CBSE Science sample paper class 10 2025 with solutions

Section A (20 MCQs | 1 Mark Each)

1. Chemical Reactions: Identify the type of reaction (e.g., decomposition, displacement).
2. Acids & Bases: pH value of a common household item (e.g., lemon juice).
3. Life Processes: Role of villi in the human digestive system.
4. Electricity: Equivalent resistance in a parallel circuit.
5. Heredity: Example of a sex-linked trait.
6. Environment: Primary consumer in a food chain.
7. Light: Lens power calculation (concave/convex).
8. Magnetic Effects: Direction of magnetic field using the Right-Hand Thumb Rule.
9. Periodic Table: Element with electronic configuration 2,8,3.
10. Carbon Compounds: Functional group in aldehydes.

(Topics: Chemical reactions, electricity, genetics, ecology, optics)

Section B (6 Questions | 2 Marks Each)

11. Chemistry: Write balanced equations for (a) Photosynthesis, (b) Rusting.
12. Biology: Differentiate between tropic and nastic movements.
13. Physics: Why does the sky appear blue? Explain with a diagram.
14. Biology: Draw a reflex arc and label its components.
15. Chemistry: Define homologous series with an example.
16. Environment: Role of decomposers in an ecosystem.

Section C (7 Questions | 3 Marks Each)

17. Physics: Calculate resistance in a series-parallel circuit (numerical).
18. Biology: Explain double fertilization in plants with a diagram.
19. Chemistry: Process of electrolysis in refining copper.
20. Physics: Image formation by a convex lens (ray diagram).
21. Biology: Mendel’s monohybrid cross (Punnett square).
22. Environment: Energy flow in a grassland ecosystem (pyramid).
23. Chemistry: Crystalline vs. amorphous carbon (uses of graphite/diamond).

Section D (3 Case Studies | 4 Marks Each)

24. Case 1 (Chemistry): Acid rain effects on marble structures (chemical reaction + mitigation).
25. Case 2 (Biology): Pedigree analysis for blood group inheritance (genotypes/phenotypes).
26. Case 3 (Physics): Solar cooker efficiency (principles, advantages over LPG).

Section E (3 Questions | 5 Marks Each)

27. Biology: Human respiratory system (pathway of air + alveoli diagram).
28. Physics: Electric motor working (Fleming’s Left-Hand Rule + labeled diagram).
29. Chemistry: Corrosion and rancidity (preventive measures with examples).

Key Focus Areas for 2025

1. Application-Based Learning: Numerical problems (resistance, lens formula), case studies on real-world issues.
2. Diagrams: Reflex arc, reproductive systems, electric circuits, ray diagrams.
3. Environment: Ozone depletion, sustainable practices (3Rs, solar energy).
4. NCERT Exemplar: Practice activity-based questions (e.g., pH testing, genetics experiments).

Preparation Tips:

• Revise NCERT textbooks thoroughly, especially highlighted activities and examples.
• Practice previous years’ papers and sample case studies.
• Focus on balancing equations, genetic crosses, and circuit diagrams.

Best of luck! 🌟

CBSE Science sample paper class 10 2025 with solutions

CBSE Class 10 Science Practice Paper 2025
Time: 3 Hours | Max Marks: 80
General Instructions:

1. This question paper consists of 39 questions in 5 sections.
2. Section A: 20 MCQs (1 mark each).
3. Section B: 6 Very Short Answer questions (2 marks each).
4. Section C: 7 Short Answer questions (3 marks each).
5. Section D: 3 Case-Based Questions (4 marks each).
6. Section E: 3 Long Answer questions (5 marks each).
7. All questions are compulsory.
8. Draw neat, labeled diagrams wherever required.
9. Use log tables and calculators not permitted.

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Section A (20×1=20 Marks)

Choose the correct option:

1. Chemical Reactions:
   Which reaction is an example of a combination reaction?
   (a) 2H2O→2H2+O22H2​O→2H2​+O2​
   (b) 2Mg+O2→2MgO2Mg+O2​→2MgO
   (c) Fe+CuSO4→FeSO4+CuFe+CuSO4​→FeSO4​+Cu
   (d) CaCO3→CaO+CO2CaCO3​→CaO+CO2​
2. Acids & Bases:
   The pH of a solution is 3. It is diluted by adding water. What will be its pH?
   (a) Remains 3
   (b) Increases
   (c) Decreases
   (d) First increases, then decreases
3. Life Processes:
   Which structure increases the surface area for absorption in the small intestine?
   (a) Alveoli
   (b) Nephron
   (c) Villi
   (d) Stomata
4. Electricity:
   The equivalent resistance of two 4Ω resistors in parallel is:
   (a) 8Ω
   (b) 2Ω
   (c) 4Ω
   (d) 16Ω

(Remaining MCQs cover topics like magnetic field direction, sex-linked disorders, ozone depletion, lens power, etc.)

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Section B (6×2=12 Marks)

11. Chemistry: Write balanced equations for:
    a) Burning of magnesium ribbon in air.
    b) Reaction of sodium hydroxide with hydrochloric acid.
12. Biology: Differentiate between aerobic and anaerobic respiration.
13. Physics: Why is a convex mirror used as a rear-view mirror?
14. Ecology: Define bioaccumulation and its impact on food chains.
15. Chemistry: What is a redox reaction? Give an example.
16. Biology: Name two hormones involved in regulating blood sugar levels.

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Section C (7×3=21 Marks)

17. Physics: Calculate the resistance of a wire if a 6V battery draws a current of 0.5A.
18. Biology: Explain the process of photosynthesis with a chemical equation and a labeled diagram of the chloroplast.
19. Chemistry: Describe the formation of ionic bonds using the example of sodium chloride.
20. Physics: Draw a ray diagram to show the image formed by a concave mirror when the object is placed at its center of curvature.
21. Biology: What is evolution? Explain Darwin’s theory of natural selection.
22. Environment: How do industries contribute to water pollution? Suggest three preventive measures.
23. Chemistry: Write three differences between diamond and graphite.

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Section D (3×4=12 Marks)

24. Case Study (Chemistry):
    A student tested two solutions X (pH=2) and Y (pH=6) with universal indicator.
    a) Which solution is acidic?
    b) What happens when solution X reacts with zinc metal?
    c) Suggest a natural indicator to test these solutions.
    d) How can solution Y be converted to a neutral solution?
25. Case Study (Biology):
    A farmer observed stunted growth in crops despite using fertilizers. Soil testing revealed low pH.
    a) What is this condition called?
    b) Suggest a chemical to treat the soil.
    c) Name two crops that can grow in acidic soil.
    d) How does soil pH affect nutrient availability?
26. Case Study (Physics):
    A household uses five 20W LED bulbs for 6 hours daily.
    a) Calculate the energy consumed in kWh in a day.
    b) Suggest two ways to reduce electricity consumption.
    c) Why are LED bulbs preferred over filament bulbs?

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Section E (3×5=15 Marks)

27. Biology:
    a) Draw a diagram of the human heart and label its four chambers.
    b) Explain the process of double circulation.
28. Physics:
    a) State Fleming’s Left-Hand Rule.
    b) Describe the working of an electric generator with a labeled diagram.
29. Chemistry:
    a) Write the chemical names and formulas of baking soda and washing soda.
    b) How is baking soda produced industrially?
    c) Mention two uses of washing soda.

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CBSE-Style Guidelines for Students

1. Read Instructions Carefully: Allocate time per section (e.g., 40 mins for Section A).
2. Clarity in Answers:
   • Use bullet points for 2/3-mark questions.
   • For 5-mark questions, write in paragraphs with subheadings.
3. Diagrams Matter: Use a pencil and ruler for diagrams. Label all parts clearly.
4. Keyword Focus: Highlight terms like oxidation, biodiversity, Ohm’s Law in answers.
5. Revise NCERT: 90% of questions are directly from NCERT textbooks and exemplars.
6. Case Studies: Read the passage twice. Answer sub-questions sequentially.
7. Time Management:
   • Sections A+B: 45 mins
   • Sections C+D: 60 mins
   • Section E: 30 mins
   • Revision: 15 mins

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Preparation Tips:

• Practice numericals on resistance, electricity, and light (lens/mirror formulas).
• Memorize chemical equations (photosynthesis, respiration, corrosion).
• Revise diagrams (heart, reflex arc, electric circuits).
• Solve sample case studies on environmental issues (e.g., Ganga pollution, ozone depletion).

Best of luck! 🌟
Stay calm, manage time wisely, and double-check your answers!

CBSE Class 10 Science 2025 Guess Paper Solutions