# Chapter 7 – Properties of Matter

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## Contents

Section 2:  (Exercise: Numericals)

Section 3:  (Extra: MCQ’s)

Section 4:  (Extra: Short Questions)

1. What is Kinetic molecular theory? Write down its postulates. (LHR 2013)
2. What is plasma? (GRW 2013)
3. What do you know about density? (LHR 2013)
4. Define pressure and write down its unit. (GRW 2014)
5. Define pressure in liquids.
6. State Pascal’s Law. (LHR 2015)
7. Explain the braking system of the vehicles.
8. State Archimedes Principle.                                 (LHR 2016)
9. Define principle of floatation
10. What is atmospheric pressure?
11. What is barometer?
12. Why mercury is used in barometer instead of water? (LHR 2014)
13. What weather changes can be expected due to decrease of atmospheric pressure?
14. What weather changes can be expected due to increase of atmospheric pressure?
15. What is Elasticity?
16. What is stress? (LHR 2016)
17. What is strain?
18. Hooke’s Law (LHR 2013)
19. Define Young’s Modulus.
20. What is elastic Limit? (GRW 2014)
21. What are the elastic materials? Give some examples.
22. How property of elasticity is used in our body?
23. Prove that the SI unit of Young’s modulus is Pascal or Nm-2.
24. Prove that liquid pressure does not depend upon mass of the liquids.
25. Under what condition the object floats in water?
26. Write any three applications of the Pascal’s law in our daily life.
27. When an inflated balloon is heated it bursts. Why?
28. Under what condition the object sinks in water?

Section 5:  (Extra: Long Questions)

1. Explain different states of matter on the basis of kinetic molecular theory.(LHR 2013)
2. What is atmospheric pressure? And explain atmospheric pressure with the help of an experiment.
3. Which device is used to measure the atmospheric pressure? Explain the measurement of atmospheric pressure by using barometer.
4. Write a note on variation in atmospheric pressure.
5. Define pressure in liquids. Derive its mathematical formula.
6. State Pascal’s Law. Write down the application of Pascal’s law.
7. Explain the braking system of the vehicles.
8. State and explain Archimedes Principle. (GRW 2015)
9. How density of an object can be found by Archimedes principle?
10. Explain the Principle of Floatation.
11. State and explain the Hooke’s Law.
12. Define Young’s Modulus and derive its mathematical formula.