Preparing for the Class 10th Science exam can feel overwhelming with the vast syllabus and complex concepts. But with the right set of important questions and their detailed answers, you can boost your confidence and improve your performance significantly. In this article, we bring you a chapter-wise list of Class 10th Science important questions with answers to help you prepare efficiently for the board exams.
Whether you’re a CBSE student or from another state board, this curated list will help you revise the most frequently asked questions and understand how to write accurate answers to score full marks.
Table of Contents
- Chemical Reactions and Equations
- Acids, Bases and Salts
- Metals and Non-Metals
- Carbon and Its Compounds
- Life Processes
- Control and Coordination
- Electricity
- Magnetic Effects of Electric Current
- Sources of Energy
- Our Environment and Management of Natural Resources
1. Chemical Reactions and Equations
Important Question: Write the balanced chemical equation for the reaction of iron with copper sulfate solution. What type of reaction is this?
Answer:
Fe + CuSO4 → FeSO4 + Cu
This is a displacement reaction where a more reactive metal (iron) displaces a less reactive metal (copper) from its salt solution.
2. Acids, Bases and Salts
Important Question: What is the chemical formula of baking soda? How does it work in neutralizing acids?
Answer:
Baking soda’s chemical formula is NaHCO3. It reacts with acids to produce carbon dioxide gas, water, and a neutral salt. For example:
NaHCO3 + HCl → NaCl + CO2 + H2O
3. Metals and Non-Metals
Important Question: Why do ionic compounds have high melting and boiling points?
Answer:
Ionic compounds consist of positive and negative ions held together by strong electrostatic forces of attraction, which require a large amount of energy to break, hence their high melting and boiling points.
4. Carbon and Its Compounds
Important Question: What is the difference between saturated and unsaturated hydrocarbons?
Answer:
Saturated hydrocarbons contain single bonds between carbon atoms (e.g., alkanes like methane – CH4), while unsaturated hydrocarbons contain at least one double or triple bond (e.g., ethene – C2H4).
5. Life Processes
Important Question: Describe the process of photosynthesis with a balanced chemical equation.
Answer:
Photosynthesis is the process by which green plants make their food using sunlight, carbon dioxide, and water.
6CO2 + 6H2O + sunlight → C6H12O6 + 6O2
6. Control and Coordination
Important Question: Differentiate between reflex action and voluntary action.
Answer:
Reflex action is an automatic response to stimuli (e.g., pulling your hand back from a hot object), while voluntary action is controlled consciously by the brain (e.g., writing or talking).
7. Electricity
Important Question: What is Ohm’s Law? State its mathematical form and explain the terms.
Answer:
Ohm’s Law states that the current through a conductor is directly proportional to the voltage across it, provided temperature remains constant.
V = IR, where:
V = Voltage (Volts), I = Current (Amperes), R = Resistance (Ohms)
8. Magnetic Effects of Electric Current
Important Question: What is an electromagnet? How is it different from a permanent magnet?
Answer:
An electromagnet is a temporary magnet formed when current flows through a coil wrapped around a soft iron core. It can be switched on/off. A permanent magnet is always magnetic and cannot be controlled.
9. Sources of Energy
Important Question: Compare renewable and non-renewable sources of energy with examples.
Answer:
Renewable sources (like solar, wind) are naturally replenished and eco-friendly. Non-renewable sources (like coal, petroleum) are limited and cause pollution. Using renewable energy helps conserve nature and ensures sustainability.
10. Our Environment and Management of Natural Resources
Important Question: What are biodegradable and non-biodegradable substances? Give two examples each.
Answer:
Biodegradable substances decompose naturally (e.g., vegetable peels, paper), while non-biodegradable substances do not break down easily (e.g., plastic, glass). Proper waste management is crucial for environmental balance.
Bonus Tips to Score Full Marks in Class 10 Science
Apart from studying important questions and answers, students should also adopt smart study techniques. Here are some proven tips:
- Understand Concepts, Don’t Memorize: Science is logical. Understanding the ‘why’ and ‘how’ behind phenomena helps you write detailed answers with confidence.
- Draw and Label Diagrams: Questions from chapters like ‘Life Processes’ and ‘Electricity’ often include diagrams. A neatly labeled diagram can earn you extra marks.
- Revise Frequently: Science involves remembering formulas, equations, and scientific laws. Regular revision is the key to retaining these facts.
- Practice Sample Papers: Solve previous year question papers and mock tests to improve speed and accuracy.
- Focus on NCERT: 90% of Class 10 Science board questions are directly from NCERT. Don’t ignore the textbook.
FAQs: Class 10 Science Important Questions
Q1: Are NCERT questions enough for Class 10 Science?
Yes, NCERT is the base. Most board questions are directly based on NCERT concepts. However, practicing additional questions improves confidence and preparation.
Q2: How to write answers in the board exam to score full marks?
Write to the point, use diagrams, underline keywords, and follow proper formatting (like heading, subheading, etc.). Never leave a question blank.
Q3: Which chapters carry the most weight in the Science exam?
Chapters like ‘Electricity’, ‘Carbon and its Compounds’, ‘Life Processes’, and ‘Chemical Reactions’ are often high scoring and carry more weightage in the exam.
Effective Study Schedule for Class 10 Science Preparation
If you’re starting your revision late or want a crash course style plan, follow this 20-day schedule:
| Day | Chapter | Activity |
|---|---|---|
| Day 1-2 | Chemical Reactions | Read NCERT + Practice equations + Attempt 10 questions |
| Day 3-4 | Acids, Bases, and Salts | Concept revision + Practice reaction-based questions |
| Day 5 | Metals & Non-Metals | Understand reactivity series + Types of reactions |
| Day 6-7 | Carbon and Its Compounds | Chain structures + Functional groups + Naming |
| Day 8-9 | Life Processes | Focus on digestion, respiration, circulation, excretion |
| Day 10 | Control and Coordination | Revise hormonal actions and nervous system |
| Day 11-12 | Electricity | Ohm’s law, circuit diagrams, numericals |
| Day 13 | Magnetic Effects | Fleming’s rules + Electromagnetic induction |
| Day 14 | Sources of Energy | Conventional vs non-conventional energy sources |
| Day 15 | Our Environment | Biodegradable vs non-biodegradable substances |
| Day 16-20 | Mock Tests + Revision | Full syllabus revision + Solve 3 sample papers |
Motivation for Students: You Can Do It!
Sometimes, Science may seem tough — but remember, every topper once struggled just like you. What makes the difference is consistency and smart work. Even if you start now, you still have time to turn things around.
Believe in yourself. Keep distractions aside. Put your phone away. Focus on these Class 10 Science important questions and answers. Write answers by hand, revise them often, and stay positive.
Final Words
Success in Science doesn’t come from just reading. It comes from understanding, practicing, and testing yourself. Use the above top 10 important questions for Class 10 Science to revise quickly and prepare better.
We hope this article helped simplify your preparation. If you found it useful, don’t forget to bookmark this page and share it with your friends!