Chemistry Class 9 Chapter 5 Important MCQs Federal Board 2023
Chapter 5 Chemistry Class 9 fbise 2023
Physical States of Matter mcqs
1. The intermixing of _____ gases is known as diffusion.
A. Reacting
B . Non Reacting
C. Noble
D. Both A and C
ANSWER: B . Non reacting
2. In diffusion the movement of particles is towards_____concentration.
A. Lower
B. Higher
C. Same
D. All concentration
ANSWER: A. Lower
3. Molecules of gases do not have any_____
A. Spaces
B. Molecules
C. Force of attraction
D. None of these
ANSWER: C. Force of attraction
4. Effusion is the leaking of gas through a_____ hole.
A. Pin
B. molar
C. Large
D. Black
ANSWER: A. Pin
5. In effusion gas molecules____ collide with each other.
A. do not
B. always
C. Escape
D. None of the above
ANSWER; A. do not
6. 1 atmospheric pressure is equal to____ torr.
A. 780
B. 990
C. 900
D. 760
ANSWER: D. 760
7. 760 torr is equal to____ mm of Hg
A. 780
B. 760
C. 900
D. 190
ANSWER: B. 760
8. A gas exerts pressure on____ of the container.
A. Boundaries
B. Walls
C. Piston
D. All of these
ANSWER: B. Walls
9. ____ per unit area is known as pressure.
A. Strain
B. Stress
C. Force
D. None of these
ANSWER: C. Force
10. 1 atm = ____ kPa
A. 110
B. 220
C. 574
D. 101.325
ANSWER: D. 101.325
11. The system International unit of Pressure is _____.
A. Pascal
B. Newton
C. Curie
D. Debye
ANSWER: A. Pascal
12. Gases are____ compressible.
A. Highly
B. Not
C. Lightly
D. Easily
ANSWER: A. Highly
13. By applying pressure distances between gas molecules _____.
A. Remain same
B. Increases
C. Decreases
D. None of these
ANSWER: C. Decreases
14. On applying pressure gas volume _____.
A. Increases
B. Decreases
C. Remain same
D. None of these
ANSWER : B. Decreases
15. Mass divided by____ is known as density.
A. Pressure
B. Force
C. Molar mass
D. Volume
ANSWER: D. Volume
16. When a gas is cooled its density _____
A. Increases
B. Decreases
C. Remain same
D. None of these
ANSWER: A. Increases
17. According to KMT gas molecules are in constant random _____.
A. Vibration
B. Transition
C. Motion
D. All of these
ANSWER: C. Motion
18. The absolute temperature is measured in _____.
A. Kelvin
B. Celsius
C. Fahrenheit
D. All of these
ANSWER: A. Kelvin
19. There are____ empty spaces between molecules of a gas.
A. No
B. Small
C. Negligible
D. Large
ANSWER: D. Large
20. Increase in temperature causes_____ in energy of gas molecules.
A. Increase
B. Decrease
C. Remain same
D. All of these
ANSWER: A. Increase
21. Boyle’s law is applicable only at_____ temperature
A. Variable
B. Constant
C. Both
D. None
ANSWER: B. Constant
22. The relation between pressure and volume is given by _____ law.
A. Charles
B. Both A and C
C. Avogadro’s
D. Boyle’s
ANSWER: D. Boyle’s
23. Pressure varies___ with volume for gases.
A. Directly
B. Inversely
C. Both
D. None
ANSWER: B. Inversely
24.____ is used as an anesthetic gas
A. Methane
B. Ethane
C. Propane
D. Butane
ANSWER: B. Ethane
25. The relation between temperature and volume is given by _____ law.
A. Charle’s
B. Boyle
C. Avogadro
D. All of these
ANSWER: A. Charle’s
26. Gay-Lussac law is the other name of _____ law.
A. Newton
B. Boyles
C. Charles
D. Avogadro
ANSWER: C. Charles
27. In Charle’s law ___ is a constant quantity.
A. Temperature
B. Volume
C. Both B and C
D. Pressure
ANSWER: D. Pressure
28.____ gas is used as a refrigerant.
A. Ammonia
B. Chloroform
C. Ethane
D. Acetone
ANSWER: A. Ammonia
29. The temperature of gas varies____ with its volume.
A. Remain same
B. Inversely
C. Directly
D. None
ANSWER: C. Directly
30. Evaporation occurs at ____ temperature.
A. Specific
B. All
C. 100 C
D. None
ANSWER: B. All
31. The interchange of liquid into vapours is known as ____.
A. Condensation
B. Evaporation
C. Both
D. None
ANSWER: B. Evaporation
31. Evaporation is a ___ phenomenon.
A. Space
B. Air
C. Surface
D. All
ANSWER: C. Surface
32. Evaporation is a ______ process
A. Heating
B. Cooling
C. Fictional
D. None
ANSWER : B. Cooling
33. Vapour pressure varies ____ with temperature.
A. Directly
B. Inversely
C. Remain same
D. None
ANSWER: A. Directly
34. The pressure exerted by vapours upon ______ at equilibrium is known as vapour pressure.
A. Plasma
B. Solid
C. Gas
D. Liquid
ANSWER: D. Liquid
35. The temperature at which vapour pressure becomes equal to atmospheric pressure is ____ point.
A. Melting
B. Boiling
C. Freezing
D. All
ANSWER: B. Boiling
36. The boiling point of water is ___ 0C
A. 45
B. 100
C. 73
D. 95
ANSWER: B.100
37. Boiling point of water at Mount Everest is ___ 0c
A. 80
B. 76
C.55
D. 70
ANSWER: D. 70
38. Melting and freezing points of a solid are ___.
A. Different
B. Imaginary
C. Same
D. None
ANSWER: C. Same
39. Conversion of a solid into vapours directly is known as _____.
A. Condensation
B. Evaporation
C. Sublimation
D. None
ANSWER: C. Sublimation
40. Melting point of NaCl is ___ 0C
A. 400
B. 801
C. 342
D. 555
ANSWER: B. 801
41. Regular 3d structure is present in ____ solids.
A. Crystalline
B. Amorphous
C. Both
D. None
ANSWER: A. Crystalline
42. The solids which lack ordered arrangements are ____ solids
A. Crystalline
B. Amorphous
C. Both
D. None
ANSWER: B. Amorphous
43. Glass is an example of ____ solids.
A. Crystalline
B. Amorphous
C. Both
D. None
ANSWER: B. Amorphous
44. The different forms of the element in the same physical form are known as ____.
A. Allotropes
B. Isotopes
C. Both
D. None
ANSWER: A. Allotropes
45. Carbon exists in ___ allotropic forms.
A. 6
B. 4
C. 5
D. 3
ANSWER: D. 3
9th Class Chemistry Chapter 5 Important Questions
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