science test class 10 science test class 10 0% Time Limit 10 minutes Maximum Allowed Time Is over Your Paper Successfully Sent. school1 Class 10 Science 1 1 / 80 When an acid reacts with a base, the products are typically: Salt and gas Acid and base Salt and water 2 / 80 Which factor does NOT affect gravitational force? Distance between the objects Mass of the objects Color of the objects 3 / 80 What is the pH of a basic solution? Equal to 7. Less than 7. Greater than 7. 4 / 80 How does the value of 'g' change with depth? It decreases It remains the same It increases 5 / 80 What does a balanced chemical equation show? More atoms on the reactant side. More atoms on the product side. Equal number of atoms of each element on both sides. 6 / 80 What happens in an exothermic reaction? Heat is absorbed. No heat change. Heat is released. 7 / 80 What are the elements in Group 17 called? Noble gases Halogens Alkali metals 8 / 80 What is a decomposition reaction? A single substance breaks down into two or more substances. Two substances exchange ions. Two substances combine to form a single product. 9 / 80 What type of reaction involves the breaking down of a compound into two or more substances? Decomposition Combustion Synthesis 10 / 80 What is the common characteristic of elements in the same period? Same chemical reactivity Same atomic number Same number of electron shells 11 / 80 What is the term for the movement of particles from high concentration to low concentration? Diffusion Osmosis Active transport 12 / 80 What is the full form of DNA? Deoxynitrogen acid Deoxyribose nucleic acid Deoxyribonucleic acid 13 / 80 What is the basic unit of heredity? Chromosome DNA Gene 14 / 80 Which vitamin helps in blood clotting? Vitamin D Vitamin K Vitamin C 15 / 80 Which blood group is known as the universal donor? A AB O 16 / 80 What is the term for the amount of matter in an object? Weight Volume Mass 17 / 80 What is the name of the process in which water changes directly into vapor without becoming a liquid? Sublimation Condensation Freezing 18 / 80 Which planet is known as the "Red Planet"? Venus Mars Mercury 19 / 80 What is the main function of red blood cells? Transport nutrients Fight infections Transport oxygen 20 / 80 What is the term for the splitting of light into its constituent colors? Dispersion Reflection Refraction 21 / 80 Which process is used for separating components of a mixture based on boiling points? Decantation Filtration Distillation 22 / 80 What is the boiling point of ethanol? 78.5°C 100°C 78°C 23 / 80 What is the formula for calculating speed? Distance² ÷ Time Distance × Time Distance ÷ Time 24 / 80 What is the term for the force per unit area applied on a surface? Density Volume Pressure 25 / 80 Which vitamin is also known as ascorbic acid? Vitamin B Vitamin D Vitamin C 26 / 80 What is the effect of rusting on the weight of iron? No change Increases Decreases 27 / 80 What is the name of the process used to separate different pigments from a mixture? Distillation Chromatography Filtration 28 / 80 What type of lens is used to correct myopia? Concave Cylindrical Convex 29 / 80 What is the term for the splitting of a nucleus into two smaller nuclei, releasing energy? Nuclear fusion Radioactivity Nuclear fission 30 / 80 What is the function of the pancreas in the human body? Produces insulin Produces hormones Produces bile 31 / 80 What is the chemical formula of quicklime? Ca(OH)₂ CaCO₃ CaO 32 / 80 What is the speed of light in a vacuum? 1.5 × 10⁸ m/s 2 × 10⁸ m/s 3 × 10⁸ m/s 33 / 80 Which gas is responsible for the greenhouse effect? Nitrogen Argon Carbon dioxide 34 / 80 What is the phenomenon responsible for the blue color of the sky? Reflection Refraction Scattering of light 35 / 80 Which organelle is known as the powerhouse of the cell? Mitochondria Ribosome Nucleus 36 / 80 What is the function of xylem in plants? Transport of oxygen Transport of water Transport of food 37 / 80 Which acid is present in lemon? Lactic acid Acetic acid Citric acid 38 / 80 What is the process of breaking down glucose to release energy called? Digestion Photosynthesis Respiration 39 / 80 What is the chemical formula of baking soda? NaCl NaHCO₃ Na₂CO₃ 40 / 80 Which organ in the human body stores bile? Liver Gallbladder Pancreas 41 / 80 What is the natural satellite of Earth? Mars Sun Moon 42 / 80 What is the product formed when magnesium reacts with oxygen? Magnesium oxide Magnesium chloride Magnesium carbonate 43 / 80 Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid? Oxygen Carbon dioxide Hydrogen 44 / 80 What is the main constituent of biogas? Carbon dioxide Methane Hydrogen 45 / 80 Which acid is commonly used in car batteries? Sulphuric acid Nitric acid Hydrochloric acid 46 / 80 Which metal is most reactive according to the reactivity series? Potassium Gold Iron 47 / 80 Which disease is caused by the deficiency of iodine? Rickets Scurvy Goitre 48 / 80 What is the process of separating grains from chaff? Threshing Winnowing Sieving 49 / 80 What is the term for the process of heat transfer in fluids due to density differences? Radiation Convection Conduction 50 / 80 What is the device used to measure atmospheric pressure? Thermometer Hygrometer Barometer 51 / 80 What is the SI unit of power? Watt Volt Joule 52 / 80 What is the principle of an electric motor? Electromagnetic induction Electrolysis Electrostatic force 53 / 80 What is the main element present in diamonds? Silicon Sulphur Carbon 54 / 80 What is the unit of power in the SI system? Newton Watt Joule 55 / 80 What is the force acting on an object due to gravity called? Friction Tension Weight 56 / 80 What is the term for the energy possessed by a body due to its motion? Kinetic energy Potential energy Thermal energy 57 / 80 Which vitamin is essential for healthy eyes? Vitamin B Vitamin A Vitamin C 58 / 80 Which type of energy is stored in a stretched rubber band? Potential energy Kinetic energy Thermal energy 59 / 80 What is the term for the device used to convert mechanical energy into electrical energy? Generator Motor Transformer 60 / 80 What is the boiling point of water at sea level? 50°C 100°C 150°C 61 / 80 What is the unit of frequency? Watt Joule Hertz 62 / 80 What is the SI unit of energy? Calorie Joule Newton 63 / 80 What is the term for a chemical reaction in which heat is released? Neutralization Exothermic Endothermic 64 / 80 Which part of the eye controls the amount of light entering it? Iris Retina Cornea 65 / 80 What is the term for substances that increase the rate of chemical reactions? Catalysts Inhibitors Solvents 66 / 80 What is the name of the device used to measure electric potential difference? Galvanometer Ammeter Voltmeter 67 / 80 What is the name of the process by which plants release oxygen? Respiration Transpiration Photosynthesis 68 / 80 What is the chemical formula of quicklime? CaCO₃ Ca(OH)₂ CaO 69 / 80 What is the process of removing waste products from the body called? Ingestion Digestion Excretion 70 / 80 Which organelle is responsible for photosynthesis? Chloroplast Ribosome Mitochondria 71 / 80 What is the term for the smallest particle of an element? Ion Atom Molecule 72 / 80 Which type of energy transformation occurs in a hydroelectric power plant? Kinetic to electrical Chemical to kinetic Thermal to electrical 73 / 80 Which gas is required for combustion? Nitrogen Oxygen Helium 74 / 80 Which organ produces bile in the human body? Stomach Pancreas Liver 75 / 80 What is the SI unit of work? Newton Joule Pascal 76 / 80 Which component of blood helps in clotting? Platelets Plasma Red blood cells 77 / 80 Which gas is required for combustion to occur? Oxygen Carbon dioxide Nitrogen 78 / 80 Which gas is commonly known as "laughing gas"? Methane Nitrous oxide Carbon monoxide 79 / 80 What is the device used to measure atmospheric humidity? Barometer Thermometer Hygrometer 80 / 80 Which gas is a major component of biogas? Methane Carbon dioxide Oxygen Your score is LinkedIn Facebook VKontakte 0% Exit
