Class 10 Science questions with answers

195 NCERT Class 10 Science questions with answers, chapter by chapter, from Chemical Reactions and Equations to Our Environment.

How to teach Class 10 Science · Class 10 Science common misconceptions

• Chapter 1: Chemical Reactions and Equations

  15 questions · Observable evidence that a chemical reaction has occurred · Balancing equations by conserving every kind of atom · Writing word, formula and complete chemical equations · Classifying reactions from changes in reactants and products · Combination reactions and exothermic energy release · Decomposition reactions driven by heat, light or electricity · Displacement reactions and relative reactivity · Double displacement, ion exchange and precipitation · Oxidation, reduction and paired redox change · Everyday oxidation: corrosion, rancidity and prevention

• Chapter 2: Acids, Bases and Salts

  15 questions · Indicators and laboratory identification of acids and bases · Using pH to compare acidic and basic solutions · Acids reacting with carbonates and hydrogencarbonates · Reactions of acids and bases with metals · Neutralisation and acidic or basic character of oxides · Ions as the basis of acidic, basic and conducting behaviour · Water, ion formation, dilution and safe handling · Importance of pH in living systems and everyday life · Salt families, parent acids and bases, and salt pH · Industrial and household chemicals obtained from common salt · Water of crystallisation, gypsum and Plaster of Paris

• Chapter 3: Metals and Non-metals

  15 questions · Physical properties of metals and non-metals · Metals and non-metals reacting with oxygen · Displacement reactions and the reactivity series · Reactions of metals with water and dilute acids · Electron transfer and formation of ionic compounds · Properties of ionic compounds · Extraction methods chosen from metal reactivity · Occurrence of metals, minerals, ores and enrichment · Electrolytic refining of metals · Corrosion and its prevention

• Chapter 4: Carbon and its Compounds

  15 questions · Covalent bonding and electron sharing · Tetravalency, catenation and carbon allotropes · Homologous series, functional groups and nomenclature · Hydrocarbon chains, rings and saturation · Properties and reactions of ethanol · Combustion and oxidation of carbon compounds · Addition, hydrogenation and substitution reactions · Ethanoic acid, esterification and acid reactions · Soap molecules, micelles and cleaning action · Soap in hard water and detergents

• Chapter 5: Life Processes

  15 questions · Photosynthesis and autotrophic nutrition · Translocation of food in plants · Human digestion and absorption · Cellular respiration and energy release · Human breathing and gas exchange · Blood components, capillaries and lymph · Heart, vessels and double circulation · Water and mineral transport in plants · Nephron structure and urine formation · Water balance, dialysis and excretion in plants

• Chapter 6: Control and Coordination

  15 questions · Neurons and transmission of nerve impulses · Adrenaline and rapid hormonal coordination · Central and peripheral nervous coordination · Reflex actions and reflex arcs · Regions of the human brain and their functions · Directional growth responses in plants · Plant hormones and non-directional movements · Endocrine glands and hormone targets · Thyroxine, iodine and feedback regulation · Insulin, growth hormone and sex hormones

• Chapter 7: How Do Organisms Reproduce?

  15 questions · DNA copying, reproduction and variation · Binary and multiple fission · Budding, fragmentation, regeneration and spores · Vegetative propagation in plants · Female reproductive system, fertilisation and implantation · Flower structure, pollination and fertilisation · Seed and fruit formation and germination · Male reproductive system and sperm production · Puberty and the menstrual cycle · Contraception and reproductive health

• Chapter 8: Heredity

  15 questions · Accumulation and inheritance of variation · Environmental selection and survival of variants · Dominance, recessiveness, genotype and phenotype · Mendel's monohybrid crosses · Dihybrid crosses and independent inheritance · Genes, alleles and inherited traits · How genes influence trait expression · Chromosome pairs, gametes and restoration at fertilisation · Diverse mechanisms of sex determination · Human XX–XY inheritance and probability

• Chapter 9: Light - Reflection and Refraction

  15 questions · Reflection laws and plane-mirror images · Principal rays for spherical mirrors · Spherical-mirror types and geometry · Concave-mirror image formation and uses · Convex-mirror images and field of view · Mirror sign convention, formula and magnification · Refraction laws and rectangular glass slab · Refractive index and optical speed · Spherical lenses, principal rays and images · Lens formula, magnification and power

• Chapter 10: The Human Eye and the Colourful World

  15 questions · Human-eye structure and retinal image · Accommodation, near point and far point · Hypermetropia and convex-lens correction · Myopia and concave-lens correction · Presbyopia and combined corrections · Dispersion of white light and recombination · Refraction and deviation through a prism · Atmospheric refraction, twinkling and planets · Advance sunrise and delayed sunset · Scattering, the Tyndall effect and sky colours

• Chapter 11: Electricity

  15 questions · Circuit diagrams, components and conventional direction · Electric current, charge and closed circuits · Potential difference, work and voltage measurement · Ohm's law and V-I graphs · Resistance, dimensions, material and resistivity · Resistors in series · Resistors in parallel · Heating appliances, materials and fuse safety · Heating effect and Joule's law · Electric power, energy and appliance ratings

• Chapter 12: Magnetic Effects of Electric Current

  15 questions · Magnetic fields and field-line representation · Magnetic field around a straight current-carrying conductor · Right-hand thumb rule · Magnetic field of a circular current loop · Solenoids and electromagnets · Fleming's left-hand rule and motor effect · Force on a current-carrying conductor · Electromagnetic induction and Fleming's right-hand rule · Domestic supply, parallel circuits and wire roles · Overloading, short circuits and protection

• Chapter 13: Our Environment

  15 questions · Ecosystems and their biotic and abiotic components · Producers, consumers and decomposers · Biological magnification in food chains · Food chains, arrows and trophic levels · Food webs and ecosystem balance · Energy transfer and the ten percent law · Formation and protective role of stratospheric ozone · Ozone depletion, CFCs and international response · Biodegradable and non-biodegradable waste · Waste segregation and environment-friendly management