Class 10 Science
Previous Board Examination Question Paper – Set 3
Time: 3 Hours Maximum Marks: 80
General Instructions:
- All questions are compulsory.
- The question paper consists of Sections A, B, C, D and E.
- Use of calculator is not permitted.
- Draw neat and labelled diagrams wherever required.
Section A – MCQs
(1 × 20 = 20 Marks)
1. Which substance is used as a refrigerant in refrigerators?
a) Oxygen b) Ammonia c) Nitrogen d) Carbon dioxide
2. The site of photosynthesis in a plant cell is:
a) Nucleus b) Chloroplast c) Mitochondria d) Ribosome
3. The SI unit of resistance is:
a) Ampere b) Volt c) Ohm d) Watt
4. Which metal is liquid at room temperature?
a) Iron b) Mercury c) Copper d) Aluminium
5. The image formed by a concave mirror when the object is at focus is:
a) Real and inverted b) Virtual and erect c) Highly diminished d) At infinity
6. Which blood group is universal donor?
a) A b) B c) AB d) O
7. Which gas is responsible for global warming?
a) Oxygen b) Nitrogen c) Carbon dioxide d) Hydrogen
8. The energy stored in a stretched spring is:
a) Heat energy b) Kinetic energy c) Potential energy d) Chemical energy
9. Which part of the ear maintains balance?
a) Cochlea b) Ear drum c) Semicircular canals d) Auditory nerve
10. The pH value of an acidic solution is:
a) More than 7 b) Equal to 7 c) Less than 7 d) Equal to 14
Section B – Very Short Answer
(2 × 5 = 10 Marks)
11. Define chlorophyll.
12. Write the chemical formula of quick lime.
13. Define electric resistance.
14. What is pollination?
15. Name the hormone that controls growth in humans.
Section C – Short Answer
(3 × 6 = 18 Marks)
16. Explain the process of digestion in human beings.
17. Write three uses of acids.
18. State Joule’s law of heating.
19. Describe the structure of lungs with diagram.
20. Explain refraction of light with example.
21. What is biodegradable waste? Why is it important?
Section D – Long Answer
(5 × 4 = 20 Marks)
22. Explain nutrition in human beings.
23. Describe sexual reproduction in plants.
24. Derive the formula for electric power.
25. Explain the working of a concave mirror with ray diagram.
Section E – Case Study Based Questions
(4 × 3 = 12 Marks)
26. A student observed that milk turns sour when kept outside.
a) Which type of change is this?
b) Name the acid formed.
c) State one method to prevent this change.
Shaktimatha CBSE Learning
Class 10 Science – Previous Board Exam Question Paper (Set 3)
⬅️ Back to Class 10 Science Library
🔬 Class 10 Science – Previous Board Question Papers & Full Answers
This complete library is designed for Class 10 CBSE students to practise previous board exam papers and learn how to write perfect answers in Physics, Chemistry, and Biology.
📝 Previous Board Question Papers
- Question Paper – Set 1
- Question Paper – Set 2
- Question Paper – Set 3
- Question Paper – Set 4
- Question Paper – Set 5
✍️ Full Answers (Student Writing Style)
- Full Answers – Set 1
- Full Answers – Set 2
- Full Answers – Set 3
- Full Answers – Set 4
- Full Answers – Set 5
📚 Additional Board Sets (Practice)
- Additional Question Paper – Set 1A
- Additional Full Answers – Set 1A
- Additional Question Paper – Set 2A
- Additional Full Answers – Set 2A
- Additional Question Paper – Set 3A
- Additional Full Answers – Set 3A
✔ First attempt the question paper on your own
✔ Then compare with full answers
✔ Observe diagrams, keywords, and steps
✔ Practise again to improve speed and accuracy
Prepared with dedication by Shaktimatha Learning ✨
Clear concepts • Exam confidence • Board success
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