Time: 3 Hours 15 Minutes
Maximum Marks: 70
Instructions:
* The question paper consists of 38 questions divided into four sections: A, B, C, and D.
* Section A contains 10 multiple-choice questions (MCQ) of 1 mark each.
* Section B contains 10 very short answer questions (VSA) of 1 mark each.
* Section C contains 10 short answer questions (SA) of 2 marks each.
* Section D contains 8 long answer questions (LA) of 5 marks each.
* Internal choice is provided in Section D.
Section A (10 x 1 = 10 Marks)
Choose the correct answer from the given options:
1. The SI unit of electric current is:
a) Coulomb b) Ampere c) Volt d) Watt
2. The value of acceleration due to gravity is:
a) 9.8 m/s b) 9.8 m/s² c) 9.8 m/s³ d) 9.8 m/s⁴
3. The chemical formula of methane is:
a) CH2 b) CH4 c) C2H4 d) C2H6
4. Which of the following is a scalar quantity?
a) Displacement b) Velocity c) Acceleration d) Speed
5. The process of converting light energy into chemical energy is called:
a) Respiration b) Photosynthesis c) Digestion d) Excretion
6. The name of the functional group present in aldehydes is:
a) Ketone b) Aldehyde c) Carboxylic acid d) Amide
7. The atomic number of an element is determined by the number of:
a) Electrons b) Protons c) Neutrons d) Protons and neutrons
8. Which of the following is not a characteristic of a living organism?
a) Growth b) Reproduction c) Movement d) Inertia
9. The force of attraction between two objects due to their masses is called:
a) Gravitational force b) Electrostatic force c) Magnetic force d) Nuclear force
10. The SI unit of power is:
a) Joule b) Watt c) Newton d) Coulomb
Section B (10 x 1 = 10 Marks)
Answer the following in one sentence each:
11. Define electric potential.
12. What is the unit of work done?
13. Write the chemical formula of water.
14. What is meant by displacement?
15. What is the function of chlorophyll in photosynthesis?
16. What is the difference between an aldehyde and a ketone?
17. Define ionization energy.
18. What is the role of mitochondria in a cell?
19. State Newton's second law of motion.
20. What is the difference between speed and velocity?
Section C (10 x 2 = 20 Marks)
Answer the following in 2-3 sentences each:
21. Explain the difference between potential energy and kinetic energy.
22. Briefly explain the concept of Ohm's law.
23. Describe the structure of an atom.
24. What is the difference between a physical change and a chemical change? Give one example of each.
25. Explain the process of respiration in plants.
26. What are the different types of bonds present in organic compounds? Give one example of each.
27. Explain the difference between covalent and ionic bonding.
28. Describe the role of the nucleus in a cell.
29. What are the different types of forces acting on a body?
30. Calculate the work done by a force of 10 N acting on an object that moves a distance of 5 meters.
Section D (8 x 5 = 40 Marks)
Answer the following in detail (5 sentences each):
31. Explain the laws of reflection of light.
32. Describe the structure and functions of the human digestive system.
33. What are the different types of chemical reactions? Explain each type with an example.
34. Explain the concept of electric current and its properties.
35. Describe the process of photosynthesis in plants.
36. Derive the equation for kinetic energy.
37. What are the different types of motion? Explain each type with an example.
38. (a) What is the principle of conservation of momentum? Explain it with an example.
(b) What is the difference between a conductor and an insulator?
Note: This is just a sample question paper. The actual paper may vary in terms of difficulty, topics covered, and question patterns.