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 the trend of reactivity in alkali metals down the group? It increases It decreases It remains the same 2 / 80 Which element is a lanthanide? Uranium Argon Cerium 3 / 80 What is a decomposition reaction? Two substances exchange ions. Two substances combine to form a single product. A single substance breaks down into two or more substances. 4 / 80 How many periods are there in the modern periodic table? 6 7 8 5 / 80 What is the unit of gravitational constant (G)? N/m kg/m³ N m²/kg² 6 / 80 What is the trend in reactivity of halogens down the group? Increases. Decreases. Remains the same. 7 / 80 The periodic law states that the properties of elements are a periodic function of their: Atomic number Atomic mass Electron affinity 8 / 80 Which element is a metalloid? Silicon Sodium Oxygen 9 / 80 What is free fall? The motion of an object falling solely under the influence of gravity. The motion of an object under the influence of both gravity and air resistance. The motion of an object falling with constant velocity. 10 / 80 What happens to the weight of an object on the Moon compared to Earth? It increases It decreases It remains the same 11 / 80 What is the main ore of aluminium? Bauxite Magnetite Haematite 12 / 80 What is the force acting on an object due to gravity called? Weight Tension Friction 13 / 80 Which disease is caused by the deficiency of iodine? Rickets Scurvy Goitre 14 / 80 What is the formula of acetic acid? H₂SO₄ HCl CH₃COOH 15 / 80 What is the unit of power in the SI system? Joule Watt Newton 16 / 80 What is the process of removing soluble impurities from water? Decantation Filtration Sedimentation 17 / 80 What is the mode of nutrition in fungi? Autotrophic Parasitic Heterotrophic 18 / 80 What is the main gas responsible for the greenhouse effect? Nitrogen Carbon dioxide Oxygen 19 / 80 What is the role of chlorophyll in photosynthesis? Absorbing carbon dioxide Absorbing oxygen Absorbing sunlight 20 / 80 What is the chemical formula of quicklime? Ca(OH)₂ CaCO₃ CaO 21 / 80 What is the chemical formula of baking soda? Na₂CO₃ NaHCO₃ NaCl 22 / 80 Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid? Carbon dioxide Oxygen Hydrogen 23 / 80 What is the outermost layer of the Earth called? Crust Mantle Core 24 / 80 What is the principle of an electric motor? Electrolysis Electromagnetic induction Electrostatic force 25 / 80 Which vitamin is essential for healthy eyes? Vitamin B Vitamin A Vitamin C 26 / 80 What is the formula of sodium hydroxide? NaCl Na₂CO₃ NaOH 27 / 80 What is the full form of DNA? Deoxynitrogen acid Deoxyribonucleic acid Deoxyribose nucleic acid 28 / 80 What is the term for organisms that can prepare their own food? Decomposers Autotrophs Parasites 29 / 80 What is the primary source of energy on Earth? Sun Fossil fuels Electricity 30 / 80 What is the main function of red blood cells? Fight infections Transport nutrients Transport oxygen 31 / 80 Which gas is evolved when zinc reacts with hydrochloric acid? Hydrogen Carbon dioxide Oxygen 32 / 80 What is the chemical name of common salt? Potassium chloride Calcium chloride Sodium chloride 33 / 80 Which blood group is known as the universal donor? O AB A 34 / 80 What is the process of depositing a layer of metal on another material using electricity? Electroplating Rusting Alloying 35 / 80 What is the name of the device used to measure electric potential difference? Voltmeter Galvanometer Ammeter 36 / 80 What is the function of the pancreas in the human body? Produces insulin Produces hormones Produces bile 37 / 80 Which acid is commonly used in car batteries? Nitric acid Sulphuric acid Hydrochloric acid 38 / 80 Which organelle is called the powerhouse of the cell? Mitochondria Ribosome Nucleus 39 / 80 What is the functional unit of the kidney? Alveolus Nephron Neuron 40 / 80 What is the term for the smallest particle of an element? Atom Molecule Ion 41 / 80 What is the product formed when magnesium reacts with oxygen? Magnesium chloride Magnesium carbonate Magnesium oxide 42 / 80 What is the type of bond formed by the sharing of electrons? Metallic bond Covalent bond Ionic bond 43 / 80 Which organ in the human body stores bile? Gallbladder Pancreas Liver 44 / 80 What is the formula of ethane? C₂H₆ C₃H₈ C₂H₄ 45 / 80 What is the pH value of a basic solution? Less than 7 More than 7 Equal to 7 46 / 80 What is the term for the energy possessed by a body due to its motion? Kinetic energy Potential energy Thermal energy 47 / 80 What is the primary pigment responsible for photosynthesis in plants? Chlorophyll Xanthophyll Carotene 48 / 80 What is the term for the minimum amount of energy required to start a chemical reaction? Thermal energy Potential energy Activation energy 49 / 80 What is the atomic number of oxygen? 10 16 8 50 / 80 What is the term for the force per unit area applied on a surface? Pressure Volume Density 51 / 80 What is the process of converting liquid into gas at any temperature called? Evaporation Condensation Freezing 52 / 80 What is the term for the removal of topsoil by wind or water? Soil erosion Weathering Sedimentation 53 / 80 Which organ in the human body is responsible for filtering blood? Kidney Heart Liver 54 / 80 What is the main cause of acid rain? Sulphur dioxide Carbon monoxide Methane emission 55 / 80 Which planet in the solar system is known as the "Evening Star"? Mercury Mars Venus 56 / 80 What is the process by which plants lose water in the form of vapor? Photosynthesis Respiration Transpiration 57 / 80 What type of energy is stored in a stretched rubber band? Thermal energy Kinetic energy Potential energy 58 / 80 What is the term for the resistance of a liquid to flow? Density Pressure Viscosity 59 / 80 What is the term for the number of protons in the nucleus of an atom? Atomic number Mass number Valency 60 / 80 What is the pH value of pure water? 8 7 5.5 61 / 80 Which planet is known as the Red Planet? Mars Venus Mercury 62 / 80 Which part of the brain controls balance and coordination? Cerebellum Medulla oblongata Cerebrum 63 / 80 What is the process of removing waste products from the body called? Ingestion Digestion Excretion 64 / 80 What is the phenomenon where light bends as it passes through different mediums? Diffraction Reflection Refraction 65 / 80 What is the effect of acid rain on marble structures? Corrosion Sublimation No effect 66 / 80 Which process is used for separating components of a mixture based on boiling points? Filtration Decantation Distillation 67 / 80 Which property of metals allows them to be drawn into wires? Ductility Conductivity Malleability 68 / 80 Which organ in the human body is responsible for pumping blood? Lungs Liver Heart 69 / 80 Which type of bond is formed in H₂O? Metallic Covalent Ionic 70 / 80 Which gas is required for combustion to occur? Oxygen Nitrogen Carbon dioxide 71 / 80 Which metal is most reactive according to the reactivity series? Potassium Gold Iron 72 / 80 Which process is used for the purification of seawater? Desalination Decantation Filtration 73 / 80 What is the term for the transfer of heat through direct contact? Convection Conduction Radiation 74 / 80 What is the phenomenon responsible for the blue color of the sky? Refraction Scattering of light Reflection 75 / 80 What is the pH value of a neutral solution? 7 14 0 76 / 80 Which part of the human body contains the smallest bones? Hand Nose Ear 77 / 80 What is the formula of rust? FeCl₃ FeO Fe₂O₃.xH₂O 78 / 80 Which organ produces bile in the human body? Liver Pancreas Stomach 79 / 80 What is the primary function of the stomata in plants? Food transport Gas exchange Water absorption 80 / 80 What is the device used to measure atmospheric humidity? Thermometer Barometer Hygrometer Your score is LinkedIn Facebook VKontakte 0% Exit
