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 trend in reactivity of halogens down the group? Remains the same. Decreases. Increases. 2 / 80 Which group contains transition metals? d-block elements. p-block elements. s-block elements. 3 / 80 In the reaction 2H₂ + O₂ → 2H₂O, what is the ratio of hydrogen to water by volume? 2:02 2:01 1:01 4 / 80 What are elements in the d-block called? Transition metals Actinides Lanthanides 5 / 80 Who is known as the father of the periodic table? John Dalton Dmitri Mendeleev Antoine Lavoisier 6 / 80 What does 'g' represent in gravitation? Gravitational force Acceleration due to gravity Gravitational constant 7 / 80 What is an oxidation reaction? Reaction involving the gain of oxygen. Reaction involving loss of oxygen. Reaction involving gain of hydrogen. 8 / 80 State Newton’s Law of Gravitation. Every particle repels every other particle with a force directly proportional to their masses. The force between particles is independent of distance. Every particle of matter in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. 9 / 80 In a balanced chemical equation, the number of atoms of each element: Increases Remains the same Decreases 10 / 80 How does the value of 'g' change with altitude? It increases It decreases It remains the same 11 / 80 What is the name of the smallest unit of life? Cell Molecule Organ 12 / 80 What is the function of the ozone layer? Absorbs oxygen Traps heat Protects from harmful UV rays 13 / 80 What is the process of conversion of sugar into alcohol called? Fermentation Respiration Photosynthesis 14 / 80 What is the functional unit of the kidney? Neuron Nephron Alveolus 15 / 80 Which organelle is known as the powerhouse of the cell? Nucleus Mitochondria Ribosome 16 / 80 What is the chemical formula of gypsum? Ca(OH)₂ CaSO₄·2H₂O CaO 17 / 80 Which type of energy transformation occurs in a hydroelectric power plant? Chemical to kinetic Kinetic to electrical Thermal to electrical 18 / 80 What is the formula of common salt? KCl NaCl NaOH 19 / 80 What is the mode of nutrition in fungi? Heterotrophic Autotrophic Parasitic 20 / 80 What is the term for the amount of matter in an object? Volume Weight Mass 21 / 80 What is the process of removing soluble impurities from water? Filtration Sedimentation Decantation 22 / 80 What is the chemical formula of hydrochloric acid? HCl HNO₃ H₂SO₄ 23 / 80 What is the chemical name of vinegar? Formic acid Lactic acid Acetic acid 24 / 80 What is the pH value of acidic solutions? More than 7 Equal to 7 Less than 7 25 / 80 What is the process of separating grains from chaff? Winnowing Sieving Threshing 26 / 80 What is the term for the force per unit area applied on a surface? Volume Density Pressure 27 / 80 Which part of the human body contains the smallest bones? Hand Ear Nose 28 / 80 What is the process by which plants lose water in the form of vapor? Respiration Photosynthesis Transpiration 29 / 80 What is the formula of ethane? C₂H₄ C₂H₆ C₃H₈ 30 / 80 What is the phenomenon where light bends as it passes through different mediums? Diffraction Refraction Reflection 31 / 80 What is the main element present in diamonds? Sulphur Silicon Carbon 32 / 80 Which acid is present in lemon? Lactic acid Acetic acid Citric acid 33 / 80 What is the chemical formula of methane? CH₃OH CH₄ CH₄O 34 / 80 What is the role of chlorophyll in photosynthesis? Absorbing sunlight Absorbing carbon dioxide Absorbing oxygen 35 / 80 What is the phenomenon responsible for the blue color of the sky? Reflection Scattering of light Refraction 36 / 80 What is the formula of baking soda? Na₂CO₃ CaCO₃ NaHCO₃ 37 / 80 Which blood group is known as the universal donor? A AB O 38 / 80 Which planet in the solar system is known as the "Evening Star"? Venus Mars Mercury 39 / 80 What is the process of breaking down glucose to release energy called? Respiration Photosynthesis Digestion 40 / 80 What is the effect of rusting on the weight of iron? Increases No change Decreases 41 / 80 What is the name of the device used to measure electric potential difference? Voltmeter Ammeter Galvanometer 42 / 80 What is the term for substances that increase the rate of chemical reactions? Inhibitors Catalysts Solvents 43 / 80 What is the speed of light in a vacuum? 3 x 10⁷ m/s 3 x 10⁸ m/s 3 x 10⁶ m/s 44 / 80 What is the force acting on an object due to gravity called? Weight Friction Tension 45 / 80 What is the unit of power in the SI system? Joule Watt Newton 46 / 80 What is the primary pigment responsible for photosynthesis in plants? Xanthophyll Chlorophyll Carotene 47 / 80 Which gas is responsible for the greenhouse effect? Nitrogen Argon Carbon dioxide 48 / 80 What is the main cause of acid rain? Methane emission Sulphur dioxide Carbon monoxide 49 / 80 What is the process of converting liquid into vapor? Condensation Evaporation Sublimation 50 / 80 Which process is used for separating components of a mixture based on boiling points? Distillation Decantation Filtration 51 / 80 Which disease is caused by the deficiency of iodine? Goitre Rickets Scurvy 52 / 80 What is the name of the instrument used to measure temperature? Barometer Thermometer Hydrometer 53 / 80 What is the approximate percentage of nitrogen in Earth's atmosphere? 1% 21% 78% 54 / 80 Which gas is required for combustion to occur? Oxygen Carbon dioxide Nitrogen 55 / 80 What is the effect of acid rain on marble structures? Corrosion Sublimation No effect 56 / 80 What is the device used to convert AC to DC? Rectifier Transformer Oscillator 57 / 80 What is the term for the process of heat transfer in fluids due to density differences? Convection Radiation Conduction 58 / 80 What is the SI unit of power? Watt Joule Volt 59 / 80 What type of energy is stored in a stretched rubber band? Kinetic energy Potential energy Thermal energy 60 / 80 What is the pH value of pure water? 7 5.5 8 61 / 80 Which part of the human brain is responsible for thinking and decision-making? Cerebrum Hypothalamus Medulla oblongata 62 / 80 What is the main constituent of natural gas? Methane Butane Propane 63 / 80 What is the type of bond formed by the sharing of electrons? Metallic bond Covalent bond Ionic bond 64 / 80 What is the mode of reproduction in amoeba? Binary fission Spore formation Budding 65 / 80 What is the formula for calculating speed? Distance² ÷ Time Distance × Time Distance ÷ Time 66 / 80 What is the formula of rust? FeO Fe₂O₃.xH₂O FeCl₃ 67 / 80 What is the chemical symbol for gold? Au Ag Pb 68 / 80 What is the SI unit of work? Pascal Newton Joule 69 / 80 Which vitamin helps in blood clotting? Vitamin C Vitamin K Vitamin D 70 / 80 Which component of blood helps in clotting? Plasma Platelets Red blood cells 71 / 80 What is the term for the minimum amount of energy required to start a chemical reaction? Potential energy Activation energy Thermal energy 72 / 80 What is the function of xylem in plants? Transport of water Transport of food Transport of oxygen 73 / 80 What is the function of a fuse in an electric circuit? To generate electricity To protect the circuit from overload To store energy 74 / 80 Which organelle is called the powerhouse of the cell? Nucleus Mitochondria Ribosome 75 / 80 What is the unit of resistance? Ohm Ampere Volt 76 / 80 What is the main source of energy for the water cycle? Wind Sun Moon 77 / 80 What is the chemical formula of quicklime? Ca(OH)₂ CaCO₃ CaO 78 / 80 What is the chemical formula of quicklime? CaO Ca(OH)₂ CaCO₃ 79 / 80 Which organ produces bile in the human body? Pancreas Liver Stomach 80 / 80 Which organ filters and removes waste from the blood in humans? Liver Spleen Kidney Your score is LinkedIn Facebook VKontakte 0% Exit
