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| Chemistry 9th Chapter 5 Physical States of Matter Questions Bank |
Chapter 5 Physical States of Matter MCQs Questions Bank
Click the write option, green is correct and red color is wrong.
1. 1 atm pressure is equal to:
2. A tyre gets punctured is the example of:
3. Absolute temperature scale was introduced by:
4. According to Charles' law, volume and temperature vary:
5. Allotropes of oxygen are:
6. At 0 ⁰C the vapour pressure of diethyl ether is:
7. At 0 ⁰C the vapour pressure of ethyl alcohol is:
8. At freezing point which one of the following coexists in dynamic equilibrium:
9. At which temperature the volume of gas will be equal to zero?
10. Atomic radius of carbon in pm is:
11. Blood pressure of a healthy / normal person is:
12. Body temperature is measured in:
13. Boyle proposed his law in:
14. Density of aluminum is:
15. Density of gold is:
16. Density of iron is:
17. Density of liquid is expressed in:
18. Density of oxygen gas at 0 ⁰C:
19. Density of oxygen gas at 20 ⁰C:
20. Density of solids is expressed in:
21. Density of water is:
22. Example of amorphous solid is:
23. Freezing point of ethyl alcohol is:
24. Freezing point of water is:
25. Gases are the lightest form of matter and their densities are expressed in terms of:
26. How many states of matter exist?
27. How many times does hydrogen gas diffuse faster than oxygen gas?
28. How many times liquids are denser than gases?
29. In Charle’s Law k = ?
30. In hypertension, blood pressure is greater than:
31. In the evaporation process, liquid molecules which leave the surface of the liquid have:
32. In the evaporation process, liquid molecules which leave the surface of the liquid have:
33. In which state matter does not have definite shape and volume?
34. Liquids can be poured from one vessel to another due to:
35. Normal body temperature of humans is:
36. On what factors does the boiling point depend upon?
37. On which factor does evaporation depend?
38. One atmospheric pressure is equal to how many Pascal:
39. Pressure is a significant property of:
40. Rate of diffusion depends upon the:
41. Solid particles possess which one of the following motions?
42. The boiling point of acetic acid is:
43. The boiling point of alcohol is:
44. The boiling point of sodium chloride is:
45. The boiling point of water is:
46. The constant factor in Boyle’s law is:
47. The constant factor in Boyle’s law is:
48. The ease of flow of liquid depends upon the strength of:
49. The expression V ∞ T is the expression for _______ law.
50. The gaseous law that give the relationship between the volume and pressure is:
51. The Kelvin temperature scale was first suggested by the British scientist:
52. The mathematical expression that describes Boyle's law is:
53. The pressure exerted by the vapours of the liquid in equilibrium with the liquid at a given temperature is called:
54. The process of escape of molecules spontaneously from the surface of a liquid is called:
55. The process of moving of molecules from the vapour phase back into the liquid phase is called:
56. The S.I unit of pressure is:
57. The simplest form of matter is:
58. The temperature at which the volume of a gas theoretically becomes zero is:
59. The temperature at which two allotropic forms co-exist is called:
60. The vapour pressure of a liquid increases with the:
61. The volume of a given mass of a gas is inversely proportional to pressure when temperature is kept constant, this is called _______ law.
62. Vapour pressure of liquid depends upon the factors:
63. Vapour pressure of the liquid increases with increase in:
64. What must remain constant if Charles' law is to be applied to a given sample of a gas?
65. When the pressure of gas is increased from 1atm to 2atm, the volume of the gas reduces from 2 dm³ to:
66. When the pressure of gas is increased from 2atm to 4atm, the volume of the gas reduces from 1 dm³ to:
67. When the pressure of gas is increased from 2atm to 6atm, the volume of the gas reduces from 1dm³ to:
68. When the pressure of gas is increased from 2atm to 8atm, the volume of the gas reduces from 1dm³ to:
69. Which one is crystalline solid?
70. Which one is used to measure atmospheric pressure?
71. Which one is used to measure pressure in the laboratory?
72. Which one of the following does not affect the boiling point?
73. Which one of the following gas diffuses fastest?
74. Which one of the following is not amorphous?
75. Which state of matter has fixed shape and volume?
Short Questions
1. A gas occupies a volume of 800cm³ at 1 atm. What will be its pressure in mm of Hg, when it is allowed to expand up to 1200cm³?
2. Can you cool a gas by increasing its volume?
3. Convert 450 Kelvin into Celsius scale.
4. Convert 73 Celsius into Kelvin scale.
5. Define amorphous solids. Give examples.
6. Define boiling point.
7. Define Boyle’s law.
8. Define Charles’s law. Also write its mathematical representation.
9. Define crystalline solids. Give examples.
10. Define Effusion. On what factor does it depend?
11. Define evaporation.
12. Define freezing point
13. Define melting point. Describe melting of solids.
14. Define Pressure. Write down its SI unit.
15. Define standard atmospheric pressure. What are its units? How is it related to Pascal?
16. Define the term allotropy with examples.
17. Define transition temperature. Give examples.
18. Define vapour pressure.
19. Describe gaseous state of matter.
20. Describe the mobility of gas molecules.
21. Does Kelvin scale show a negative temperature?
22. Enlist the factors on which boiling point depends.
23. Enlist the factors on which vapour pressure depends.
24. Enlist the factors that affect evaporation.
25. Explain density of solid.
26. Explain evaporation causes cooling.
27. Explain the rigidity of solid.
28. Give the limitations of Arrhenius concept.
29. Give the mathematical expression for Charles’s law of gases.
30. Give the second statement of Boyle’s law.
31. How is evaporation affected by intermolecular forces of substance?
32. How is evaporation affected by surface area?
33. How the sizes of molecule affect vapour pressure?
34. How the temperature affect vapour pressure?
35. In which form does sulphur exist at 100 ⁰C?
36. Is the Boyle's law applicable to liquids?
37. Is the Boyle's law valid at very high temperature?
38. State Boyle’s law of gases.
39. State Charles law of gases and give its mathematical representation.
40. State whether allotropy is shown by elements or compounds or both?
41. Under which conditions is Boyle’s law applicable?
42. What are the factors affecting evaporation?
43. What do you mean by condensation?
44. What do you mean by evaporation? How is it affected by surface area?
45. What is absolute zero temperature?
46. What is absolute zero?
47. What is diffusion? Explain with an example.
48. What is meant by absolute zero?
49. What is normal body temperature?
50. What is the value of normal human blood pressure? Also give the value of blood pressure in hypertension,
51. What will happen if the pressure on a sample of gas is raised three times and its temperature is kept constant?
52. What will happen if the pressure on a sample of gas is raised three times and its temperature is kept constant?
53. When a gas is allowed to expand, what will be its effect on its temperature?
54. Which allotropic form of carbon is stable at room temperature (25 ⁰C)?
55. Which form of sulphur exists at room temperature?
56. Which is lighter one aluminium or gold?
57. Which variable(s) are kept constant in Charles’s law?
58. Which variables are kept constant in Charles's law?
59. Why amorphous solids do not have sharp melting points while crystalline solids do have?
60. Why are the gases compressible?
61. Why does evaporation increase with the increase of temperature?
62. Why does rate of diffusion increase with increase of temperature?
63. Why is the boiling point of water higher than that of alcohol?
64. Why is the melting point of a solid considered its 'identification' characteristic?
65. Why is vapour pressure higher at high temperature?
66. Why is white tin available at room temperature?
67. Why the density of a gas increases on cooling?
68. Why volume of a gas decreases with increase of pressure?
69. Write reasons for allotropy.
70. Write the molecular formula of a sulphur molecule?
Long Questions
1. A balloon that contains 1.6 dm³ of air at standard temperature (0 ⁰C) and (1atm) pressure is taken under water to a depth at which its pressure increases to 3.0 atm.
2. A gas at pressure 912 mm of Hg has volume 450 cm³ . What will be its volume at 0.4 atm
3. A gas occupies a volume of 35.0 dm³ at 17 ⁰C. If the gas temperature rises to 34oc at constant pressure, would you expect the volume to double? If not calculate the new volume.
4. A gas occupies a volume of 800 cm³ at 1 atm, when it is allowed to expand up to 1200 cm³ what will be its pressure in mm of Hg.
"5. A sample of gas is cooled at constant pressure from 30 ⁰C to 10 ⁰C. Comment:
a. Will the volume of the gas decrease to one third of its original volume?
b. If not, then by what ratio will the volume decrease?"
6. A sample of neon gas occupies a volume of 75.0 cm³ at very low pressure of 0.4 atm.
7. A sample of oxygen gas has a volume of 250 cm³ at - 30 ⁰C. If gas is allowed to expand up to 700 cm³ at constant pressure, find out its final temperature.
8. Assuming temperature remain constant what would be the volume at 1.0 atm. pressure?
"9. Convert the following units:
(a) 750 ⁰C to K (b) 150 ⁰C to K
(c) 100Kto ⁰C (d) 172K to ⁰C"
"10. Convert the following units:
(a) 850 mm Hg to atm (b) 205000 Pa to atm
(c) 560 torr to cm Hg (d) 1.25 atm to Pa"
11. Define and explain Charles' law of gases.
12. Define and explain Charles law.
13. Define boiling point and also explain, how it is affected by different factors.
14. Define boiling point? How it is affected by different factors?
15. Define Boyle's law and verify it with an example.
16. Define evaporation. Discuss the factors affecting on evaporation.
17. Define vapour pressure and explain different factors on which it depends.
18. Describe the phenomenon of diffusion in liquids along with factors which influence it.
19. Describe the solid state of matter and describe its various properties.
20. Differentiate between crystalline and amorphous solids.
21. Explain the amorphous and crystalline solids. Give at least two examples of each.
22. Explain the two types of solids.
23. It is desired to increase the volume of a fixed amount of gas from 87.5 to 118 cm³ while holding the pressure constant. What would be the final temperature if the initial temperature is 23 ⁰C.
24. State Boyle’s law and verify it with experiment.
25. Suppose that temperature remain unchanged, what would be the new volume of the balloon. Does it contract or expand?
26. The largest moon of Saturn, is Titan. It has atmospheric pressure of 1.6 x l05 Pa. What is the atmospheric pressure in atm? Is it higher than earth's atmospheric pressure?
27. What is vapour pressure and how it is affected by intermolecular forces?