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| Physics 9th Chapter 7 Properties of Matter Questions Bank |
Physics 9th Chapter 7 Properties of Matter Questions Bank MCQs
Choose the right answer
1. _____ tells about the floating and sinking of objects:
2. A solid object is:
3. According to Hooke’s law, within the elastic limit stress and strain has proportion:
4. According to Kinetic Molecular theory, gases exert pressure on the walls of the container due to their:
5. At sea level atmospheric pressure is:
6. Buoyant force is equal to the ----- of the liquid displaced by the object:
7. Due to pressure difference on an object, an upward force acts on the object known as:
8. How many states of mother are?
9. Hydraulic brake works on the principle of:
10. Hydraulic press is based on:
11. If a body is at a depth of `11' from the liquid surface of density `p', then the pressure on that body is:
12. If pressure is exerted on a liquid, liquid transmits it:
13. If quantity of the gas is increased in the container then gas pressure
14. In system international, the unit of stress is:
15. Ionic state of matter is called
16. Molecules of which state of matter have strongest attractive for
17. Plasma is
18. Pressure depends upon:
19. Submarine works on the principle of:
20. The energy possessed by the molecules of the matter due to its motion:
21. The force exerted perpendicularly on unit area of an object is called:
22. The force that acts on unit area of an object and thus changes its shape or size:
23. The instrument used to measure atmospheric pressure
24. The law about pressure on the object is presented by:
25. The law about stress and strain is presented by:
26. The molecules of the matter are always remain in the state of:
27. The object will float on the liquid surface when:
28. The object will sink in the liquid surface when:
29. The property of the matter due to which it restores its size and shape when force ceases to act on it:
30. The ratio of change in length to the original length is:
31. The ratio of tensile stress and tensile strain is:
32. The unit of pressure is:
33. The unit of Young's modulus is:
34. Unit of density
35. Unit of pressure is
36. Weakest attractive forces are in
37. What is young modulus of bone?
38. What is young modulus of brass?
39. What is young modulus of nickel?
40. What is young modulus of Rubber?
41. What is young modulus of Tungsten?
42. What is young modulus of wood (Parallel gain)?
43. When stress is increased, the strain also goes on:
44. When temperature of the gas increases, gas pressure:
45. When temperature of the matter increases, intermolecular forces
Short Questions
1. A small force applied on the smaller piston, results into a large force on the larger piston. Why?
2. Calculate the density of 5 litres of water?
3. Can we use a hydrometer to measure the density of milk?
4. Define deforming force.
5. Define density. Write its formula and unit?
6. Define Elasticity.
7. Define the term pressure write its formula and unit.
8. Define the term pressure.
9. Describe briefly about the matter?
10. Differentiate between stress and strain?
11. Does there exist a fourth state of matter? What is that?
12. Find density of 5 litre of water.
13. How is a syringe filled with a liquid?
14. How soap bubbles are produced. Why the soap bubbles so formed have spherical shapes?
15. How the kinetic molecular model of matter helps differentiate various states of matter?
16. Is an iron object heavier than that of wood?
17. It is easy to remove air from a balloon but it is very difficult to remove air from a glass bottle why?
18. On what factors pressure of the liquids depends?
19. Show that atmosphere exerts pressure.
20. State Pascal’s law.
21. What changes are expected in the weather if barometer reading shows a sudden increase?
22. What do you know about density of the Earth’s atmosphere?
23. What does it mean when the atmospheric pressure at a place falls suddenly?
24. What is a barometer?
25. What is meant by deforming force?
26. What is meant by density? What is its SI unit?
27. What is meant by elasticity?
28. What is strain?
29. What is stress?
30. What makes a sucker pressed on a smooth wall to it?
31. Why does a piece of the stone sink in water but a ship with huge weight floats?
32. Why does atmospheric pressure changes with altitude?
33. Why does the atmospheric pressure vary with height?
34. Why hydraulic press is called as force multiplier.
35. Why is 1cm cubed of wood lighter than 1 cm cubed of iron?
36. Why water is not suitable to be used as the barometer?
37. Write about the factors affecting pressure?
38. Write any three examples of pressure?
39. Write down the density equations?
40. Write factors effecting pressure:
41. Write some applications of Pascal’s law.
42. Write the procedure for measuring atmospheric pressure with the help of barometer?
Long Questions
1. How kinetic energy molecular model of matter helps differentiate various states of matter?
2. Show that atmosphere exerts pressure.
3. State Pascal’s law with applications
4. Explain the working of a hydraulic press.
5. State Archimedes Principle.
6. Explain how a submarine moves up the water surface and down into the water.
7. What is Hook’s law? What is meant by elastic limit?
8. Take a rubber band. Construct a balance of your own using a rubber band. Check its accuracy by weighing various objects.
9. State relation for pressure beneath a liquid surface to depth and density?
10. Prove that (P = ρgh)
11. Explain the working of a hydraulic press.
12. Explain the braking system in a vehicle?
13. State Archimedes principle.
14. Determine the density of an object using the Archimedes principle?
15. What is upthrust? Explain the principle of floatation.
16. Explain how a wooden block, ships and boats move up the water surface.
17. Explain how a submarine moves up the water surface down into the water.
18. What is Hook’s law? What is meant by elastic limit?
19. What do you know about Young’s modulus? How would you determine young’s modulus of an object?
20. A wooden block measuring 40 cm x 10 cm x 5 cm has a mass 850 g. Find the density of 3 wood.
21. How much would be the volume of ice formed by freezing 1 litre of water?
"22. Calculate the volume of the following objects:
(i) An iron sphere of mass 5 kg, the density of iron is 8200 kgm⁻³
(ii) 200 g of lead shot having density 11300 kgm⁻³
(iii) A gold bar of mass 0.2 kg. The density of gold is 19300 kgm⁻³"
23. The density of air is 1.3 kgm⁻³. Find the mass of air in a room measuring 8m x 5m x 4m.
24. A student presses her palm by her thumb with a force of 75 N. How much would be the pressure under her thumb having contact area 1.5 cm² ?
25. The head of a pin is a square of side 10 mm. Find the pressure on it due to a force of 20 N.
"26. A uniform rectangular block of wood 20 cm x 7.5 cm x 7.5 cm and of mass 1000g stands on a horizontal surface with its longest edge vertical. Find
(i) The pressure exerted by the block on the surface
(ii) Density of the wood."
27. A cube of glass of 5 cm side and mass 306 g, has a cavity inside it. If the density of glass is 2.55 gcm⁻³. Find the volume of the cavity.
28. An object has weight 18 N in air. Its weight is found to be 11.4 N when immersed in water. Calculate its density. Can you guess the material of the object?
29. A solid block of wood of density 0.6 gcm⁻³ weighs 3.06 N in air. Determine (a) volume of the block (b) the volume of the block immersed when placed freely in a liquid of density 0.9 gcm⁻³ ?
30. The diameter of the piston of a hydraulic press is 30 cm. How much force is required to lift a car weighing 20 000 N on its piston if the diameter of the piston of the pump is 3 cm?
31. A steel wire of cross-sectional area 2×m⁻⁵ m² is stretched through 2 mm by a force of 4000 N. Find the Young’s modulus of the wire. The length of the wire is 2 m.
32. What is atmospheric pressure? And explain atmospheric pressure with the help of an
33. Which device is used to measure the atmospheric pressure? Explain the measurement
34. Write a note on variation in atmospheric pressure.
35. State Pascal's Law. Write down the application of Pascal's law.
36. Explain the braking system of the vehicles.
37. State and explain Archimedes Principle.
38. How density of an object can be found by Archimedes principle?
39. Explain the Principle of Floatation.
40. State and explain the Hooke's Law.
41. Define Young's Modulus and derive its mathematical formula.