Here, we bring you a comprehensive collection of the most repeated questions for CBSE Class 10 Science. These questions are curated to help students understand the type of questions frequently asked in the CBSE Board Exams.
As students prepare for the CBSE Class 10 Science Board Exam in 2025, understanding the most repeated questions can significantly enhance their study strategy. These questions often cover key concepts from various chapters, including chemical reactions, electricity, and the human eye. By focusing on these frequently asked questions, students can gain confidence and improve their problem-solving skills.
Utilizing resources such as important question lists and practice papers will help reinforce their learning and ensure they are well-prepared for the exam. This approach not only helps in mastering the subject but also boosts the chances of achieving high marks in the upcoming board exams.
| CBSE Class 10 Science Exam Pattern 2025 | |
| Total Marks | 80 (Theory) + 20 (Internal Assessment) = 100 |
| Exam Duration | 3 hours |
| Sections | 5 Sections (A, B, C, D, E) |
| Question Types | MCQs, Very Short Answers, Short Answers, Long Answers, Case-based Questions |
| Internal Assessment | Periodic Tests, Practical Work, Portfolio |
| Section-wise Marks Distribution | ||||
| Section | Type of Questions | Number of Questions | Marks per Question | Total Marks |
| A | Multiple Choice Questions | 20 | 1 | 20 |
| B | Very Short Answer Questions | 6 | 2 | 12 |
| C | Short Answer Questions | 7 | 3 | 21 |
| D | Long Answer Questions | 3 | 5 | 15 |
| E | Case/Source-based Questions | 3 | 4 | 12 |
We have provided a comprehensive PDF containing the most repeated questions from CBSE Class 10 Science board exams. These questions are carefully selected to help students practice and focus on topics that have appeared frequently in previous years. By downloading this PDF, you can kickstart your preparation effectively and gain confidence in tackling important exam questions. Don't miss this chance—download the PDF now and give your preparation a boost!
Q1. Which of the following is an example of a non-renewable resource?
(a) Solar energy
(b) Wind energy
(c) Coal
(d) Biomass
Answer: (c) Coal
Q2. The process by which plants lose water vapor to the atmosphere is called:
(a) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Evaporation
Answer: (b) Transpiration
Q3. What type of mirror is commonly used in rear-view mirrors of vehicles?
(a) Concave mirror
(b) Convex mirror
(c) Plane mirror
(d) None of the above
Answer: (b) Convex mirror
Q4. In electrolysis, the substance that gets reduced is found at the:
(a) Anode
(b) Cathode
(c) Electrolyte
(d) None of the above
Answer: (b) Cathode
Q5. Which gas is released when an acid reacts with a metal?
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon dioxide
Answer: (a) Hydrogen
Q6. The formula for calculating resistance in a circuit is given by:
(a) R=V×I
(b) R=IV
© R=I×V
(d)R=VI
Answer: (b)
Q7. Which of the following statements about acids is true?
(a) They taste bitter.
(b) They turn blue litmus paper red.
(c) They are slippery to touch.
(d) They do not conduct electricity.
Answer: (b) They turn blue litmus paper red.
Q8. The pH of pure water at 25°C is:
(a) 0
(b) 7
(c) 14
(d) 10
Answer: (b) 7
Q9. What is the primary function of chlorophyll in plants?
(a) Absorb water
(b) Absorb sunlight for photosynthesis
(c) Store food
(d) Transport nutrients
Answer: (b) Absorb sunlight for photosynthesis.
Q10. Which type of reproduction involves two parents?
(a) Asexual reproduction
(b) Sexual reproduction
(c) Budding
(d) Fragmentation
Answer: (b) Sexual reproduction.
Q11. The force that opposes motion between two surfaces in contact is known as:
(a) Gravity
(b) Friction
(c) Tension
(d) Compression
Answer: (b) Friction.
Q12. In which specific part of a plant is photosynthesis mainly carried out?
(a) Roots
(b) Stems
(c) Leaves
(d) Flowers
Answer: (c) Leaves.
Q13. What type of energy transformation occurs in a hydroelectric power plant?
(a) Chemical to electrical energy
(b) Mechanical to electrical energy
(c) Thermal to mechanical energy
(d) Kinetic to potential energy
Answer: (b) Mechanical to electrical energy.
Q14. Which of the following is a characteristic of metals?
(a) They are good insulators.
(b) They are malleable and ductile.
(c) They have low melting points.
(d) They do not conduct electricity.
Answer: (b) They are malleable and ductile.
Q15. The basic unit of life is:
(a) Tissue
(b) Organism
(c) Cell
(d) Organ
Answer: (c) Cell.
Q16. Which process describes the movement of water from an area of high concentration to low concentration through a semi-permeable membrane?
(a) Diffusion
(b) Osmosis
(c) Filtration
(d) Active transport
Answer:(b ) Osmosis.
Q17. What is the main function of white blood cells in the human body?
(a) Carry oxygen
(b) Fight infections
(c) Clot blood
(d) Transport nutrients
Answer:( b ) Fight infections.
Q18. The chemical formula for glucose is:
(a) C6H12O6
(b) C12H22O11
(c) C6H6
(d) CH4
Answer:( a ) C6H12O6
Q19. Which type of bond involves the sharing of electron pairs between atoms?
(a) Ionic bond
(b) Covalent bond
(c) Metallic bond
(d) Hydrogen bond
Answer:( b ) Covalent bond
Q20. What is the primary gas produced during cellular respiration?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Hydrogen
Answer:( b ) Carbon dioxide
Q21.The process by which plants convert sunlight into chemical energy is called:
(a) Photosynthesis
(b) Respiration
(c) Transpiration
(d) Fermentation
Answer: (a) Photosynthesis
Q22. Which organelle is known as the powerhouse of the cell?
(a) Nucleus
(b) Ribosome
(c) Mitochondria
(d) Chloroplast
Answer: (c) Mitochondria
Q23. The main purpose of a fuse in an electrical circuit is to:
(a) Increase current flow
(b) Prevent overheating by breaking the circuit
(c) Store electrical energy
(d) Convert AC to DC
Answer: (b) Prevent overheating by breaking the circuit
Q24. Which wave property determines its pitch?
(a) Amplitude
(b) Wavelength
(c) Frequency
(d) Speed
Answer: (c) Frequency
Q25. What type of reaction occurs when an acid reacts with a base?
(a) Oxidation
(b) Reduction
(c) Neutralization
(d) Hydrolysis
Answer: (c) Neutralization
Q26. In which part of the human body does digestion begin?
(a) Stomach
(b) Esophagus
(c) Mouth
(d) Small intestine
Answer: (c) Mouth
Q27. Which type of mirror can produce virtual images only?
(a) Plane mirror
(b) Concave mirror
(c) Convex mirror
(d) None of the above
Answer: (c) Convex mirror
Q28. What phenomenon explains why we see colors in objects?
(a) Refraction and dispersion
(b) Reflection and absorption
(c) Diffraction and interference
(d) Transmission and scattering
Answer: (b) Reflection and absorption
Q29. The main structural component of plant cell walls is:
(a) Starch
(b) Cellulose
(c) Glycogen
(d) Chitin
Answer: (b) Cellulose
Q30. Which gas is essential for combustion to occur?
(a) Nitrogen
(b) Hydrogen
(c) Oxygen
(d) Carbon dioxide
Answer: (c) Oxygen
Also Check:
Commonly repeated topics in CBSE Class 10 Science board exams include Chemical Reactions and Equations, Acids, Bases, and Salts, Life Processes, Control and Coordination, and Heredity and Evolution. These topics are vital as they encompass fundamental concepts in Physics, Chemistry, and Biology, making them essential for exam preparation.
Focusing on repeated topics in Class 10 Science is crucial for several reasons. First, these topics often represent fundamental concepts that are essential for understanding the subject as a whole. By concentrating on frequently asked questions, students can reinforce their knowledge and improve retention, leading to better performance in exams.
There are identifiable patterns in repeated questions from past CBSE Science papers. Typically, questions revolve around key chapters such as Chemical Reactions and Equations, Acids, Bases, and Salts, and Electricity. Moreover, questions often test students on definitions, formulas, and diagrams from these chapters. While the exact wording may change, the underlying concepts remain consistent, allowing students to prepare effectively by practicing similar types of questions.
By focusing on these repeated topics and understanding the patterns in question formats, students can enhance their exam readiness and increase their chances of achieving high scores.
Yes, questions from previous CBSE Class 10 exams are often repeated or rephrased in board papers. This trend highlights the importance of reviewing past exam papers to familiarize oneself with the types of questions that may appear in future exams. Practicing these questions can significantly enhance students' preparedness.
The chapter on Control and Coordination is often regarded as one of the most challenging topics in CBSE Class 10 Science due to its complex concepts related to the nervous system and hormonal control in organisms. Students may find it difficult to grasp the intricate details of neural pathways and physiological processes involved.
These answers provide concise and clear insights into common queries regarding the CBSE Class 10 Science curriculum and examination patterns.