 2021
- Biodiversity and Conservation+1.9 pp
1.9% (3) in NEET 2019 · 0.0% (0) in NEET 2021
Asked more in NEET 2021
- Electrostatic Potential and Capacitance-2.8 pp
0.0% (0) in NEET 2019 · 2.8% (5) in NEET 2021
- Organisms and Populations-2.3 pp
0.0% (0) in NEET 2019 · 2.3% (4) in NEET 2021
- Biotechnology: Principles and Processes-2.1 pp
1.9% (3) in NEET 2019 · 4.0% (7) in NEET 2021
- Molecular Basis of Inheritance-1.9 pp
3.2% (5) in NEET 2019 · 5.1% (9) in NEET 2021
- Alternating Current-1.7 pp
0.0% (0) in NEET 2019 · 1.7% (3) in NEET 2021
- Cell Cycle and Cell Division-1.6 pp
1.3% (2) in NEET 2019 · 2.8% (5) in NEET 2021
Present on one paper and absent from the other
Absent from one sitting is not absent from the syllabus. A chapter carrying one question one year and none the next has told you almost nothing.
Only in NEET 2019
- Atoms · 1
- Chemical Coordination and Integration · 3
- Classification of Elements and Periodicity in Properties · 1
- Biodiversity and Conservation · 3
- Mechanical Properties of Solids · 1
- Wave Optics · 1
- Neural Control and Coordination · 1
- Magnetism and Matter · 1
Only in NEET 2021
- Alcohols, Phenols and Ethers · 1
- Electrostatic Potential and Capacitance · 5
- Haloalkanes and Haloarenes · 2
- Photosynthesis in Higher Plants · 2
- Organisms and Populations · 4
- Alternating Current · 3
Every chapter, both papers
| Chapter | NEET 2019 | NEET 2021 | Change |
|---|---|---|---|
| Molecular Basis of InheritanceBotany | 3.2% (5) | 5.1% (9) | -1.9 pp |
| Biotechnology: Principles and ProcessesZoology | 1.9% (3) | 4.0% (7) | -2.1 pp |
| Principles of Inheritance and VariationBotany | 3.8% (6) | 1.7% (3) | +2.1 pp |
| The p-Block ElementsChemistry | 3.2% (5) | 2.3% (4) | +0.9 pp |
| BiomoleculesZoology | 2.5% (4) | 2.8% (5) | -0.3 pp |
| Plant KingdomBotany | 1.9% (3) | 2.8% (5) | -0.9 pp |
| Sexual Reproduction in Flowering PlantsBotany | 2.5% (4) | 1.7% (3) | +0.8 pp |
| HydrocarbonsChemistry | 2.5% (4) | 1.7% (3) | +0.8 pp |
| Cell: The Unit of LifeBotany | 2.5% (4) | 1.7% (3) | +0.8 pp |
| Ray Optics and Optical InstrumentsPhysics | 1.9% (3) | 2.3% (4) | -0.4 pp |
| Cell Cycle and Cell DivisionBotany | 1.3% (2) | 2.8% (5) | -1.6 pp |
| EvolutionZoology | 2.5% (4) | 1.1% (2) | +1.4 pp |
| Reproductive HealthZoology | 1.9% (3) | 1.7% (3) | +0.2 pp |
| Human ReproductionZoology | 1.9% (3) | 1.7% (3) | +0.2 pp |
| Anatomy of Flowering PlantsBotany | 1.3% (2) | 2.3% (4) | -1.0 pp |
| Moving Charges and MagnetismPhysics | 1.3% (2) | 2.3% (4) | -1.0 pp |
| Biotechnology and its ApplicationsZoology | 1.3% (2) | 2.3% (4) | -1.0 pp |
| Current ElectricityPhysics | 1.3% (2) | 2.3% (4) | -1.0 pp |
| Animal KingdomZoology | 1.3% (2) | 2.3% (4) | -1.0 pp |
| Microbes in Human WelfareBotany | 2.5% (4) | 0.6% (1) | +2.0 pp |
| ThermodynamicsChemistry | 1.9% (3) | 1.1% (2) | +0.8 pp |
| Work, Energy and PowerPhysics | 1.9% (3) | 1.1% (2) | +0.8 pp |
| OscillationsPhysics | 1.9% (3) | 1.1% (2) | +0.8 pp |
| Human Health and DiseaseZoology | 1.9% (3) | 1.1% (2) | +0.8 pp |
| Structural Organisation in AnimalsZoology | 1.9% (3) | 1.1% (2) | +0.8 pp |
| Plant Growth and DevelopmentBotany | 1.3% (2) | 1.7% (3) | -0.4 pp |
| Semiconductor ElectronicsPhysics | 1.3% (2) | 1.7% (3) | -0.4 pp |
| EcosystemBotany | 1.3% (2) | 1.7% (3) | -0.4 pp |
| Breathing and Exchange of GasesZoology | 1.3% (2) | 1.7% (3) | -0.4 pp |
| Locomotion and MovementZoology | 1.3% (2) | 1.7% (3) | -0.4 pp |
| Electrostatic Potential and CapacitancePhysics | 0.0% (0) | 2.8% (5) | -2.8 pp |
| EquilibriumChemistry | 1.9% (3) | 0.6% (1) | +1.3 pp |
| Electric Charges and FieldsPhysics | 1.9% (3) | 0.6% (1) | +1.3 pp |
| Biological ClassificationBotany | 1.9% (3) | 0.6% (1) | +1.3 pp |
| Motion in a PlanePhysics | 1.3% (2) | 1.1% (2) | +0.1 pp |
| System of Particles and Rotational MotionPhysics | 1.3% (2) | 1.1% (2) | +0.1 pp |
| GravitationPhysics | 1.3% (2) | 1.1% (2) | +0.1 pp |
| Chemical KineticsChemistry | 1.3% (2) | 1.1% (2) | +0.1 pp |
| Body Fluids and CirculationZoology | 1.3% (2) | 1.1% (2) | +0.1 pp |
| ElectrochemistryChemistry | 1.3% (2) | 1.1% (2) | +0.1 pp |
| Structure of AtomChemistry | 1.3% (2) | 1.1% (2) | +0.1 pp |
| Electromagnetic WavesPhysics | 1.3% (2) | 1.1% (2) | +0.1 pp |
| SolutionsChemistry | 1.3% (2) | 1.1% (2) | +0.1 pp |
| Chemical Bonding and Molecular StructureChemistry | 1.3% (2) | 1.1% (2) | +0.1 pp |
| Units and MeasurementsPhysics | 0.6% (1) | 1.7% (3) | -1.1 pp |
| Aldehydes, Ketones and Carboxylic AcidsChemistry | 0.6% (1) | 1.7% (3) | -1.1 pp |
| NucleiPhysics | 0.6% (1) | 1.7% (3) | -1.1 pp |
| Organisms and PopulationsBotany | 0.0% (0) | 2.3% (4) | -2.3 pp |
| Chemical Coordination and IntegrationZoology | 1.9% (3) | 0.0% (0) | +1.9 pp |
| Biodiversity and ConservationBotany | 1.9% (3) | 0.0% (0) | +1.9 pp |
| Excretory Products and their EliminationZoology | 1.3% (2) | 0.6% (1) | +0.7 pp |
| Thermal Properties of MatterPhysics | 1.3% (2) | 0.6% (1) | +0.7 pp |
| Respiration in PlantsBotany | 1.3% (2) | 0.6% (1) | +0.7 pp |
| Mechanical Properties of FluidsPhysics | 1.3% (2) | 0.6% (1) | +0.7 pp |
| Laws of MotionPhysics | 1.3% (2) | 0.6% (1) | +0.7 pp |
| AminesChemistry | 0.6% (1) | 1.1% (2) | -0.5 pp |
| The d- and f-Block ElementsChemistry | 0.6% (1) | 1.1% (2) | -0.5 pp |
| Dual Nature of Radiation and MatterPhysics | 0.6% (1) | 1.1% (2) | -0.5 pp |
| Morphology of Flowering PlantsBotany | 0.6% (1) | 1.1% (2) | -0.5 pp |
| Coordination CompoundsChemistry | 0.6% (1) | 1.1% (2) | -0.5 pp |
| Organic Chemistry: Some Basic Principles and TechniquesChemistry | 0.6% (1) | 1.1% (2) | -0.5 pp |
| Alternating CurrentPhysics | 0.0% (0) | 1.7% (3) | -1.7 pp |
| Electromagnetic InductionPhysics | 0.6% (1) | 0.6% (1) | +0.1 pp |
| Motion in a Straight LinePhysics | 0.6% (1) | 0.6% (1) | +0.1 pp |
| Kinetic TheoryPhysics | 0.6% (1) | 0.6% (1) | +0.1 pp |
| Redox ReactionsChemistry | 0.6% (1) | 0.6% (1) | +0.1 pp |
| Some Basic Concepts of ChemistryChemistry | 0.6% (1) | 0.6% (1) | +0.1 pp |
| The Living WorldBotany | 0.6% (1) | 0.6% (1) | +0.1 pp |
| Haloalkanes and HaloarenesChemistry | 0.0% (0) | 1.1% (2) | -1.1 pp |
| Photosynthesis in Higher PlantsBotany | 0.0% (0) | 1.1% (2) | -1.1 pp |
| AtomsPhysics | 0.6% (1) | 0.0% (0) | +0.6 pp |
| Classification of Elements and Periodicity in PropertiesChemistry | 0.6% (1) | 0.0% (0) | +0.6 pp |
| Mechanical Properties of SolidsPhysics | 0.6% (1) | 0.0% (0) | +0.6 pp |
| Wave OpticsPhysics | 0.6% (1) | 0.0% (0) | +0.6 pp |
| Neural Control and CoordinationZoology | 0.6% (1) | 0.0% (0) | +0.6 pp |
| Magnetism and MatterPhysics | 0.6% (1) | 0.0% (0) | +0.6 pp |
| Alcohols, Phenols and EthersChemistry | 0.0% (0) | 0.6% (1) | -0.6 pp |
67 of 77 chapters moved by less than 1.5 percentage points and are greyed out — at these chapter sizes, a swing of one or two questions is noise, not a signal.
Two sittings are two sittings. Everything above describes what these two papers contained. None of it predicts the next one, and a chapter that fell here is not a chapter to drop — the examiners are not running a trend. The aggregate across every complete paper is the more reliable number.