ISC Science Exam Pattern 2026: Know Marking Scheme & Exam Duration

Indian School Certificate 2026 ( ISC )

This exam is conducted for courses given below:
Jasleen Taneja
Updated on Jun 20, 2024 14:58 IST

By Jasleen Taneja

ISC 2025 Science Exam Pattern mentions the duration of the exam, marking scheme, types of questions asked in the exam, and more. Students must know the exam pattern thoroughly to attempt the paper effectively and in less time. This year, the council has introduced changes in the ISC Science exam pattern 2025. The ISC exams 2025 are expected to be held in February/March 2025.

Table of content
  • ISC Exam Pattern 2025 for Science Subjects
  • FAQs on ISC Science Exam Pattern 2025
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ISC Exam Pattern 2025 for Science Subjects

Subject Particulars Marks
Physics Theory 70
Practical 15
Project Work 10
Practical File 5
Chemistry Theory 70
Practical 15
Project Work 10
Practical File 5
Biology Theory 70
Practical 15
Project Work 10
Practical File 5

ISC Exam Pattern 2025 Chemistry

Chemistry will also include two papers: theory and practical. Theory paper will be of 70 marks and practical paper will be of 30 marks.

Theory

Theory paper will include mainly 3 units and each will comprise different marks.

Unit- 1 (25 marks) will include the following topics.

  • Solid state
  • Solutions
  • Electrochemistry
  • Chemical kinetics
  • Surface chemistry

Unit-2 (20 marks) will include the following topics.

  • General Principles and Processes of Isolation of Elements
  • p -Block Elements
  • d -and f -Block Elements
  • Coordination Compounds

Unit-3 (25 marks) will include the following topics.

  • Haloalkanes and Haloarenes
  • Alcohols, Phenols and Ethers
  • Aldehydes, Ketones and Carboxylic Acids
  • Organic Compounds containing Nitrogen
  • Chemistry in Everyday Life

Project work

Students will have to make a project and assessment, which will be examined by a visitor examiner and teacher. Then, it will be approved by the council. 

ISC Exam Pattern 2025 Physics

Physics will also have two papers: theory and practical. Theory will be 70 marks and practical will be 20 marks.

Theory

Theory paper will carry 70 marks and the following topics will be asked in the paper.

  • Electronic
  • Current electricity
  • Magnetic Effects of Current and Magnetism
  • Electromagnetic Induction and AlternatingCurrents
  • Electromagnetic Waves
  • Dual Nature of Radiation and Matter
  • Atoms and Nuclei
  • Electronic Devices

Project work

Students have to prepare a project and practice on a topic given by the teacher. It will be examined by a teacher and a visitor examiner, then, it will be approved by the council. 

ISC Exam Pattern 2025 Biology

Biology will also have two papers: theory and practical. Theory will be of 70 marks and practical will be of 30 marks.

Theory

Theory paper will consist of 70 marks and students have no choice; they have to answer all the questions. Following topics will be included in the Theory exam.

Reproduction- 16 marks

Genetics and Evolution- 15 marks

Biology and Human Welfare- 14 marks

Biotechnology and its Applications- 10 marks

Ecology and Environment- 15 marks

Project work

Students have to prepare a project and practice on a topic given by the teacher. It will be examined by a teacher and a visitor examiner, then, it will be approved by the council. 

 

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FAQs on ISC Science Exam Pattern 2025

Students can check the FAQs on ISC exam pattern 2025 for Science subjects below:

Explore subject-wise topics asked in ISC

Select your preferred subject

Complement of a SetEqual SetsUniversal SetFinite and Infinite SetEmpty SetSets and their RepresentationsRelations and FunctionsCartesian Products of SetsFunctionsRelationsBinomial TheoremBinomial Theorem for Positive Integral IndexComposition of Functions and Invertible FunctionTypes of FunctionsTypes of RelationsProperties of Inverse Trigonometric FunctionsInverse Trigonometric FunctionsBasic Concepts of Inverse Trigonometric FunctionsTypes of MatrixTranspose of a MatrixSymmetric and Skew Symmetric MatricesInvertible MatricesOperations on MatricesDeterminantsDeterminantsIntegration as Inverse Process of DifferentiationDifferentiationStandard DeviationAssumed Mean MethodCorrelation and RegressionZ Score TableCube and CuboidComplement of a SetEqual SetsUniversal SetFinite and Infinite SetEmpty SetSets and their RepresentationsRelations and FunctionsCartesian Products of SetsFunctionsRelationsBinomial TheoremBinomial Theorem for Positive Integral IndexComposition of Functions and Invertible FunctionTypes of FunctionsTypes of RelationsProperties of Inverse Trigonometric FunctionsInverse Trigonometric FunctionsBasic Concepts of Inverse Trigonometric FunctionsTypes of MatrixTranspose of a MatrixSymmetric and Skew Symmetric MatricesInvertible MatricesOperations on MatricesDeterminantsDeterminantsIntegration as Inverse Process of DifferentiationDifferentiationStandard DeviationAssumed Mean MethodCorrelation and RegressionZ Score TableCube and CuboidOverviewDIMENSIONS OF PHYSICAL QUANTITIESDIMENSIONAL FORMULAESignificant FiguresDIMENSIONAL ANALYSIS AND ITS APPLICATIONSINTERNATIONAL SYSTEM OF UNITSOverviewChange of StateIdeal Gas Equation and Absolute TemperatureThermal ExpansionHeat TransferSpecific HeatCalorimetryTemperature and HeatMeasurement of TemperatureThermodynamic ProcessCarnot EngineReversible and Irreversible ProcessThermal EquilibriumThermodynamic State Variables Equation of StateOverviewFirst Law of ThermodynamicsSecond Law of ThermodynamicsBehaviour of GasesKinetic Theory of Ideal GasOverviewPeriodic and Oscillatory MotionSimple PendulumSimple Harmonic MotionOverviewSpeed of a Travelling WaveDisplacement Relation in a Progressive WaveSuperposition PrincipleBeatsReflection of WavesKinematic Equation Uniformly of Accelerated MotionInstantaneous Velocity and SpeedOverviewAccelerationResolution of VectorsVector Addition by Analytical MethodScalars and VectorsMultiplication of Vectors by Real NumbersAddition and Subtraction of VectorsOverviewProjectile MotionMotion in a PlaneConservation of MomentumEquilibrium of a ParticleCircular MotionCommon Forces in MechanicsSolving Problems in MechanicsConservation of Mechanical EnergyPotential Energy of SpringPowerKinetic EnergyCollisionWorkConcept of Potential EnergyMoment of InertiaOverviewCentre of MassVector Product of Two VectorsTorque and Angular MomentumMotion of Centre of MassEquilibrium of a Rigid BodyOverviewAngular Velocity and Relation with Linear VelocityDynamics of Rotational Motion About a Fixed AxisKinematics of Rotational Motion About a Fixed AxisAngular Momentum of Rotation About a Fixed AxisKeplers LawOverviewEscape SpeedEarth SatellitesEnergy of an Orbiting SatelliteStress Strain CurveElastic ModuliApplications of Elastic Behaviour of MaterialsSurface TensionBernoulli PrinciplePressure in FluidsViscosityStreamline FlowForces between Multiple ChargesConductors and InsulatorsBasic Properties of Electric ChargeElectric ChargeElectric Charge and FieldElectric FluxElectric Charge and FieldElectric Field LinesContinuous Charge DistributionInterference Light Waves Youngs ExperimentRefraction Reflection Plane Wave Huygens PrincipleRefraction Reflection Plane Wave Huygens PrincipleEinstein Photoelectric TheoryPhotoelectric Effect Wave Theory LightPhotoelectric EffectElectron EmissionOverviewBohr Model of Hydrogen AtomRadioactivityPhysics Nuclei OverviewSize of NucleusBinding EnergyNuclear EnergySemiconductor Devices OverviewSemiconductor Devices OverviewSemiconductor DiodeDiode as RectifierIntrinsic SemiconductorExtrinsic SemiconductorOverviewPotential Due to Point ChargeCombination of CapacitorsElectrostatic PotentialEnergy Stored in a CapacitorCapacitors and CapacitanceEffect of Dielectric on CapacitanceElectrostatics of ConductorsPotential Energy of a System of ChargesPotential due to a System of ChargesElectric CurrentOverviewElectrical Energy and PowerTemperature Dependence of ResistivityWheatstone BridgeOverviewOhms LawKirchhoffs LawDrift of Electrons and the Origin of ResistivityTorque on Current Loop Magnetic DipoleMotion in Magnetic FieldSolenoidMagnetic Field due to a Current ElementMagnetic Field on Axis of Circular Current LoopAmpere Circuital LawMagnetic ForceOverviewMoving Coil GalvanometerMagnetism and MatterMagnetic Properties of MaterialsMagnetisation and Magnetic IntensityBar MagnetElectromagnetismMotional Electromotive ForceExperiments of Faraday and HenryAlternating Current OverviewTransformerAC Voltage Applied to a ResistorAC Voltage Applied to an InductorAC Voltage applied to a CapacitorAC Voltage applied to a Series LCR circuitRepresentation of AC Current and Voltage by VectorElectromagnetic SpectrumElectromagnetic WavesDisplacement CurrentTotal Internal ReflectionRefraction through a PrismOptical InstrumentsDerivation of Lens FormulaReflection of Light by Spherical MirrorsRefraction at Spherical Surface and by LensesDerive Equation of Motion by Calculus methodAlternating Current OverviewMole Concept and Molar MassSTOICHIOMETRY AND STOICHIOMETRIC CALCULATIONSPercentage CompositionLaws of Chemical CombinationAtomic and Molecular MassesProperties of Matter and their MeasurementImportance of ChemistryOverviewOverviewAtomic ModelsDiscovery of Sub Atomic ParticlesTowards Quantum Mechanical Model of AtomQuantum Mechanical Model of AtomElectronic Configuration Types of ElementsPeriodic Table Electronic Configuration of ElementPeriodic Trends in Properties of ElementsGenesis of Periodic ClassificationNomenclature of Elements with Atomic NumbersPresent Form of Periodic TableChemical Bonding and Molecular StructureHybridizationValence Bond TheoryMolecular Orbital TheoryHydrogen BondingIonic or Electrovalent BondKossel-Lewis Approach to Chemical BondingBond ParametersBonding in Homonuclear Diatomic MoleculesVSEPR TheoryApplications of Chemical BondingEquilibrium ProcessesHomogeneous EquilibriaFactors Affecting EquilibriaApplications of Equilibrium ConstantIonization of Acids and BasesIonic Equilibrium in SolutionEquilibrium in Chemical ProcessesSolubility Equilibria of Sparingly Soluble SaltsHeter Heterogeneous EquilibriaOxidation NumberClassification of Organic CompoundsIsomerismNomenclature of Organic CompoundsQuantitative AnalysisQualitative Analysis of Organic CompoundsOverviewStructural Representations of Organic CompoundsFundamental Concepts in Organic Reaction MechanismTetravalence of Carbon Shapes of Organic CompoundsMethods of Purification of Organic CompoundsClassificationAlkanesAlkenesAlkynesAromatic HydrocarbonCarcinogenicity and ToxicityAbnormal Molar MassColligative Properties and Molar MassSolubilityProteinsVitaminsCarbohydratesEnzymesHormonesNucleic AcidsElectrolytic Cells and ElectrolysisCorrosionGalvanic CellFuel CellsNernst EquationElectrochemical CellsBatteriesRate of ReactionIntegrated Rate EquationsCollision Theory of Chemical ReactionsTemperature Dependence of the Rate of a ReactionFactors Influencing Rate of a ReactionBonding in Metal CarbonylsDifference between Glucose and Fructose

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