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? Gravitational force Acceleration due to gravity Gravitational constant 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 the pH of a neutral solution? 7 14 0 4 / 80 What are elements in the d-block called? Actinides Transition metals Lanthanides 5 / 80 How does gravity affect time? Slows down time near strong gravity. Speeds up time near strong gravity. Has no effect on time. 6 / 80 What is an oxidation reaction? Reaction involving the gain of oxygen. Reaction involving loss of oxygen. Reaction involving gain of hydrogen. 7 / 80 Which of the following is a noble gas? Sodium Neon Chlorine 8 / 80 Who is known as the father of the periodic table? Henry Moseley Dmitri Mendeleev Antoine Lavoisier 9 / 80 What are the elements in Group 17 called? Halogens Noble gases Alkali metals 10 / 80 What happens in an exothermic reaction? No heat change. Heat is released. Heat is absorbed. 11 / 80 Which organ in the human body stores bile? Gallbladder Liver Pancreas 12 / 80 What is the mode of nutrition in fungi? Autotrophic Heterotrophic Parasitic 13 / 80 What is the term for substances that increase the rate of chemical reactions? Catalysts Solvents Inhibitors 14 / 80 Which gas is required for combustion? Helium Nitrogen Oxygen 15 / 80 Which organ of the human body produces bile? Stomach Pancreas Liver 16 / 80 What is the function of the pancreas in the human body? Produces insulin Produces bile Produces hormones 17 / 80 What is the formula of rust? FeCl₃ FeO Fe₂O₃.xH₂O 18 / 80 What type of energy is stored in a stretched rubber band? Thermal energy Potential energy Kinetic energy 19 / 80 What is the term for the amount of matter in an object? Weight Volume Mass 20 / 80 What is the device used to convert AC to DC? Oscillator Rectifier Transformer 21 / 80 Which organelle is called the powerhouse of the cell? Ribosome Mitochondria Nucleus 22 / 80 What is the SI unit of work? Newton Joule Pascal 23 / 80 What is the chemical formula of gypsum? CaO CaSO₄·2H₂O Ca(OH)₂ 24 / 80 What is the chemical name of common salt? Calcium chloride Sodium chloride Potassium chloride 25 / 80 Which organ produces bile in the human body? Pancreas Liver Stomach 26 / 80 What is the term for the minimum amount of energy required to start a chemical reaction? Activation energy Potential energy Thermal energy 27 / 80 What is the function of xylem in plants? Transport of food Transport of oxygen Transport of water 28 / 80 Which is the longest bone in the human body? Humerus Femur Radius 29 / 80 Which gas is commonly known as "laughing gas"? Methane Nitrous oxide Carbon monoxide 30 / 80 What is the approximate percentage of nitrogen in Earth's atmosphere? 21% 78% 1% 31 / 80 What is the chemical formula of quicklime? Ca(OH)₂ CaO CaCO₃ 32 / 80 What is the chemical formula of baking soda? Na₂CO₃ NaHCO₃ NaCl 33 / 80 What is the SI unit of electric current? Ampere Watt Volt 34 / 80 What is the main element present in diamonds? Sulphur Carbon Silicon 35 / 80 Which gas is responsible for the greenhouse effect? Carbon dioxide Nitrogen Argon 36 / 80 What is the primary pigment responsible for photosynthesis in plants? Chlorophyll Xanthophyll Carotene 37 / 80 What is the function of the ozone layer? Protects from harmful UV rays Absorbs oxygen Traps heat 38 / 80 What is the name of the smallest unit of life? Organ Cell Molecule 39 / 80 What is the atomic number of oxygen? 8 16 10 40 / 80 What is the phenomenon where light bends as it passes through different mediums? Reflection Diffraction Refraction 41 / 80 Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid? Oxygen Carbon dioxide Hydrogen 42 / 80 What is the process of converting liquid into vapor? Evaporation Sublimation Condensation 43 / 80 What is the most abundant gas in Earth's atmosphere? Oxygen Nitrogen Argon 44 / 80 Which component of blood helps in clotting? Red blood cells Platelets Plasma 45 / 80 What is the chemical formula of limewater? CaO CaCO₃ Ca(OH)₂ 46 / 80 What is the SI unit of energy? Joule Calorie Newton 47 / 80 What is the chemical formula of hydrochloric acid? H₂SO₄ HCl HNO₃ 48 / 80 Which property of metals allows them to be drawn into wires? Malleability Conductivity Ductility 49 / 80 Which gas is required for combustion to occur? Oxygen Nitrogen Carbon dioxide 50 / 80 What is the formula of ethane? C₂H₆ C₂H₄ C₃H₈ 51 / 80 Which part of the eye controls the amount of light entering it? Cornea Iris Retina 52 / 80 Which acid is present in lemon? Acetic acid Lactic acid Citric acid 53 / 80 What is the process by which plants lose water in the form of vapor? Photosynthesis Transpiration Respiration 54 / 80 What is the main constituent of biogas? Methane Hydrogen Carbon dioxide 55 / 80 What is the name of the process by which plants release oxygen? Photosynthesis Respiration Transpiration 56 / 80 What is the SI unit of power? Joule Watt Volt 57 / 80 What is the main constituent of natural gas? Butane Propane Methane 58 / 80 What is the main cause of acid rain? Sulphur dioxide Methane emission Carbon monoxide 59 / 80 What is the device used to measure atmospheric humidity? Thermometer Hygrometer Barometer 60 / 80 What is the process by which plants convert sunlight into food? Respiration Photosynthesis Transpiration 61 / 80 What is the name of the process used to separate different pigments from a mixture? Filtration Chromatography Distillation 62 / 80 What is the term for the transfer of heat through direct contact? Convection Conduction Radiation 63 / 80 What is the speed of light in a vacuum? 3 × 10⁸ m/s 2 × 10⁸ m/s 1.5 × 10⁸ m/s 64 / 80 Which element is used in making thermometers? Copper Mercury Zinc 65 / 80 What is the formula of sodium hydroxide? Na₂CO₃ NaCl NaOH 66 / 80 What is the name of the process in which water changes directly into vapor without becoming a liquid? Condensation Sublimation Freezing 67 / 80 What is the functional unit of the kidney? Neuron Alveolus Nephron 68 / 80 What is the chemical symbol for gold? Ag Pb Au 69 / 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 70 / 80 What is the force acting on an object due to gravity called? Weight Tension Friction 71 / 80 Which vitamin helps in blood clotting? Vitamin K Vitamin C Vitamin D 72 / 80 What is the formula of acetic acid? H₂SO₄ HCl CH₃COOH 73 / 80 What is the main function of red blood cells? Transport oxygen Fight infections Transport nutrients 74 / 80 Which element is the most abundant in the Earth's crust? Carbon Oxygen Silicon 75 / 80 Which part of the human brain is responsible for thinking and decision-making? Cerebrum Hypothalamus Medulla oblongata 76 / 80 What is the process of breaking down glucose to release energy called? Photosynthesis Digestion Respiration 77 / 80 What is the pH value of a neutral solution? 14 0 7 78 / 80 What is the term for the force per unit area applied on a surface? Volume Pressure Density 79 / 80 What is the boiling point of ethanol? 78°C 100°C 78.5°C 80 / 80 What is the device used to measure atmospheric pressure? Hygrometer Thermometer Barometer Your score is LinkedIn Facebook VKontakte 0% Exit
