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 are the elements in Group 17 called? Halogens Noble gases Alkali metals 2 / 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 3 / 80 What is gravitation? The force of repulsion between any two objects. The force of attraction between any two objects in the universe. The force of attraction between two objects with the same charge. 4 / 80 What are the elements in Group 18 called? Noble gases Alkali metals Halogens 5 / 80 Define gravitational constant (G). 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. The mass of an object that is attracted by gravity. 6 / 80 What is the trend in melting points of alkali metals down the group? Decreases. Remains the same. Increases. 7 / 80 What is the general formula for a hydrocarbon? Hydroxide Hydrocarbon Hydrochloric acid 8 / 80 Why do noble gases have low reactivity? Because they have an incomplete outer electron shell. Because they have a high number of valence electrons. Because they have a complete outer electron shell. 9 / 80 What is an exothermic reaction? A reaction that neither absorbs nor releases energy. A reaction that releases energy in the form of heat. A reaction that absorbs energy from the surroundings. 10 / 80 Which group contains transition metals? d-block elements. p-block elements. s-block elements. 11 / 80 Which planet in the solar system is known as the "Evening Star"? Venus Mercury Mars 12 / 80 What is the mode of nutrition in fungi? Heterotrophic Parasitic Autotrophic 13 / 80 What is the functional unit of the kidney? Nephron Alveolus Neuron 14 / 80 Which part of the human body contains the smallest bones? Hand Ear Nose 15 / 80 What is the term for the natural process of converting nitrogen gas into compounds usable by plants? Combustion Nitrification Nitrogen fixation 16 / 80 Which type of energy transformation occurs in a hydroelectric power plant? Kinetic to electrical Thermal to electrical Chemical to kinetic 17 / 80 What is the effect of rusting on the weight of iron? Increases No change Decreases 18 / 80 What is the cause of dispersion of light? Reflection Different wavelengths Refraction 19 / 80 What is the term for the amount of matter in an object? Mass Volume Weight 20 / 80 Which organ of the human body produces bile? Pancreas Liver Stomach 21 / 80 What is the function of a fuse in an electric circuit? To protect the circuit from overload To generate electricity To store energy 22 / 80 What is the process of breaking down glucose to release energy called? Digestion Respiration Photosynthesis 23 / 80 What is the main function of hemoglobin in the blood? Transport oxygen Provide energy Fight infections 24 / 80 Which property of metals allows them to be drawn into wires? Ductility Malleability Conductivity 25 / 80 Which planet is known as the "Red Planet"? Mercury Mars Venus 26 / 80 Which disease is caused by the deficiency of iodine? Rickets Scurvy Goitre 27 / 80 Which element is the most abundant in the Earth's crust? Silicon Carbon Oxygen 28 / 80 What is the chemical name of washing soda? Sodium chloride Sodium carbonate Sodium hydroxide 29 / 80 Which part of the brain controls balance and coordination? Medulla oblongata Cerebellum Cerebrum 30 / 80 Which element is used in making thermometers? Zinc Mercury Copper 31 / 80 What is the most abundant gas in Earth's atmosphere? Nitrogen Oxygen Argon 32 / 80 What is the approximate percentage of nitrogen in Earth's atmosphere? 1% 78% 21% 33 / 80 Which organelle is responsible for photosynthesis? Chloroplast Ribosome Mitochondria 34 / 80 Which vitamin helps in blood clotting? Vitamin K Vitamin D Vitamin C 35 / 80 What is the function of the pancreas in the human body? Produces hormones Produces bile Produces insulin 36 / 80 What is the process of breaking down food to release energy in cells called? Fermentation Cellular respiration Transpiration 37 / 80 What is the formula of acetic acid? H₂SO₄ CH₃COOH HCl 38 / 80 What is the basic unit of heredity? Gene Chromosome DNA 39 / 80 What is the process by which plants lose water vapor through stomata? Respiration Transpiration Photosynthesis 40 / 80 What is the name of the instrument used to measure temperature? Thermometer Barometer Hydrometer 41 / 80 What is the chemical formula of limewater? CaCO₃ CaO Ca(OH)₂ 42 / 80 What is the term for the property of liquids to rise in a narrow tube? Capillarity Density Viscosity 43 / 80 What is the unit of power in the SI system? Joule Watt Newton 44 / 80 What is the effect of acid rain on marble structures? No effect Corrosion Sublimation 45 / 80 What is the term for the transfer of heat through direct contact? Radiation Conduction Convection 46 / 80 What is the main constituent of biogas? Carbon dioxide Hydrogen Methane 47 / 80 What is the term for the removal of topsoil by wind or water? Weathering Soil erosion Sedimentation 48 / 80 What is the process of conversion of sugar into alcohol called? Photosynthesis Respiration Fermentation 49 / 80 What is the term for the smallest particle of an element? Atom Ion Molecule 50 / 80 What type of lens is used to correct myopia? Concave Convex Cylindrical 51 / 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 52 / 80 What is the type of reproduction in which only one parent is involved? Sexual reproduction Asexual reproduction Hybrid reproduction 53 / 80 What is the formula of sodium hydroxide? Na₂CO₃ NaCl NaOH 54 / 80 What is the mode of reproduction in amoeba? Budding Spore formation Binary fission 55 / 80 What is the chemical name of common salt? Sodium chloride Potassium chloride Calcium chloride 56 / 80 What is the main constituent of natural gas? Butane Methane Propane 57 / 80 What is the chemical name of vinegar? Lactic acid Acetic acid Formic acid 58 / 80 What is the phenomenon where light bends as it passes through different mediums? Refraction Diffraction Reflection 59 / 80 What is the common name of calcium carbonate? Baking soda Limestone Quicklime 60 / 80 Which gas is required for combustion to occur? Carbon dioxide Oxygen Nitrogen 61 / 80 What is the chemical formula of baking soda? NaCl NaHCO₃ Na₂CO₃ 62 / 80 What is the type of bond formed by the sharing of electrons? Covalent bond Ionic bond Metallic bond 63 / 80 What is the term for the resistance of a fluid to flow? Capillarity Viscosity Density 64 / 80 What is the pH value of a neutral solution? 0 14 7 65 / 80 What is the term for the movement of particles from high concentration to low concentration? Active transport Osmosis Diffusion 66 / 80 What is the term for the number of protons in the nucleus of an atom? Atomic number Valency Mass number 67 / 80 What is the process of converting liquid into vapor? Sublimation Condensation Evaporation 68 / 80 Which organ produces bile in the human body? Pancreas Stomach Liver 69 / 80 Which process is used for the purification of seawater? Desalination Decantation Filtration 70 / 80 What is the force acting on an object due to gravity called? Tension Weight Friction 71 / 80 Which type of energy is stored in a stretched rubber band? Thermal energy Kinetic energy Potential energy 72 / 80 What is the term for the resistance of a liquid to flow? Viscosity Density Pressure 73 / 80 What is the chemical formula of quicklime? CaO CaCO₃ Ca(OH)₂ 74 / 80 What is the chemical symbol for gold? Pb Au Ag 75 / 80 What is the valency of nitrogen in NH₃? 4 5 3 76 / 80 What is the main cause of acid rain? Carbon monoxide Methane emission Sulphur dioxide 77 / 80 Which gas is evolved when zinc reacts with hydrochloric acid? Oxygen Hydrogen Carbon dioxide 78 / 80 What is the chemical formula of hydrochloric acid? HCl H₂SO₄ HNO₃ 79 / 80 What is the law of reflection of light? Light bends toward the normal Incident ray and reflected ray are perpendicular Angle of incidence = angle of reflection 80 / 80 What is the term for the minimum amount of energy required to start a chemical reaction? Potential energy Activation energy Thermal energy Your score is LinkedIn Facebook VKontakte 0% Exit
