What are the important questions for CBSE Science exam?

<div><div><div><div><div>&nbsp;</div></div></div></div></div><div><div dir="auto" data-message-author-role="assistant" data-message-id="09c25f61-88c6-4996-b827-7a6baeb1615b" data-message-model-slug="gpt-4o-mini"><p>Dear Lolat, </p><p>To assist you in preparing for your CBSE Science exam, here are some important questions from each chapter:</p><p><strong>1. Chemical Reactions and Equations</strong></p><ul><li>Define a chemical reaction.</li><li>Balance the following chemical equation: Fe + O? Fe? O? </li><li>Explain the term 'oxidation' with an example.</li></ul><p><strong>2. Acids, Bases, and Salts</strong></p><ul><li>What is the pH scale? </li><li>Describe the preparation of hydrogen chloride gas in the laboratory.</li><li>Explain the role of sodium hydroxide in the preparation of washing soda.</li></ul><p><strong>3. Metals and Non-metals</strong></p><ul><li>Differentiate between metals and non-metals based on their properties.</li><li>Write the chemical equation for the reaction of zinc with hydrochloric acid.</li><li>What is the process of galvanization? </li></ul><p><strong>4. Carbon and Its Compounds</strong></p><ul><li>What are homologous series? </li><li>Explain the formation of ethene from ethanol.</li><li>Write the chemical equation for the combustion of methane.</li></ul><p><strong>5. Periodic Classification of Elements</strong></p><ul><li>State Mendeleev's Periodic Law.</li><li>What are the limitations of Mendeleev's Periodic Table? </li><li>Explain the modern periodic law.</li></ul><p><strong>6. Life Processes</strong></p><ul><li>Describe the process of photosynthesis.</li><li>What is the role of the large intestine in the human digestive system? </li><li>Explain the process of transpiration in plants.</li></ul><p><strong>7. Control and Coordination</strong></p><ul><li>What is the role of the nervous system in humans? </li><li>Explain the structure and function of a neuron.</li><li>What is the difference between reflex action and voluntary action? </li></ul><p><strong>8. How Do Organisms Reproduce? </strong></p><ul><li>Define asexual reproduction.</li><li>Explain the process of binary fission in amoeba.</li><li>What is the significance of genetic variation in sexual reproduction? </li></ul><p><strong>9. Heredity and Evolution</strong></p><ul><li>What is Mendel's Law of Segregation? </li><li>Explain the concept of dominant and recessive traits.</li><li>What is the role of natural selection in evolution? </li></ul><p><strong>10. Light – Reflection and Refraction</strong></p><ul><li>State the laws of reflection.</li><li>What is the focal length of a concave mirror? </li><li>Explain the phenomenon of dispersion of light.</li></ul><p><strong>11. Human Eye and Colourful World</strong></p><ul><li>What is the power of accommodation in the human eye? </li><li>Explain the working of a compound microscope.</li><li>What is the cause of the blue colour of the sky? </li></ul><p><strong>12. Electricity</strong></p><ul><li>Define electric current.</li><li>What is Ohm's Law? </li><li>Calculate the resistance of a conductor using the formula R = V/I.</li></ul><p><strong>13. Magnetic Effects of Electric Current</strong></p><ul><li>What is the magnetic field? </li><li>Explain the working of an electric motor.</li><li>What is electromagnetic induction? </li></ul><p><strong>14. Sources of Energy</strong></p><ul><li>What are renewable and non-renewable sources of energy? </li><li>Explain the working of a hydroelectric power plant.</li><li>What is the environmental impact of burning fossil fuels? </li></ul><p><strong>15. Our Environment</strong></p><ul><li>What is the ozone layer? </li><li>Explain the concept of food chain and food web.</li><li>What are the causes and effects of deforestation? </li></ul><p><strong>16. Management of Natural Resources</strong></p><ul><li>What is sustainable development? </li><li>Explain the importance of water conservation.</li><li>What are the methods of waste management</li></ul><p>&nbsp;</p><p>Regular practice of these questions will enhance your understanding and boost your confidence for the exam.</p><p>Best regards, </p><p>Ankit</p></div></div>

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