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 What is a black hole? A region with extremely strong gravitational force. A planet. A star. 2 / 80 What is the weight of a 10 kg object on Earth? 9.8 N 100 N 98 N 3 / 80 What is the relation between mass and weight? Weight = Mass × g Weight = Mass × G Weight = Mass/g 4 / 80 What type of reaction is H₂ + Cl₂ → 2HCl? Displacement reaction. Decomposition reaction. Combination reaction. 5 / 80 What is the balanced equation for the reaction: Al + O₂ → Al₂O₃? 4Al + 3O₂ → 2Al₂O₃ 2Al + O₂ → Al₂O₃ Al + O₂ → Al₂O₃ 6 / 80 What is ionization energy? Energy needed to split an atom. Energy released when an atom gains an electron. Energy required to remove an electron from an atom. 7 / 80 What is gravitational potential energy dependent on? Color and shape of the object. Height and mass of the object. Velocity and mass of the object. 8 / 80 What type of reaction is Zn + CuSO₄ → ZnSO₄ + Cu? Combination reaction. Decomposition reaction. Displacement reaction. 9 / 80 What is the common characteristic of elements in the same period? Same chemical reactivity Same number of electron shells Same atomic number 10 / 80 Who is known as the father of the periodic table? Dmitri Mendeleev Henry Moseley Antoine Lavoisier 11 / 80 What is the process by which plants convert sunlight into food? Transpiration Photosynthesis Respiration 12 / 80 What is the pH value of pure water? 8 5.5 7 13 / 80 Which organelle is responsible for photosynthesis? Chloroplast Ribosome Mitochondria 14 / 80 What is the process of separating grains from chaff? Sieving Threshing Winnowing 15 / 80 What is the chemical symbol for gold? Pb Ag Au 16 / 80 What is the chemical name of common salt? Sodium chloride Potassium chloride Calcium chloride 17 / 80 What is the term for the resistance of a fluid to flow? Viscosity Density Capillarity 18 / 80 What is the name of the device used to measure electric potential difference? Voltmeter Galvanometer Ammeter 19 / 80 What is the basic unit of heredity? DNA Chromosome Gene 20 / 80 What is the process by which plants lose water in the form of vapor? Respiration Photosynthesis Transpiration 21 / 80 What is the product formed when magnesium reacts with oxygen? Magnesium chloride Magnesium carbonate Magnesium oxide 22 / 80 What is the term for the smallest particle of an element? Ion Atom Molecule 23 / 80 What is the term for the property of liquids to rise in a narrow tube? Capillarity Density Viscosity 24 / 80 Which type of bond is formed in H₂O? Metallic Ionic Covalent 25 / 80 What is the process of conversion of sugar into alcohol called? Photosynthesis Respiration Fermentation 26 / 80 What is the unit of resistance? Ohm Volt Ampere 27 / 80 Which element is the most abundant in the Earth's crust? Silicon Carbon Oxygen 28 / 80 What is the unit of power in the SI system? Watt Joule Newton 29 / 80 Which disease is caused by the deficiency of iodine? Rickets Scurvy Goitre 30 / 80 Which part of the human brain is responsible for thinking and decision-making? Medulla oblongata Hypothalamus Cerebrum 31 / 80 What is the chemical name of washing soda? Sodium hydroxide Sodium carbonate Sodium chloride 32 / 80 What is the outermost layer of the Earth called? Crust Mantle Core 33 / 80 Which part of the eye controls the amount of light entering it? Cornea Retina Iris 34 / 80 What is the valency of nitrogen in NH₃? 5 3 4 35 / 80 What is the SI unit of electric current? Volt Watt Ampere 36 / 80 What is the unit of frequency? Joule Hertz Watt 37 / 80 What is the process by which plants lose water vapor through stomata? Transpiration Photosynthesis Respiration 38 / 80 Which process is used for the purification of seawater? Decantation Desalination Filtration 39 / 80 Which gas is required for combustion? Oxygen Helium Nitrogen 40 / 80 What is the primary source of energy on Earth? Sun Fossil fuels Electricity 41 / 80 Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid? Carbon dioxide Hydrogen Oxygen 42 / 80 Which organelle is called the powerhouse of the cell? Nucleus Ribosome Mitochondria 43 / 80 What is the term for the splitting of light into its constituent colors? Reflection Dispersion Refraction 44 / 80 Which part of the human body contains the smallest bones? Hand Ear Nose 45 / 80 What is the term for the number of protons in the nucleus of an atom? Valency Atomic number Mass number 46 / 80 What is the full form of DNA? Deoxyribose nucleic acid Deoxyribonucleic acid Deoxynitrogen acid 47 / 80 What is the device used to measure atmospheric humidity? Barometer Thermometer Hygrometer 48 / 80 Which acid is commonly used in car batteries? Sulphuric acid Hydrochloric acid Nitric acid 49 / 80 What is the term for the process of heat transfer in fluids due to density differences? Conduction Convection Radiation 50 / 80 What is the process of converting liquid into gas at any temperature called? Evaporation Condensation Freezing 51 / 80 What is the chemical formula of hydrochloric acid? HNO₃ H₂SO₄ HCl 52 / 80 Which type of energy transformation occurs in a hydroelectric power plant? Kinetic to electrical Chemical to kinetic Thermal to electrical 53 / 80 What is the formula for calculating speed? Distance × Time Distance² ÷ Time Distance ÷ Time 54 / 80 What is the term for the amount of matter in an object? Weight Mass Volume 55 / 80 What is the boiling point of water at sea level? 100°C 50°C 150°C 56 / 80 What is the mode of nutrition in fungi? Parasitic Autotrophic Heterotrophic 57 / 80 Which gas is responsible for the greenhouse effect? Nitrogen Argon Carbon dioxide 58 / 80 What is the name of the smallest unit of life? Organ Molecule Cell 59 / 80 What is the SI unit of power? Volt Joule Watt 60 / 80 What type of lens is used to correct myopia? Concave Convex Cylindrical 61 / 80 Which organ in the human body is responsible for pumping blood? Heart Liver Lungs 62 / 80 What is the functional unit of the kidney? Alveolus Neuron Nephron 63 / 80 What is the process of breaking down food to release energy in cells called? Transpiration Cellular respiration Fermentation 64 / 80 What is the phenomenon responsible for the blue color of the sky? Scattering of light Refraction Reflection 65 / 80 Which part of the plant is responsible for photosynthesis? Root Leaf Stem 66 / 80 What is the name of the instrument used to measure temperature? Barometer Hydrometer Thermometer 67 / 80 What is the term for organisms that can prepare their own food? Autotrophs Parasites Decomposers 68 / 80 What is the process of depositing a layer of metal on another material using electricity? Alloying Electroplating Rusting 69 / 80 What is the function of the pancreas in the human body? Produces insulin Produces hormones Produces bile 70 / 80 Which organ of the human body produces bile? Stomach Pancreas Liver 71 / 80 What is the formula of ethane? C₃H₈ C₂H₄ C₂H₆ 72 / 80 What is the common name of calcium carbonate? Quicklime Limestone Baking soda 73 / 80 What is the pH value of a neutral solution? 7 0 14 74 / 80 What is the name of the process in which water changes directly into vapor without becoming a liquid? Freezing Condensation Sublimation 75 / 80 Which is the longest bone in the human body? Radius Humerus Femur 76 / 80 What is the most abundant gas in Earth's atmosphere? Oxygen Nitrogen Argon 77 / 80 Which component of blood helps in clotting? Red blood cells Platelets Plasma 78 / 80 Which organ in the human body is responsible for filtering blood? Kidney Liver Heart 79 / 80 What is the natural satellite of Earth? Sun Mars Moon 80 / 80 What is the phenomenon where light bends as it passes through different mediums? Refraction Diffraction Reflection Your score is LinkedIn Facebook VKontakte 0% Exit
