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 gravitational binding energy? Energy required to break an object apart. Energy produced by an object. Energy used to heat an object. 2 / 80 Which element is a noble gas? Chlorine Argon Bromine 3 / 80 Which group contains transition metals? p-block elements. d-block elements. s-block elements. 4 / 80 What is the approximate value of 'g' on Earth's surface? 6.674 × 10^-11 N m²/kg² 3.14 9.8 m/s² 5 / 80 What is a reversible reaction? A reaction that does not proceed. A reaction that only proceeds in one direction. A reaction that can proceed in both directions. 6 / 80 The reaction of an acid with a base to form salt and water is called: Combustion Decomposition Neutralization 7 / 80 What is the effect of temperature on the rate of reaction? Decreases with increase in temperature. Remains the same. Increases with increase in temperature. 8 / 80 Which element is found in Period 3, Group 2? Sodium Calcium Magnesium 9 / 80 What is the unit of gravitational constant (G)? N/m N m²/kg² kg/m³ 10 / 80 What is the electron configuration of chlorine (Cl)? 1s² 2s² 2p⁶ 3s¹ 1s² 2s² 2p⁶ 3s² 3p⁵ 1s² 2s² 2p⁶ 3s² 3p⁶ 11 / 80 What is the term for the number of protons in the nucleus of an atom? Mass number Atomic number Valency 12 / 80 What is the formula of acetic acid? H₂SO₄ CH₃COOH HCl 13 / 80 What is the function of xylem in plants? Transport of oxygen Transport of water Transport of food 14 / 80 What is the function of the pancreas in the human body? Produces hormones Produces bile Produces insulin 15 / 80 What is the primary source of energy on Earth? Fossil fuels Electricity Sun 16 / 80 What is the pH value of a basic solution? More than 7 Less than 7 Equal to 7 17 / 80 What is the process of depositing a layer of metal on another material using electricity? Electroplating Alloying Rusting 18 / 80 What is the formula of sodium hydroxide? NaCl NaOH Na₂CO₃ 19 / 80 What is the principle of an electric motor? Electromagnetic induction Electrostatic force Electrolysis 20 / 80 Which organ in the human body is responsible for pumping blood? Heart Liver Lungs 21 / 80 Which process is used for separating components of a mixture based on boiling points? Decantation Filtration Distillation 22 / 80 What is the valency of nitrogen in NH₃? 3 4 5 23 / 80 What is the name of the smallest unit of life? Molecule Organ Cell 24 / 80 What is the term for the movement of particles from high concentration to low concentration? Osmosis Diffusion Active transport 25 / 80 What is the chemical formula of quicklime? CaO Ca(OH)₂ CaCO₃ 26 / 80 What is the mode of nutrition in fungi? Autotrophic Parasitic Heterotrophic 27 / 80 What is the common name of calcium carbonate? Limestone Quicklime Baking soda 28 / 80 What is the main constituent of biogas? Methane Hydrogen Carbon dioxide 29 / 80 What is the main function of hemoglobin in the blood? Fight infections Provide energy Transport oxygen 30 / 80 What is the chemical formula of hydrochloric acid? HNO₃ HCl H₂SO₄ 31 / 80 What is the process of removing waste products from the body called? Excretion Ingestion Digestion 32 / 80 What is the boiling point of ethanol? 100°C 78°C 78.5°C 33 / 80 What is the SI unit of electric current? Ampere Watt Volt 34 / 80 What is the phenomenon responsible for the blue color of the sky? Refraction Reflection Scattering of light 35 / 80 What is the process of converting liquid into gas at any temperature called? Freezing Evaporation Condensation 36 / 80 What is the role of chlorophyll in photosynthesis? Absorbing carbon dioxide Absorbing sunlight Absorbing oxygen 37 / 80 What is the term for the process of heat transfer in fluids due to density differences? Convection Radiation Conduction 38 / 80 What is the natural satellite of Earth? Moon Mars Sun 39 / 80 Which organ in the human body is responsible for filtering blood? Kidney Liver Heart 40 / 80 What is the device used to measure atmospheric pressure? Hygrometer Thermometer Barometer 41 / 80 Which planet is known as the "Red Planet"? Mercury Mars Venus 42 / 80 Which organelle is called the powerhouse of the cell? Nucleus Ribosome Mitochondria 43 / 80 Which gas is evolved when zinc reacts with hydrochloric acid? Oxygen Carbon dioxide Hydrogen 44 / 80 What is the main constituent of natural gas? Methane Butane Propane 45 / 80 What is the term for the energy possessed by a body due to its motion? Kinetic energy Potential energy Thermal energy 46 / 80 Which acid is present in lemon? Citric acid Lactic acid Acetic acid 47 / 80 What is the device used to convert AC to DC? Oscillator Transformer Rectifier 48 / 80 What is the chemical name of washing soda? Sodium chloride Sodium carbonate Sodium hydroxide 49 / 80 What is the name of the instrument used to measure temperature? Thermometer Barometer Hydrometer 50 / 80 What is the term for the splitting of a nucleus into two smaller nuclei, releasing energy? Nuclear fission Radioactivity Nuclear fusion 51 / 80 What is the chemical formula of limewater? CaO CaCO₃ Ca(OH)₂ 52 / 80 What is the cause of dispersion of light? Refraction Different wavelengths Reflection 53 / 80 What is the process by which plants lose water in the form of vapor? Photosynthesis Respiration Transpiration 54 / 80 Which gas is responsible for the greenhouse effect? Argon Carbon dioxide Nitrogen 55 / 80 What is the effect of acid rain on marble structures? Corrosion No effect Sublimation 56 / 80 Which gas is a major component of biogas? Carbon dioxide Oxygen Methane 57 / 80 What is the term for the natural process of converting nitrogen gas into compounds usable by plants? Nitrification Nitrogen fixation Combustion 58 / 80 Which process is used for the purification of seawater? Desalination Filtration Decantation 59 / 80 What is the approximate percentage of nitrogen in Earth's atmosphere? 78% 1% 21% 60 / 80 What is the name of the process used to separate different pigments from a mixture? Distillation Filtration Chromatography 61 / 80 What is the unit of resistance? Ampere Ohm Volt 62 / 80 What is the SI unit of electric current? Ampere Volt Ohm 63 / 80 What is the name of the device used to measure electric potential difference? Voltmeter Ammeter Galvanometer 64 / 80 What is the process of removing soluble impurities from water? Sedimentation Filtration Decantation 65 / 80 What is the process by which plants convert sunlight into food? Photosynthesis Transpiration Respiration 66 / 80 What is the effect of rusting on the weight of iron? No change Increases Decreases 67 / 80 What is the atomic number of oxygen? 10 8 16 68 / 80 What is the process of breaking down glucose to release energy called? Photosynthesis Digestion Respiration 69 / 80 Which vitamin is also known as ascorbic acid? Vitamin C Vitamin B Vitamin D 70 / 80 What is the formula of common salt? NaCl KCl NaOH 71 / 80 What is the type of bond formed by the sharing of electrons? Metallic bond Covalent bond Ionic bond 72 / 80 What is the unit of power in the SI system? Newton Watt Joule 73 / 80 What is the main element present in diamonds? Carbon Silicon Sulphur 74 / 80 Which blood group is known as the universal donor? O AB A 75 / 80 What is the SI unit of power? Watt Joule Volt 76 / 80 What is the main source of energy for the water cycle? Moon Sun Wind 77 / 80 What is the formula of ethane? C₃H₈ C₂H₆ C₂H₄ 78 / 80 What is the term for the splitting of light into its constituent colors? Refraction Reflection Dispersion 79 / 80 What is the formula of baking soda? Na₂CO₃ NaHCO₃ CaCO₃ 80 / 80 What is the energy change in a chemical reaction that absorbs heat? Neutralization Endothermic Exothermic Your score is LinkedIn Facebook VKontakte 0% Exit
