CBSE Class 10 Science Syllabus 2025-26: Download PDF, Chapter-wise Topics & Marks

Unit-Wise CBSE 10th Class Science Syllabus 2025-26

Students who will appear for the CBSE board 10th exam can check out the following unit-wise syllabus for the science subject. The unit-wise syllabus will help students to prepare for the board examination. Candidates can check out the detailed CBSE 10th syllabus for the science subject below.

Unit I: Chemical Substances - Nature and Behaviour

• Chemical Reactions and Equations: Chemical reactions, Chemical equation, Balanced chemical equation, types of chemical reactions: combination, decomposition, displacement, double displacement, precipitation, endothermic, exothermic reactions, oxidation and reduction.

• Acids, Bases and Salts: Acids and Bases – definitions in terms of furnishing of H+ and OH– ions, identification using indicators, chemical properties, examples and uses, neutralization, concept of pH scale (Definition relating to logarithm not required), importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris.

• Metals and Non-metals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds; Basic metallurgical processes; Corrosion and its prevention.

• Carbon and its Compounds: Covalent bonds – formation and properties of covalent compounds, Versatile nature of carbon, Hydrocarbons – saturated and unsaturated, Homologous series. Nomenclature of alkanes, alkenes, alkynes and carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes). Chemical properties of carbon compounds (combustion, oxidation, addition and substitution reactions). Ethanol and Ethanoic acid (only properties and uses), soaps and detergents.

Unit II: World of Living

• Life processes: ‘Living Being’. Basic concept of nutrition, respiration, transport and excretion in plants and animals.

• Control and co-ordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and co-ordination in animals: Nervous system; Voluntary, involuntary and reflex action; Chemical co-ordination: animal hormones.

• Reproduction: Reproduction in animals and plants (asexual and sexual), reproductive health, needs, and methods of family planning. Safe sex vs HIV/AIDS. Childbearing and women’s health.

• Heredity and Evolution: Heredity; Mendel’s contribution- Laws for inheritance of traits: Sex determination; brief introduction.

Unit III: Natural Phenomena

• Reflection of light by curved surfaces: Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification.

• Refraction: Laws of refraction, refractive index.

• Refraction of light by spherical lens: Image formed by spherical lenses; Lens formula (Derivation not required); Magnification. Power of a lens.

• Functioning of a lens in the human eye, defects of vision and their corrections, applications of spherical mirrors and lenses.

• Refraction of light through a prism, dispersion of light, scattering of light, and applications in daily life (excluding the colour of the sun at sunrise and sunset).

Unit IV: Effects of Current

• Electric current, potential difference and electric current. Ohm’s law; Resistance, Resistivity, Factors on which the resistance of a conductor depends. Series combination of resistors, parallel combination of resistors and their applications in daily life. The heating effect of electric current and its applications in daily life. Electric power, Interrelation between P, V, I and R.

• Magnetic effects of current: Magnetic field, field lines, field due to a current-carrying conductor, field due to a current-carrying coil or solenoid; Force on current-carrying conductor, Fleming’s Left Hand Rule, Direct current. Alternating current: frequency of AC. Advantages of AC over DC. Domestic electric circuits.

Unit V: Natural Resources

• Our environment: Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances.

How Can I Download the CBSE Class 10 Science Syllabus 2025-26 Online?

Students can check out the steps below to learn more about how to download the CBSE 10th syllabus for the science syllabus in online mode.

• Step 1: Visit the official website at cbse.gov.in.
  Step 2: Click on the “Academic Website” on the homepage.

• Step 3: Click on the “Curriculum” from the list of options mentioned in the menu bar.

• Step 4: Select the “Curriculum 2025-26” from the dropdown menu.

• Step 5: Click on the “Secondary Curriculum” link for the Class 10 syllabus.

• Step 6: Click on the “Academic Subjects” and press the “Science” link to download the science syllabus PDF.

• Step 7: Download the CBSE 10th Science syllabus for 2025-26 for future reference.

CBSE Class 10 Science 2025-26 Syllabus: Marks Distribution