Class 9 Science Test Paper
Total Marks: 60 | Time: 2 Hours
Section A: Objective Type Questions (1 mark each)
1. Which state of matter has a definite shape and volume? (1 mark)
2. What is the process of converting a solid directly into gas called? (1 mark)
3. Name the technique used to separate a mixture of two immiscible liquids. (1 mark)
4. Who proposed the 'plum pudding' model of the atom? (1 mark)
5. What is the charge of a neutron? (1 mark)
6. Define sublimation. (1 mark)
7. What is the SI unit of temperature? (1 mark)
8. Give one example of a colloid. (1 mark)
9. What are the fundamental particles of an atom? (1 mark)
10. Define atomic number. (1 mark)
Section B: Short Answer Questions (3 marks each)
11. Explain the term 'latent heat of fusion' with an example. (3 marks)
12. Differentiate between homogeneous and heterogeneous mixtures with examples. (3 marks)
13. State the postulates of Dalton's atomic theory. (3 marks)
14. Describe Rutherford's gold foil experiment and its conclusions. (3 marks)
15. Define isotopes and give two examples. (3 marks)
16. Why do gases exert pressure on the walls of a container? (3 marks)
17. List three differences between compounds and mixtures. (3 marks)
18. What is the Tyndall effect? Give two examples. (3 marks)
19. Explain the significance of the law of conservation of mass with an example. (3 marks)
20. Why does temperature remain constant during a phase change? (3 marks)
Section C: Long Answer Questions (5 marks each)
21. Discuss the factors affecting the rate of evaporation. (5 marks)
22. Explain the process of crystallization and its applications. (5 marks)
23. Describe Bohr's model of the atom and its limitations. (5 marks)
24. Explain the different types of colloids with suitable examples. (5 marks)
25. Write a detailed note on the separation of mixtures, explaining different methods with examples. (5 marks)
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