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 does 'g' represent in gravitation? Acceleration due to gravity Gravitational force Gravitational constant 2 / 80 What is the role of an enzyme in a chemical reaction? Acts as a catalyst. Acts as a reactant. Acts as a product. 3 / 80 Define gravitational constant (G). 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. The acceleration due to gravity on Earth, equal to 9.8 m/s^2. 4 / 80 What happens to the weight of an object on the Moon compared to Earth? It increases It decreases It remains the same 5 / 80 What is the unit of gravitational constant (G)? N/m N m²/kg² kg/m³ 6 / 80 What is the electron configuration of chlorine (Cl)? 1s² 2s² 2p⁶ 3s² 3p⁶ 1s² 2s² 2p⁶ 3s² 3p⁵ 1s² 2s² 2p⁶ 3s¹ 7 / 80 Which element has the atomic number 8? Nitrogen Oxygen Carbon 8 / 80 Which element is found in Period 3, Group 2? Magnesium Calcium Sodium 9 / 80 What is gravitation? The force of attraction between two objects with the same charge. The force of attraction between any two objects in the universe. The force of repulsion between any two objects. 10 / 80 What is the significance of gravity in the solar system? Stops planets from moving. Keeps planets in orbit. Has no role. 11 / 80 What is the term for the change of state directly from solid to gas? Condensation Sublimation Evaporation 12 / 80 What is the process of separating grains from chaff? Sieving Winnowing Threshing 13 / 80 Which organ of the human body produces bile? Liver Pancreas Stomach 14 / 80 What is the full form of DNA? Deoxyribose nucleic acid Deoxyribonucleic acid Deoxynitrogen acid 15 / 80 What is the device used to convert AC to DC? Oscillator Rectifier Transformer 16 / 80 What is the cause of dispersion of light? Refraction Different wavelengths Reflection 17 / 80 Which gas is evolved when zinc reacts with hydrochloric acid? Carbon dioxide Hydrogen Oxygen 18 / 80 What is the formula of rust? Fe₂O₃.xH₂O FeCl₃ FeO 19 / 80 What is the device used to measure atmospheric humidity? Hygrometer Barometer Thermometer 20 / 80 What is the type of bond formed by the sharing of electrons? Ionic bond Metallic bond Covalent bond 21 / 80 What is the main constituent of natural gas? Butane Propane Methane 22 / 80 What is the term for the splitting of light into its constituent colors? Reflection Refraction Dispersion 23 / 80 What is the main ore of aluminium? Haematite Bauxite Magnetite 24 / 80 What is the term for a chemical reaction in which heat is released? Neutralization Endothermic Exothermic 25 / 80 Which vitamin helps in blood clotting? Vitamin C Vitamin D Vitamin K 26 / 80 What is the unit of frequency? Joule Hertz Watt 27 / 80 Which planet in the solar system is known as the "Evening Star"? Mars Venus Mercury 28 / 80 What is the formula for calculating speed? Distance ÷ Time Distance² ÷ Time Distance × Time 29 / 80 What is the main constituent of biogas? Carbon dioxide Hydrogen Methane 30 / 80 Which organelle is called the powerhouse of the cell? Mitochondria Ribosome Nucleus 31 / 80 Which gas is a major component of biogas? Methane Carbon dioxide Oxygen 32 / 80 Which type of energy is stored in a stretched rubber band? Kinetic energy Thermal energy Potential energy 33 / 80 Which part of the eye controls the amount of light entering it? Retina Cornea Iris 34 / 80 What is the main function of hemoglobin in the blood? Transport oxygen Fight infections Provide energy 35 / 80 Which organ produces bile in the human body? Pancreas Liver Stomach 36 / 80 What is the chemical formula of gypsum? CaSO₄·2H₂O CaO Ca(OH)₂ 37 / 80 Which part of the brain controls balance and coordination? Medulla oblongata Cerebellum Cerebrum 38 / 80 What is the chemical name of vinegar? Acetic acid Formic acid Lactic acid 39 / 80 Which type of bond is formed in H₂O? Ionic Metallic Covalent 40 / 80 What is the term for the process of heat transfer in fluids due to density differences? Conduction Radiation Convection 41 / 80 What is the type of reproduction in which only one parent is involved? Hybrid reproduction Asexual reproduction Sexual reproduction 42 / 80 What is the chemical formula of quicklime? Ca(OH)₂ CaO CaCO₃ 43 / 80 What is the term for the resistance of a fluid to flow? Viscosity Capillarity Density 44 / 80 Which planet is known as the "Red Planet"? Mercury Venus Mars 45 / 80 Which component of blood helps in clotting? Red blood cells Plasma Platelets 46 / 80 Which gas is responsible for the greenhouse effect? Nitrogen Argon Carbon dioxide 47 / 80 Which property of metals allows them to be drawn into wires? Malleability Conductivity Ductility 48 / 80 What is the speed of light in a vacuum? 1.5 × 10⁸ m/s 2 × 10⁸ m/s 3 × 10⁸ m/s 49 / 80 Which process is used for separating components of a mixture based on boiling points? Distillation Filtration Decantation 50 / 80 What is the SI unit of power? Volt Watt Joule 51 / 80 Which is the longest bone in the human body? Humerus Radius Femur 52 / 80 What is the SI unit of energy? Calorie Joule Newton 53 / 80 What is the speed of light in a vacuum? 3 x 10⁸ m/s 3 x 10⁶ m/s 3 x 10⁷ m/s 54 / 80 What is the device used to measure atmospheric pressure? Barometer Hygrometer Thermometer 55 / 80 What is the unit of resistance? Volt Ohm Ampere 56 / 80 What is the effect of rusting on the weight of iron? Decreases No change Increases 57 / 80 What is the phenomenon where light bends as it passes through different mediums? Diffraction Refraction Reflection 58 / 80 What is the boiling point of water at sea level? 100°C 50°C 150°C 59 / 80 What is the process by which plants convert sunlight into food? Transpiration Respiration Photosynthesis 60 / 80 What is the process of breaking down glucose to release energy called? Photosynthesis Digestion Respiration 61 / 80 What is the primary function of the stomata in plants? Gas exchange Food transport Water absorption 62 / 80 What is the term for the device used to convert mechanical energy into electrical energy? Transformer Generator Motor 63 / 80 Which part of the plant is responsible for photosynthesis? Leaf Stem Root 64 / 80 What is the SI unit of electric current? Ohm Ampere Volt 65 / 80 Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid? Hydrogen Carbon dioxide Oxygen 66 / 80 Which element is used in making thermometers? Copper Zinc Mercury 67 / 80 What is the product formed when magnesium reacts with oxygen? Magnesium oxide Magnesium carbonate Magnesium chloride 68 / 80 What is the term for the force per unit area applied on a surface? Density Pressure Volume 69 / 80 What is the main cause of acid rain? Sulphur dioxide Carbon monoxide Methane emission 70 / 80 What is the term for the natural process of converting nitrogen gas into compounds usable by plants? Combustion Nitrification Nitrogen fixation 71 / 80 What is the basic unit of heredity? Chromosome Gene DNA 72 / 80 Which organ in the human body stores bile? Pancreas Liver Gallbladder 73 / 80 What is the atomic number of oxygen? 10 8 16 74 / 80 Which type of energy transformation occurs in a hydroelectric power plant? Chemical to kinetic Thermal to electrical Kinetic to electrical 75 / 80 Which vitamin is essential for healthy eyes? Vitamin C Vitamin A Vitamin B 76 / 80 What is the chemical name of common salt? Potassium chloride Calcium chloride Sodium chloride 77 / 80 What is the principle of an electric motor? Electrolysis Electromagnetic induction Electrostatic force 78 / 80 What is the name of the device used to measure electric potential difference? Galvanometer Ammeter Voltmeter 79 / 80 What is the mode of reproduction in amoeba? Binary fission Budding Spore formation 80 / 80 Which gas is used in fire extinguishers? Carbon dioxide Hydrogen Oxygen Your score is LinkedIn Facebook VKontakte 0% Exit
