Chemistry Class 9 Chapter 5 Important MCQs Federal Board

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

diffusion diagram

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

Difference between Diffusion and Effusion

3. Molecules of gases do not have any_____

A. Spaces

B. Molecules

C. Force of attraction

D. None of these

 Molecules of gases do not have any force of attraction - kmt

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

effusion diagram

ANSWER; A. do not


6. 1 atmospheric pressure is equal to____ torr.

A. 780

B. 990

C. 900

D. 760

1 torr = 1mm hg

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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