CBSE Class 10 2024-25 Science Most Repeated Questions PDF: Download Now

CBSE class 10 board exam is one the very important exams of student’s academic life. This is the junction of academic life from where students generally decide to move to different stream and field. CBSE has released the exam schedule and pattern for the Class 10 Science examination for the academic year 2024-2025. The CBSE class 10 exam is scheduled for February 15 to March 18, 2025. The CBSE class 10 science exam date is scheduled for February 20, 2025. CBSE class 10 sample paper has already been released by the board which will help students to practice the question and get familiar with the paper pattern and types of question.

New: CBSE Class 10 Date Sheet 2025 Out; Direct Link

CBSE 2025 Sample Papers: Science | Math-Basic | Math-Standard | Social Science

CBSE 2025 Sample Papers: English (Language & Literature) | English (Comm.) | Hindi-A | Hindi-B

This Story also Contains

1. CBSE Class 10 Science Exam Pattern 2025
2. Repeated Questions from CBSE Class 10 Science (2018-2023)
3. Important Formula for CBSE Class 10 Science Based on Repeated Questions
4. Preparation Strategy For CBSE Class 10 Science Exam

Many students wonder if questions from previous Class 10 Science exams are ever repeated. The answer is yes—some questions do reappear, and Careers360 provides a list of such repeated questions along with their respective years.

CBSE Class 10 Science Exam Pattern 2025

Before moving to the repeated question let’s first have a look at the exam pattern of CBSE class 10 science.

Section-wise Marks Distribution

Additional Information:

• Reading Time: 15 minutes before writing the exam.

• Marking Scheme: No negative marking; attempt all questions.

• Focus: Conceptual understanding and practical applications.

Repeated Questions from CBSE Class 10 Science (2018-2023)

MCQs

Q1. What is the formula for calculating the speed of an object?

A) Speed = Distance × Time

B) Speed = Distance / Time

C) Speed = Time / Distance

D) Speed = Distance + Time

[Years Appeared: 2019, 2022]

Q2. Which of the following is a non-metal that conducts electricity

A) Sulfur

B) Chlorine

C) Graphite

D) Nitrogen

[Years Appeared: 2020, 2021]

Q3. What is the SI unit of electric resistance?

A) Ampere

B) Volt

C) Ohm

D) Watt

[Years Appeared: 2021, 2023]

Q4. Which gas is released when zinc reacts with hydrochloric acid?

A) Oxygen

B) Nitrogen

C) Hydrogen

D) Carbon dioxide

[Years Appeared: 2019, 2020]

Q5. Which of the following is not a type of chemical bond?

A) Ionic Bond

B) Covalent Bond

C) Metallic Bond

D) Gravitational Bond

[Years Appeared: 2022, 2023]

Q6. What is Ohm’s Law?

A) V = IR

B) V = I²R

C) I = V/R

D) R = VI

[Years Appeared: 2020, 2021]

Q7. Which of the following is a unit of electric current?

A) Volt

B) Ampere

C) Ohm

D) Watt

[Years Appeared: 2021, 2023]

Q8. Which is not a type of chemical bond?

A) Ionic

B) Covalent

C) Metallic

D) Gravitational

[Years Appeared: 2022, 2023]

Q9. Which is not a type of chemical bond?

A) Ionic

B) Covalent

C) Metallic

D) Gravitational

[Years Appeared: 2022, 2023]

Q10. What is pH?

A) Hydrogen ion concentration

B) Measure of acidity or alkalinity

C) Both A & B

D) None of the above

[Years Appeared: 2019, 2022]

Q11. Which of the following is a method of asexual reproduction in plants?

A) Pollination

B) Budding

C) Fertilization

D) None of the above

[Years Appeared: 2020, 2023]

Q12. Which of the following is not a type of respiration?

A) Aerobic

B) Anaerobic

C) Fermentation

D) Both A and B

[Years Appeared: 2020, 2022]

Short Questions

Q1. Explain the process of photosynthesis. [Years Appeared: 2018, 2021]

Q2. State the laws of reflection. [Years Appeared: 2019, 2022]

Q3. Define the term 'molar mass'. How is it calculated?

[Years Appeared: 2020, 2023]

Q4. What are the properties of acids and bases?

[Years Appeared: 2018, 2020]

Q5. Explain the working of a simple electric motor.

[Years Appeared: 2021, 2022]

Q6. What is a chemical reaction? Explain with an example.

[Years Appeared: 2019, 2022]

Q7. Describe the process of electrolysis of water.

[Years Appeared: 2020, 2023]

Q8. What is the difference between acids and bases?

[Years Appeared: 2019, 2021]

Long Questions

Q1. Describe the structure of the human heart and explain its working.

[Years Appeared: 2019, 2022]

Q2. Discuss the factors affecting the rate of reaction.

[Years Appeared: 2018, 2021]

Q3. Explain the different types of reproduction in plants.

[Years Appeared: 2020, 2023]

Q4. Discuss the importance of the ozone layer and the effects of ozone depletion.

[Years Appeared: 2019, 2022]

Q5. Describe the process of respiration in plants and animals.

[Years Appeared: 2018, 2021]

Q6. Describe the structure and function of the human heart.

[Years Appeared:2018, 2022]

Q7. What is Mendel's law of inheritance? Explain with examples.

[Years Appeared:2020, 2023]

Q8. Explain the process of plant reproduction.

[Years Appeared: 2019, 2021]

Q9. What is a redox reaction? Explain with examples.

[Years Appeared: 2020, 2023]

Q10. Describe the periodic table and explain the trends in properties of elements.

[Years Appeared: 2019, 2022]

Q11. Explain the process of the carbon cycle.

[Years Appeared: 2020, 2021]

Case Studies

Q1. Case Study: A person is suffering from a deficiency of Vitamin D. What are the symptoms and how can this be treated?

[Years Appeared: 2019, 2022]

Q2. Case Study: A chemical reaction occurs when two substances are mixed and heat is released. Identify the type of reaction and explain.

[Years Appeared: 2020, 2023]

Q3. Case Study: A plant is placed in different light conditions, and its growth is observed. What are the factors affecting plant growth, and how does light influence it?

[Years Appeared: 2021, 2022]

Q4. Case Study: A person notices that his skin burns after prolonged exposure to the sun. Explain the science behind this and the role of UV rays.

[Years Appeared: 2018, 2023]

Q5. Case Study: A group of students conducts an experiment involving a burning candle inside a bell jar. What does this experiment demonstrate about the nature of combustion?

[Years Appeared: 2020, 2023]

Q6. Case Study: A student adds a few drops of hydrochloric acid to a metal. A gas is evolved, and the temperature of the solution increases. Identify the reaction and explain.

[Years Appeared: 2020, 2022]

Q7. Case Study: A farmer uses fertilizers and notices an increase in crop yield. Explain the role of fertilizers in plant growth.

[Years Appeared: 2019, 2021]

Important Formula for CBSE Class 10 Science Based on Repeated Questions

1. Speed = Distance / Time

2. Energy = Power × Time

3. Resistance (R) = Voltage (V) / Current (I)

4. Stress = Force / Area

5. Weight on Moon = Weight on Earth × (1/6)

6. Potential Energy = mgh (where m is mass, g is the acceleration due to gravity, and h is the height)

7. Voltage = Current × Resistance

8. Kinetic Energy = ½ mv²

9. Maximum Height (h) = (u²) / (2g), where u is the initial velocity and g is the acceleration due to gravity.

10. Acceleration (a) = (v - u) / t, where v is final velocity, u is initial velocity, and t is time.

11. Work = Force × Displacement (in the direction of the force)

12. Energy (in kWh) = Power (in kW) × Time (in hours)

Preparation Strategy For CBSE Class 10 Science Exam

• Analyze the CBSE Class 10 Science Syllabus 2024-25 and mark the important topics.

• Prepare the short notes for Important formulas, derivation, and relations.

• Solve numerical problems based on repeated topics.

• Always write Proper units in numerical and memorize the conversions.

• Practice diagram-based questions with proper labeling and description.

• Solve CBSE Class 10 previous year question papers to increase confidence and boost morale

• Prepare a proper strategic timetable and follow it throughout.

• Take breaks between studies for relaxation.