CBSE Class 10 Science
For CBSE Class 10 Science, a focused approach on key concepts and recurring questions is essential for scoring well . Here are some of the most important questions and topics from each chapter, based on past board exams and expert recommendations:
Chemistry
- Chapter 1: Chemical Reactions and Equations
- Questions: Balancing chemical equations, identifying the types of reactions (decomposition, combination, displacement, double displacement, redox), and questions based on activities (color changes, observations).
- Important topics: Types of reactions with examples, rancidity, and corrosion.
- Chapter 2: Acids, Bases and Salts
- Questions: Indicator and pH scale related questions, properties of acids and bases, and the preparation/uses of common compounds.
- Important topics: pH scale, the Chlor-alkali process, Plaster of Paris (POP), and washing soda.
- Chapter 3: Metals and Non-metals
- Questions: Differentiating between metals and non-metals based on chemical and physical properties, explaining the reactivity series, and outlining the process of electrolytic refining.
- Important topics: Chemical properties of metals, reactivity series (give reasons type questions), and metallurgy concepts like calcination and roasting.
- Chapter 4: Carbon and Its Compounds
- Questions: Drawing electron dot structures, naming compounds using IUPAC nomenclature, and understanding homologous series.
- Important topics: Covalent bonding, IUPAC naming, homologous series, and the properties of ethanol and ethanoic acid.
Biology
- Chapter 5: Life Processes
- Questions: Diagram-based questions (human heart, nephron, digestive system, stomata), and explaining the mechanisms of photosynthesis, respiration, transport, and excretion.
- Important topics: Basic concepts of nutrition, respiration (aerobic vs. anaerobic with equations), transport in humans and plants, and the structure/functioning of the human heart.
- Chapter 6: Control and Coordination
- Questions: Questions on hormones, reflex action, and the structure/functions of different parts of the brain.
- Important topics: Tropic movements in plants, animal hormones and their functions, and the human nervous system.
- Chapter 7: How Do Organisms Reproduce?
- Questions: Asexual and sexual reproduction methods in plants and animals (especially diagrams of binary fission, budding, etc.), and questions about reproductive health.
- Important topics: Modes of reproduction and reproductive systems in humans.
- Chapter 8: Heredity
- Questions: Explaining Mendel’s laws of inheritance using crosses (monohybrid and dihybrid), and questions about sex determination in humans.
- Important topics: Mendel’s contributions (laws of dominance, segregation, independent assortment), and sex determination flowcharts.
Physics
- Chapter 9: Light – Reflection and Refraction
- Questions: Numericals based on mirror and lens formulas, ray diagrams for image formation, and concepts of power of a lens.
- Important topics: Reflection by curved surfaces, refraction, functioning of lenses, and sign conventions.
- Chapter 10: The Human Eye and the Colourful World
- Questions: Explaining eye defects (myopia and hypermetropia) and their correction, and reasoning-based questions on atmospheric refraction (twinkling of stars, color of the sky).
- Important topics: Structure of the human eye, defects of vision, and scattering of light.
- Chapter 11: Electricity
- Questions: Numerical problems involving Ohm’s law, resistance in series and parallel circuits, and Joule’s law of heating.
- Important topics: Electric current and circuit, Ohm’s law, resistance, and electric power.
- Chapter 12: Magnetic Effects of Electric Current
- Questions: Drawing magnetic field lines, explaining the working principle of an electric motor or generator, and applying Fleming’s rules.
- Important topics: Magnetic field lines, field due to current-carrying conductors/solenoids, electric motors, and electromagnetic induction.
Environmental Science
- Chapter 13: Our Environment
- Questions: Explaining the flow of energy in a food chain/web, and the causes/effects of ozone depletion and waste management problems.
- Important topics: Eco-systems (trophic levels, food chains), ozone depletion, and waste disposal methods.