Science Class 10: Chapterwise Previous Year Questions

Science is a fascinating subject that encompasses various concepts and principles that help us understand the world around us. Class 10 Science is an important milestone in a student's academic journey, as it lays the foundation for higher-level concepts in the subject. To excel in this subject, it is crucial to practice previous year questions, as they provide an insight into the exam pattern and help in revision. In this document, we will discuss chapterwise previous year questions related to Science Class 10.

1. Chapter 1: Chemical Reactions and Equations
- Explain the law of conservation of mass.
- Write the balanced chemical equation for the following reaction: Magnesium + Oxygen → Magnesium Oxide.

2. Chapter 2: Acids, Bases, and Salts
- Define pH scale and its significance.
- Write the chemical equation for the reaction between hydrochloric acid and sodium hydroxide.

3. Chapter 3: Metals and Non-Metals
- Differentiate between metals and non-metals based on their physical properties.
- Explain the process of corrosion and its prevention.

4. Chapter 4: Carbon and Its Compounds
- Define organic compounds and give examples.
- Write the structural formula of ethanol and ethanoic acid.

5. Chapter 5: Periodic Classification of Elements
- Define valency and its significance in the periodic table.
- Write the electronic configuration of the element with atomic number 17.

6. Chapter 6: Life Processes
- Explain the process of respiration in plants and animals.
- Differentiate between autotrophic and heterotrophic nutrition.

7. Chapter 7: Control and Coordination
- Define reflex action and give an example.
- Explain the role of hormones in our body.

8. Chapter 8: How do Organisms Reproduce?
- Explain the process of sexual reproduction in flowering plants.
- Differentiate between asexual and sexual reproduction.

9. Chapter 9: Heredity and Evolution
- Define acquired and inherited traits.
- Explain the process of natural selection proposed by Charles Darwin.

10. Chapter 10: Light - Reflection and Refraction
- Define the terms 'incident ray,' 'reflected ray,' and 'normal.'
- Explain the phenomenon of total internal reflection.

These are some of the chapterwise previous year questions related to Science Class 10. By practicing these questions, students can enhance their understanding of the concepts and improve their performance in examinations. Remember to refer to your textbook and class notes for detailed explanations and additional examples.