CBSE Class 10 Science Most Repeated Questions for 2025 Board Exam

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

Section Wise Marks Distribution

CBSE Class 10 Science Most Repeated Questions PDF

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!

CBSE Class 10 Science Most Repeated Questions PDF

CBSE Class 10 Science Most Repeated Questions for 2025 Board Exam

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: 

• NCERT Solutions for Class 10 Science
• Class 10 Science MCQs
• NCERT Books for Class 10
• CBSE Class 10 Previous Year Question Papers
• CBSE Sample Paper for Class 10

Why Are CBSE Class 10 Repeated Questions Important?

1. Boost Confidence in Preparation: Repeated questions in CBSE Class 10 exams help students identify patterns, allowing them to focus on high-probability questions and build confidence.
2. Understand Key Topics: Repeated questions often come from important topics that are consistently emphasized in the Class 10 science syllabus, helping students prioritize their preparation effectively.
3. Efficient Time Management: Practicing repeated questions improves familiarity with Class 10 exam patterns, enabling students to solve them more quickly and manage time better during exams.
4. Strengthen Core Concepts: Questions that are repeated often test fundamental concepts. Revisiting these helps students build a strong foundation in subjects like Math, Science, and Social Science.
5. Improve Exam Accuracy: Familiarity with frequently asked questions reduces errors and improves overall accuracy, leading to higher CBSE board exam scores.
6. Focus on Scoring Areas: Repeated questions often fall under high-weightage sections of the syllabus. Preparing them ensures better performance in critical areas of the exam.
7. Simplify Revision: Reviewing repeated questions during revision helps in reinforcing important concepts and identifying gaps in understanding.
8. Predict Trends in Exams: Observing patterns in repeated questions can help students predict potential topics and focus their preparation on likely exam questions.
9. Enhance Preparation Strategy: Solving repeated questions teaches students to plan a targeted study approach, focusing on questions that are most likely to appear in the exam.