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 atomic number of neon? 20 10 18 2 / 80 How are elements classified in the periodic table? Elements are classified into s, p, d, and f blocks based on their electron configurations. Elements are classified based on their chemical reactivity. Elements are classified based on their physical states. 3 / 80 Define gravitational constant (G). The acceleration due to gravity on Earth, equal to 9.8 m/s^2. The mass of an object that is attracted by gravity. The proportionality constant used in Newton's Law of Gravitation, equal to 6.674×10^-11 N(m/kg)^2. 4 / 80 What happens to atomic radius down a group? It increases It decreases It remains the same 5 / 80 State the formula for gravitational force. F = G*(m1-m2)/r^2 F = G*(m1+m2)/r^2 F = G*(m1*m2)/r^2 6 / 80 What is the weight of a 10 kg object on Earth? 98 N 100 N 9.8 N 7 / 80 What is the balanced chemical equation for the reaction of hydrogen and oxygen to form water? H₂ + O₂ → H₂O 2H₂ + O₂ → 2H₂O 2H₂ + O₂ → H₂O₂ 8 / 80 What happens to the weight of an object on the Moon compared to Earth? It remains the same It decreases It increases 9 / 80 How does the value of 'g' change with depth? It remains the same It decreases It increases 10 / 80 What is a redox reaction? A reaction involving oxidation and reduction. A reaction involving only oxidation. A reaction involving only reduction. 11 / 80 Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid? Carbon dioxide Hydrogen Oxygen 12 / 80 Which part of the brain controls balance and coordination? Medulla oblongata Cerebrum Cerebellum 13 / 80 What is the boiling point of water at sea level? 150°C 100°C 50°C 14 / 80 What is the formula of ethane? C₂H₆ C₃H₈ C₂H₄ 15 / 80 Which is the longest bone in the human body? Humerus Radius Femur 16 / 80 What is the term for organisms that can prepare their own food? Parasites Decomposers Autotrophs 17 / 80 What is the process of depositing a layer of metal on another material using electricity? Alloying Electroplating Rusting 18 / 80 Which organelle is known as the powerhouse of the cell? Nucleus Ribosome Mitochondria 19 / 80 What is the type of reproduction in which only one parent is involved? Asexual reproduction Sexual reproduction Hybrid reproduction 20 / 80 What is the formula of rust? Fe₂O₃.xH₂O FeO FeCl₃ 21 / 80 What is the name of the process by which plants release oxygen? Photosynthesis Transpiration Respiration 22 / 80 What type of energy is stored in a stretched rubber band? Kinetic energy Thermal energy Potential energy 23 / 80 What is the pH value of a basic solution? Equal to 7 More than 7 Less than 7 24 / 80 What is the primary source of energy on Earth? Sun Fossil fuels Electricity 25 / 80 What is the process of converting liquid into vapor? Sublimation Evaporation Condensation 26 / 80 What is the main function of white blood cells? Transport oxygen Fight infections Provide energy 27 / 80 What is the mode of nutrition in fungi? Heterotrophic Autotrophic Parasitic 28 / 80 What is the name of the process used to separate different pigments from a mixture? Distillation Filtration Chromatography 29 / 80 What is the natural satellite of Earth? Sun Mars Moon 30 / 80 What is the primary function of the stomata in plants? Water absorption Food transport Gas exchange 31 / 80 What is the term for the splitting of light into its constituent colors? Dispersion Refraction Reflection 32 / 80 What is the formula of common salt? NaOH KCl NaCl 33 / 80 What is the most abundant gas in Earth's atmosphere? Nitrogen Oxygen Argon 34 / 80 What is the phenomenon responsible for the blue color of the sky? Scattering of light Reflection Refraction 35 / 80 What is the term for substances that increase the rate of chemical reactions? Catalysts Inhibitors Solvents 36 / 80 What is the speed of light in a vacuum? 3 x 10⁶ m/s 3 x 10⁸ m/s 3 x 10⁷ m/s 37 / 80 What is the term for the number of protons in the nucleus of an atom? Mass number Valency Atomic number 38 / 80 What type of lens is used to correct myopia? Concave Cylindrical Convex 39 / 80 What is the chemical formula of quicklime? Ca(OH)₂ CaCO₃ CaO 40 / 80 What is the term for the device used to convert mechanical energy into electrical energy? Generator Motor Transformer 41 / 80 What is the speed of light in a vacuum? 3 × 10⁸ m/s 1.5 × 10⁸ m/s 2 × 10⁸ m/s 42 / 80 What is the approximate percentage of nitrogen in Earth's atmosphere? 21% 78% 1% 43 / 80 Which vitamin is also known as ascorbic acid? Vitamin D Vitamin C Vitamin B 44 / 80 What is the main ore of aluminium? Bauxite Haematite Magnetite 45 / 80 What is the chemical formula of hydrochloric acid? HCl H₂SO₄ HNO₃ 46 / 80 What is the main component of a cell wall in plants? Lipid Cellulose Protein 47 / 80 Which part of the human body contains the smallest bones? Ear Nose Hand 48 / 80 What is the formula of acetic acid? H₂SO₄ CH₃COOH HCl 49 / 80 What is the process by which plants lose water in the form of vapor? Photosynthesis Transpiration Respiration 50 / 80 What is the functional unit of the kidney? Nephron Alveolus Neuron 51 / 80 Which gas is required for combustion? Nitrogen Oxygen Helium 52 / 80 What is the term for the energy possessed by a body due to its motion? Kinetic energy Potential energy Thermal energy 53 / 80 What is the main constituent of natural gas? Methane Propane Butane 54 / 80 What is the chemical name of common salt? Sodium chloride Potassium chloride Calcium chloride 55 / 80 What is the formula for calculating speed? Distance × Time Distance ÷ Time Distance² ÷ Time 56 / 80 What is the mode of reproduction in amoeba? Spore formation Budding Binary fission 57 / 80 What is the pH value of pure water? 7 8 5.5 58 / 80 Which process is used for separating components of a mixture based on boiling points? Distillation Decantation Filtration 59 / 80 Which planet in the solar system is known as the "Evening Star"? Mars Mercury Venus 60 / 80 What is the function of a fuse in an electric circuit? To generate electricity To store energy To protect the circuit from overload 61 / 80 What is the term for the minimum amount of energy required to start a chemical reaction? Activation energy Potential energy Thermal energy 62 / 80 What is the chemical name of washing soda? Sodium hydroxide Sodium carbonate Sodium chloride 63 / 80 What is the term for the removal of topsoil by wind or water? Sedimentation Soil erosion Weathering 64 / 80 Which organ in the human body stores bile? Pancreas Gallbladder Liver 65 / 80 Which gas is required for combustion to occur? Oxygen Carbon dioxide Nitrogen 66 / 80 What is the SI unit of work? Newton Pascal Joule 67 / 80 What is the energy change in a chemical reaction that absorbs heat? Endothermic Neutralization Exothermic 68 / 80 What is the term for the natural process of converting nitrogen gas into compounds usable by plants? Nitrogen fixation Combustion Nitrification 69 / 80 What is the name of the process in which water changes directly into vapor without becoming a liquid? Sublimation Condensation Freezing 70 / 80 What is the process of breaking down glucose to release energy called? Digestion Photosynthesis Respiration 71 / 80 What is the formula of sodium hydroxide? NaOH Na₂CO₃ NaCl 72 / 80 Which organ produces bile in the human body? Pancreas Liver Stomach 73 / 80 Which gas is commonly known as "laughing gas"? Nitrous oxide Methane Carbon monoxide 74 / 80 What is the device used to convert AC to DC? Oscillator Transformer Rectifier 75 / 80 What is the SI unit of power? Volt Watt Joule 76 / 80 Which property of metals allows them to be drawn into wires? Conductivity Malleability Ductility 77 / 80 What is the term for the property of liquids to rise in a narrow tube? Density Viscosity Capillarity 78 / 80 Which gas is used in fire extinguishers? Carbon dioxide Oxygen Hydrogen 79 / 80 Which organ in the human body is responsible for filtering blood? Heart Kidney Liver 80 / 80 What is the term for the splitting of a nucleus into two smaller nuclei, releasing energy? Radioactivity Nuclear fission Nuclear fusion Your score is LinkedIn Facebook VKontakte 0% Exit
