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Class 9 Science - Chapter : Motion 50. MCQs

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Class 9 Science – Chapter: Motion 50. MCQs  1. An object is thrown vertically upwards. Its acceleration at the highest point is: A) 0 m/s² B) 9.8 m/s² downward C) 9.8 m/s² upward D) Cannot be determined 2. Which of the following remains constant in uniform circular motion? A) Velocity B) Acceleration C) Speed D) Displacement 3. A car moves with velocity for time and covers distance . Which is correct? A)  B)  C)  D)  4. If an object returns to its starting point after a journey, its displacement is: A) Zero B) Equal to total distance C) Infinite D) None of these 5. The SI unit of displacement is: A) m/s B) m/s² C) metre D) second 6. Which graph represents an object at rest? A) Curved s-t graph B) Straight s-t line parallel to time axis C) Sloped s-t line D) None of these 7. A train travels 30 km at 20 km/h and next 70 km at 70 km/h. The average speed is closest to: A) 40 km/h B) 50 km/h C) 60 km/h D) 70 km/h 8. When velocity and acceleration have opposite sign...
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"Top 50 Tough and Easy MCQs from Class 9 Science Chapter 'Matter in Our Surroundings' – Best Practice Questions with Answers"

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"Top 50 Tough and Easy MCQs from Class 9 Science Chapter 'Matter in Our Surroundings' – Best Practice Questions with Answers"



1-10: Basic Concepts


1. Which of the following is matter?

A) Light

B) Heat

C) Air

D) Sound

Ans: C) Air


2. The smell of hot sizzling food reaches you several meters away due to:

A) Conduction

B) Convection

C) Radiation

D) Diffusion

Ans: D) Diffusion


3. Which one of the following has the highest density?

A) Solid

B) Liquid

C) Gas

D) Plasma

Ans: A) Solid


4. The rate of diffusion is fastest in:

A) Solids

B) Liquids

C) Gases

D) Plasma

Ans: C) Gases


5. Which of the following is not a characteristic of particles of matter?

A) They are continuous

B) They attract each other

C) They have spaces between them

D) They are always in motion

Ans: A) They are continuous


6. In which of the following states of matter are particles tightly packed?

A) Solid

B) Liquid

C) Gas

D) Plasma

Ans: A) Solid


7. The smell of perfume spreads due to:

A) Osmosis

B) Sublimation

C) Diffusion

D) Evaporation

Ans: C) Diffusion


8. Which of the following shows the property of taking the shape of the container?

A) Solid

B) Liquid

C) Both A and B

D) None

Ans: B) Liquid


9. Which state of matter has no fixed shape and no fixed volume?

A) Solid

B) Liquid

C) Gas

D) Plasma

Ans: C) Gas


10. When a solid melts, it changes to:

A) Gas

B) Plasma

C) Liquid

D) None

Ans: C) Liquid


11-20: Change of State


11. The process of change from liquid to gas is called:

A) Melting

B) Condensation

C) Evaporation

D) Freezing

Ans: C) Evaporation


12. Boiling is:

A) A surface phenomenon

B) A bulk phenomenon

C) A chemical change

D) None

Ans: B) A bulk phenomenon


13. Latent heat of vaporisation is the heat required to:

A) Raise temperature

B) Convert liquid to gas without temperature change

C) Boil the liquid

D) None

Ans: B) Convert liquid to gas without temperature change


14. Which of the following can change directly from solid to gas?

A) Ice

B) Camphor

C) Water

D) Alcohol

Ans: B) Camphor


15. Sublimation is the process in which:

A) Liquid turns into gas

B) Solid turns directly into gas

C) Gas turns into liquid

D) None

Ans: B) Solid turns directly into gas


16. Which factor does not affect the rate of evaporation?

A) Temperature

B) Wind speed

C) Surface area

D) Shape of container

Ans: D) Shape of container


17. The temperature at which a liquid starts boiling is called:

A) Boiling point

B) Melting point

C) Condensation point

D) Evaporation point

Ans: A) Boiling point


18. At high altitude, water boils at:

A) 100°C

B) More than 100°C

C) Less than 100°C

D) 0°C

Ans: C) Less than 100°C


19. On increasing pressure, a gas can be liquefied. This principle is used in:

A) Cooking

B) Fire extinguisher

C) LPG cylinder

D) Water cooler

Ans: C) LPG cylinder


20. Melting of ice is an example of:

A) Physical change

B) Chemical change

C) Both

D) None

Ans: A) Physical change


21-30: Evaporation & Latent Heat


21. Sweating cools the body because of:

A) Condensation

B) Boiling

C) Evaporation

D) Radiation

Ans: C) Evaporation


22. Latent heat of fusion of ice is:

A) 80 cal/g

B) 100 cal/g

C) 540 cal/g

D) 10 cal/g

Ans: A) 80 cal/g


23. Which of the following increases evaporation?

A) Increase in humidity

B) Decrease in temperature

C) Increase in surface area

D) Less wind

Ans: C) Increase in surface area


24. Drying of clothes is faster on a windy day due to:

A) Less humidity

B) Faster evaporation

C) Increased temperature

D) None

Ans: B) Faster evaporation


25. Which of the following will evaporate faster?

A) Water in a glass

B) Water in a bowl

C) Water in a plate

D) All will be same

Ans: C) Water in a plate


26. Evaporation is a:

A) Bulk phenomenon

B) Surface phenomenon

C) Chemical change

D) None

Ans: B) Surface phenomenon


27. The energy supplied during change of state is used to:

A) Increase temperature

B) Break interparticle forces

C) Create new matter

D) None

Ans: B) Break interparticle forces


28. The process of gas changing into liquid is:

A) Melting

B) Boiling

C) Condensation

D) Fusion

Ans: C) Condensation


29. Which of the following is not a state of matter?

A) Solid

B) Liquid

C) Gas

D) Energy

Ans: D) Energy


30. Particles of matter are always:

A) At rest

B) Vibrating

C) Stationary

D) Breaking

Ans: B) Vibrating


31–40: Advanced Understanding


31. The inter-particle space is maximum in:

A) Solids

B) Liquids

C) Gases

D) Plasma

Ans: C) Gases


32. Kinetic energy of particles increases with:

A) Decrease in temperature

B) Increase in pressure

C) Increase in temperature

D) All of the above

Ans: C) Increase in temperature


33. A gas can be liquefied by:

A) Increasing pressure only

B) Decreasing temperature only

C) Both A and B

D) Neither A nor B

Ans: C) Both A and B


34. Which of the following shows least compressibility?

A) Water

B) Air

C) Steel

D) Oxygen

Ans: C) Steel


35. When ice melts, it absorbs heat but does not show an increase in temperature. This heat is called:

A) Latent heat of vaporisation

B) Latent heat of fusion

C) Specific heat

D) Melting point

Ans: B) Latent heat of fusion


36. Which change of state releases energy?

A) Melting

B) Vaporisation

C) Condensation

D) Sublimation

Ans: C) Condensation


37. Fog is an example of:

A) Solid in gas

B) Liquid in gas

C) Gas in liquid

D) Gas in solid

Ans: B) Liquid in gas


38. Dry ice is the solid form of:

A) Nitrogen

B) Oxygen

C) Carbon dioxide

D) Hydrogen

Ans: C) Carbon dioxide


39. Which state of matter does not have a fixed volume or shape?

A) Liquid

B) Solid

C) Gas

D) None

Ans: C) Gas


40. On heating, solids generally:

A) Contract

B) Expand

C) Break

D) Disappear

Ans: B) Expand

41–50: Miscellaneous


41. Matter is made up of:

A) Atoms

B) Molecules

C) Particles

D) All of the above

Ans: D) All of the above


42. Which of the following is compressible?

A) Solid

B) Liquid

C) Gas

D) Plasma

Ans: C) Gas


43. Which state of matter flows easily?

A) Solid

B) Liquid

C) Gas

D) Both B and C

Ans: D) Both B and C


44. Inter-particle attraction is strongest in:

A) Solids

B) Liquids

C) Gases

D) Vapour

Ans: A) Solids


45. Which state has the least kinetic energy?

A) Solid

B) Liquid

C) Gas

D) Plasma

Ans: A) Solid


46. The boiling point of water at sea level is:

A) 100°F

B) 0°C

C) 212°C

D) 100°C

Ans: D) 100°C


47. Humidity affects:

A) Condensation

B) Melting

C) Evaporation

D) Boiling

Ans: C) Evaporation


48. Which process is used to obtain common salt from seawater?

A) Condensation

B) Crystallization

C) Evaporation

D) Filtration

Ans: C) Evaporation


49. Which process involves absorption of heat?

A) Condensation

B) Freezing

C) Sublimation

D) All of the above

Ans: C) Sublimation


50. The state of matter with variable shape and volume is:

A) Liquid

B) Solid

C) Gas

D) Plasma

Ans: C


Praveen Sir is a seasoned science expert with a passion for making complex concepts simple and accessible. He has been sharing his insights and knowledge through blogging since 2022, helping readers stay informed and inspired in the world of science and Maths.

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