Central Board of Secondary Education 2026 Slot 1 question paper with solutions
Every question from the Central Board of Secondary Education 2026 Slot 1 paper, 54 in total, with the official answer and a worked explanation for each. Open any question to read the solution, or sign in to attempt the paper against the clock.
Central Board of Secondary Education 2026 Slot 1 Biology (22)
- #025Translocation and Stomata MechanismCentral Board of Secondary EducationBIOTITAMedium
- #026Sex Determination in HumansCentral Board of Secondary EducationBIOTITAEasy
- #027Movement in Mimosa pudicaCentral Board of Secondary EducationBIOTITAMedium
- #028Ozone Layer Formation and CFCsCentral Board of Secondary EducationBIOTITAMedium
- #029DNA Stability in ReproductionCentral Board of Secondary EducationBIOTITAMedium
- #030Plant Fertilization and Human ReproductionCentral Board of Secondary EducationBIOTITAHard
- #040Stomach Protein Digesting EnzymeCentral Board of Secondary EducationBIOMCQEasy
- #041Functions of TranspirationCentral Board of Secondary EducationBIOMCQEasy
- #042Growth of Tendril in Pea PlantCentral Board of Secondary EducationBIOMCQMedium
- #043Hormone Regulating MetabolismCentral Board of Secondary EducationBIOMCQEasy
- #044Bacterial Sexually Transmitted DiseasesCentral Board of Secondary EducationBIOMCQMedium
- #045Mendelian Monohybrid Cross F2 ProgenyCentral Board of Secondary EducationBIOMCQEasy
- #046Steps of PhotosynthesisCentral Board of Secondary EducationBIOMCQEasy
- #047Assertion-Reason: Ventricle Wall ThicknessCentral Board of Secondary EducationBIOMCQMedium
- #048Assertion-Reason: Sex DeterminationCentral Board of Secondary EducationBIOMCQMedium
- #049Formation and Role of Ozone LayerCentral Board of Secondary EducationBIOTITAMedium
- #050Chromosome Number in Gametes and ZygoteCentral Board of Secondary EducationBIOTITAMedium
- #051Asexual Reproduction - Budding and RegenerationCentral Board of Secondary EducationBIOTITAMedium
- #052Breakdown Pathways of GlucoseCentral Board of Secondary EducationBIOTITAMedium
- #053Waste Disposal, Ecosystems, and BiomagnificationCentral Board of Secondary EducationBIOTITAMedium
- #054Case Study: Wheat Genome and GeneticsCentral Board of Secondary EducationBIOSET · 3QMedium
- #055Nervous System and Plant MovementsCentral Board of Secondary EducationBIOTITAHard
Central Board of Secondary Education 2026 Slot 1 Chemistry (18)
- #031Chemical Reactions of MnO2 and IronCentral Board of Secondary EducationCHEMTITAMedium
- #032Covalent Bonding of Carbon and Functional GroupsCentral Board of Secondary EducationCHEMTITAHard
- #033Acids, Bases, and pH IndicatorsCentral Board of Secondary EducationCHEMTITAMedium
- #034Corrosion of Metals and AlloysCentral Board of Secondary EducationCHEMTITAMedium
- #035Types of Chemical Reactions and EquationsCentral Board of Secondary EducationCHEMTITAHard
- #056Amphoteric Oxide Forming MetalCentral Board of Secondary EducationCHEMMCQEasy
- #057Heating Ferrous Sulphate CrystalsCentral Board of Secondary EducationCHEMMCQEasy
- #058Functional Group of ButanalCentral Board of Secondary EducationCHEMMCQEasy
- #059Exothermic Processes IdentificationCentral Board of Secondary EducationCHEMMCQEasy
- #060Structure of Soap MoleculeCentral Board of Secondary EducationCHEMMCQEasy
- #061Properties of AcidsCentral Board of Secondary EducationCHEMMCQEasy
- #062Property of CatenationCentral Board of Secondary EducationCHEMMCQEasy
- #063Assertion-Reason: Burning of Natural GasCentral Board of Secondary EducationCHEMMCQMedium
- #064Baking Soda and Fire Extinguisher ReactionCentral Board of Secondary EducationCHEMTITAMedium
- #065Ethanol Oxidation and EsterificationCentral Board of Secondary EducationCHEMTITAHard
- #066Slaking of Lime ReactionCentral Board of Secondary EducationCHEMTITAMedium
- #067Case Study: Salts, POP and Bleaching PowderCentral Board of Secondary EducationCHEMSET · 3QMedium
- #068Extraction and Refining of MetalsCentral Board of Secondary EducationCHEMTITAHard
Central Board of Secondary Education 2026 Slot 1 Physics (14)
- #036Scattering of Light and SpectrumCentral Board of Secondary EducationPHYTITAMedium
- #037Magnetic Effects of Electric CurrentCentral Board of Secondary EducationPHYTITAHard
- #038Vision Defects and Eye ControlCentral Board of Secondary EducationPHYTITAMedium
- #039Electrical Safety PrecautionsCentral Board of Secondary EducationPHYTITAEasy
- #069Light Reflection and Refraction StatementsCentral Board of Secondary EducationPHYMCQMedium
- #070Properties of SolenoidCentral Board of Secondary EducationPHYMCQEasy
- #071Assertion-Reason: Snell's Law and Angle of RefractionCentral Board of Secondary EducationPHYMCQMedium
- #072Circuit Total Resistance and Resistor CombinationsCentral Board of Secondary EducationPHYTITAMedium
- #073Magnetic Field of a Circular LoopCentral Board of Secondary EducationPHYTITAEasy
- #074Myopia Causes and CorrectionCentral Board of Secondary EducationPHYTITAMedium
- #075Atmospheric Refraction PhenomenaCentral Board of Secondary EducationPHYTITAMedium
- #076Electric Fuse and EarthingCentral Board of Secondary EducationPHYTITAMedium
- #077Case Study: Refraction, Prism, and Snell's LawCentral Board of Secondary EducationPHYSET · 3QMedium
- #078Electrical Power, Energy Consumption, and CostCentral Board of Secondary EducationPHYTITAHard