MCQs on Matter in Our Surroundings-Class 9 Science NCERT Chapter 1

MCQs on Matter in Our Surroundings- Class 9 Science NCERT Chapter 1

1. Which of the following is NOT a characteristic of particles of matter?

(A) They have space between them
(B) They are stationary
(C) They attract each other
(D) They are always moving

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2. What happens to the kinetic energy of particles when the temperature increases?

(A) Decreases
(B) Remains constant
(C) Increases
(D) Becomes zero

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3. Which of the following is true regarding Matter?
(A) Anything that has no mass but occupies space
(B) Anything that has mass and occupies space
(C) Anything that has mass but does not occupy space
(D) Anything that is invisible and has no mass

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4. What is the SI unit of mass?
(A) Gram (g)
(B) Kilogram (kg)
(C) Litre (L)
(D) Metre (m)

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5. The intermixing of particles of two different types of matter on their own is called_______

(A) Sublimation
(B) Evaporation
(C) Diffusion
(D) Deposition

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6. What did the two schools of thought debate about the nature of matter?
(A) Whether matter is solid or liquid
(B) Whether matter is continuous or particulate
(C) Whether matter has mass or volume
(D) Whether matter is visible or invisible

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7. What force holds particles of matter together?

(A) Magnetic force
(B) Force of attraction
(C) Gravitational force
(D) Nuclear force

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8. What is the SI unit of volume?

(A) Kilogram (kg)
(B) Litre (L)
(C) Cubic metre (m³)
(D) Gram (g)

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9. Why can’t we cut the surface of water easily?

(A) Water particles repel each other
(B) Particles of matter have force acting between them.
(C) Water is a solid
(D) Surface tension is absent

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10. In all the three states of water (ice, liquid, and vapour), the chemical composition of water:

(a) is very different

(b) remains same

(c) sometimes same and sometimes different

(d) none of the above

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11. Which of the following statements is incorrect about the state of matter?

(a) The force of attraction between the gas particles is very less.

(b) Plasma consists of super-energetic and super-excited particles.

(c) The plasma glows with a special colour depending on the nature of the gas.

(d) Bose-Einstein condensate is formed by heating a gas of extremely low density.

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12. Ice floats on water because:

(a) its density is more than water

(b) its density is less than water

(c) it has less intermolecular space

(d) none of the above

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13. Ice at 0°C is more effective in cooling than water at the same temperature because:

(a) it holds latent heat

(b) the molecules use the heat to overcome the force of attraction

(c) it absorbs more heat

(d) it is colder

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14. What happens to the temperature of water as it boils when heat is consistently applied by a burner?

(a) Rises very slowly

(b) Rises rapidly until steam is produced

(c) First rises and then becomes constant

(d) Does not rise at all

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15. Which of the following conditions is most favourable for converting a gas into a liquid?

(A) High pressure, high temperature
(B) Low pressure, low temperature
(C) High pressure, low temperature
(D) Low pressure, high temperature

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16. What do we conclude from the activity of dissolving sugar in water?

(A) Particles of matter are very heavy
(B) Particles of matter do not move
(C) Particles of matter have space between them
(D) Sugar changes into gas

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17. What does the activity with an incense stick (agarbatti) show?

(A) Particles of matter are fixed
(B) Particles of matter are continuously moving
(C) Particles do not mix with air
(D) Air is a solid

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18. In which state of matter is diffusion the fastest?

(A) Solid
(B) Liquid
(C) Gas
(D) Plasma

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19. What do we learn from the activity with iron nail, chalk, and rubber band?

(A) Solids are compressible
(B) All substances are liquids
(C) Particles of matter attract each other
(D) Rubber band is not a solid

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20. What happens to the rate of diffusion when the temperature increases?

(A) It decreases
(B) It stops
(C) It remains the same
(D) It increases

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21. What does the ink drop experiment demonstrate?

(A) Liquids are compressible
(B) Particles move on their own
(C) All liquids have the same color
(D) Water has no particles

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22. What does with copper sulphate in hot and cold water show?
(A) Particles do not move in liquids
(B) Diffusion is faster in hot water than in cold water
(C) Particles are fixed in hot water
(D) Temperature does not affect particle movement

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23. What happens to the kinetic energy of particles when the temperature increases?
(A) It decreases
(B) It remains the same
(C) It increases
(D) It becomes zero

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24. Which activity shows that particles of matter attract each other?
(A) Dissolving sugar in water
(B) Breaking human chains
(C) Diluting potassium permanganate
(D) Adding ink to water

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25. In which of the following substance has particles held together with the greatest force?
(A) Rubber band
(B) Chalk
(C) Iron nail
(D) Water

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26. How many states of matter are mentioned in the chapter?
(A) Two
(B) Three
(C) Four
(D) Five

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27. Which of the following has a fixed shape and volume?

(A) Liquid
(B) Gas
(C) Solid
(D) Plasma

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28. Arrange the following in increasing order of compressibility:

Solid, Gas, Liquid
(A) Solid < Liquid < Gas
(B) Gas < Liquid < Solid
(C) Liquid < Gas < Solid
(D) Solid < Gas < Liquid

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29. Arrange the following in decreasing order of kinetic energy of particles:

Gas, Liquid, Solid
(A) Gas > Liquid > Solid
(B) Solid > Gas > Liquid
(C) Liquid > Gas > Solid
(D) Solid > Liquid > Gas

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30. Arrange the following in decreasing order of rate of diffusion:

Gases, Solids, Liquids
(A) Solids > Liquids > Gases
(B) Gases > Liquids > Solids
(C) Liquids > Solids > Gases
(D) Gases > Solids > Liquids

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31. Arrange the following in decreasing order of force of attraction between particles:

Solid, Gas, Liquid
(A) Gas > Liquid > Solid
(B) Solid > Liquid > Gas
(C) Liquid > Gas > Solid
(D) Solid > Gas > Liquid

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32. Arrange the following substances in increasing order of density:

Air, Water, Honey, Iron
(A) Iron < Honey < Water < Air
(B) Air < Water < Honey < Iron
(C) Honey < Iron < Water < Air
(D) Water < Air < Iron < Honey

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33. Which state of matter has the highest compressibility?

(A) Solid
(B) Liquid
(C) Gas
(D) None of these

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34. What happens to the particles of a solid when heat is applied?

(A) They stop moving
(B) They come closer
(C) They vibrate faster and may change into liquid
(D) They become gas directly

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35. Which of the following statements is NOT true for solids?

(A) Solids have fixed shape and volume
(B) Solids are rigid and incompressible
(C) Solids can flow
(D) Particles in solids are tightly packed

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36. What property of liquids allows aquatic animals to survive underwater?

(A) Liquids are solid-like
(B) Liquids dissolve oxygen and carbon dioxide
(C) Liquids are compressible
(D) Liquids have a fixed shape

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37. Which of the following has the weakest force of attraction between particles?

(A) Solid
(B) Liquid
(C) Gas
(D) Plasma

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38. Which of the following can flow and take the shape of the container?

(A) only Solid 
(B) only Liquid 
(C) only Gas
(D) Both liquid and gas

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39. Why do gases exert pressure on the walls of the container?

(A) Because gas particles are heavy
(B) Because gas particles are fixed
(C) Because gas particles move randomly and collide with the walls
(D) Because gas particles are cold

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40. Which of the following statements is true about liquids?

(A) Liquids have fixed shape and volume
(B) Liquids have fixed volume but no fixed shape
(C) Liquids are highly compressible
(D) Liquids have no definite volume

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41. Which of the following is an example of diffusion in gases?

(A) Sugar dissolving in water
(B) Ink spreading in water
(C) Smell of perfume spreading in a room
(D) Melting of ice

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42. Why do gases diffuse faster than solids and liquids?

(A) Because gases are heavier
(B) Because gas particles move slowly
(C) Because gases have high kinetic energy and more space between particles
(D) Because gases have strong attraction between particles

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43. Which of the following is used as a compressed gas in vehicles?

(A) LPG
(B) Steam
(C) CNG
(D) Oxygen

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44. Why is a sponge compressible even though it is a solid?

(A) It is made of gas
(B) It has air-filled pores
(C) It is a liquid
(D) It has no particles

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45. Which state of matter has the least force of attraction between particles?

(A) Solid
(B) Liquid
(C) Gas
(D) All have equal attraction

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46. Why does a rubber band change shape but is still considered a solid?

(A) It becomes a liquid when stretched
(B) It regains its original shape when the force is removed
(C) It has no particles
(D) It turns into gas

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47. What does LPG stand for?

(A) Liquid Petroleum Gas
(B) Low Pressure Gas
(C) Light Propane Gas
(D) Long Pipe Gas

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48. What does CNG stand for?

(A) Cold Natural Gas
(B) Compressed Natural Gas
(C) Combined Natural Gas
(D) Clean Natural Gas

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49. Which property of gases allows LPG and CNG to be stored under high pressure?

(A) Gases have a fixed shape
(B) Gases are rigid
(C) Gases are highly compressible
(D) Gases do not occupy space

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50. What is the melting point of ice?

(A) 373 K
(B) 100°C
(C) 273.15 K
(D) 0 K

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51. The heat energy required to change 1 kg of solid into liquid at its melting point is called:

(A) Latent heat of vaporisation
(B) Latent heat of fusion
(C) Specific heat
(D) Boiling point

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52. What happens to temperature during the change of state?

(A) It increases rapidly
(B) It decreases
(C) It remains constant
(D) It becomes zero

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53. Which of the following is an example of sublimation?

(A) Melting of ice
(B) Boiling of water
(C) Camphor changing into vapour
(D) Freezing of water

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54. What is the boiling point of water in Kelvin?

(A) 273 K
(B) 100 K
(C) 1000 K
(D) 373 K

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55. The process of a gas changing directly into a solid is called:

(A) Fusion
(B) Condensation
(C) Deposition
(D) Evaporation

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56. What is dry ice?

(A) Solid oxygen
(B) Solid carbon dioxide
(C) Frozen nitrogen
(D) Liquid carbon dioxide

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57. Which condition helps in liquefying gases?

(A) Low pressure and high temperature
(B) High pressure and low temperature
(C) High pressure and high temperature
(D) Low pressure and low temperature

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58. What is the minimum temperature at which a solid melts to become a liquid called?
(A) Boiling point
(B) Melting point
(C) Sublimation point
(D) Evaporation point

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59. What is the process of changing a solid into a liquid called?

(A) Condensation
(B) Freezing
(C) Fusion
(D) Sublimation

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60. Why does steam at 100°C cause severe burns compared to boiling water at the same temperature?

(A) Steam is wetter
(B) Steam releases the latent heat of vaporization
(C) Boiling water is denser
(D) Steam has no energy

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61. What do we call the temperature at which a liquid starts boiling?

(A) Melting point
(B) Freezing point
(C) Boiling point
(D) Latent point

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62. What is the SI unit of temperature?

(A) Degree Celsius
(B) Fahrenheit
(C) Joule
(D) Kelvin

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63. During the melting of ice at 0°C, the temperature of the system:

(A) Increases continuously
(B) Remains constant
(C) Decreases slowly
(D) Becomes 100°C

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64. Which of the following substances changes directly from solid to gas?

(A) Salt
(B) Camphor
(C) Sugar
(D) Ice

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65. Which process is the reverse of sublimation?

(A) Condensation
(B) Melting
(C) Deposition
(D) Boiling

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66. What remains constant during the change of state of a substance?

(A) Volume
(B) Temperature
(C) Pressure
(D) Color

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67. The process of a solid directly turning into a gas is called:

(A) Condensation
(B) Sublimation
(C) Evaporation
(D) Freezing

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68. What happens when pressure is increased on a gas?

(A) It turns into plasma
(B) It may liquefy
(C) It becomes lighter
(D) It always sublimes

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69. The temperature at which a solid melts is called its:

(A) Boiling point
(B) Freezing point
(C) Melting point
(D) Condensation point

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70. Why is solid CO₂ called “dry ice”?

(A) It is cold and wet
(B) It turns directly into gas (no liquid phase)
(C) It floats on water
(D) It is flammable

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71. Which factor does NOT affect the state of matter?

(A) Temperature
(B) Pressure
(C) Humidity
(D) Both (A) and (B)

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72. Latent heat is “hidden” because it:

(A) Changes temperature
(B) Changes state without temperature change
(C) Makes matter invisible
(D) Only works in solids

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73. How can atmospheric gases be liquefied?

(A) Increase temperature only
(B) Decrease pressure and increase temperature
(C) Increase pressure and decrease temperature
(D) Exposed to sunlight

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74. What is the latent heat of vaporization?
(A) Heat to change 1 kg of solid to liquid
(B) Heat to change 1 kg of liquid to gas
(C) Heat to change 1 kg of gas to solid
(D) Heat to change 1 kg of liquid to solid

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75. What is evaporation?

(A) Conversion of solid into gas directly
(B) Conversion of liquid into vapour below the boiling point
(C) Conversion of gas into liquid
(D) Conversion of liquid into solid

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76. Evaporation is a:

(A) Bulk phenomenon
(B) Surface phenomenon
(C) Only occurs at boiling point
(D) Doesn’t involve energy change

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77. Which of the following factors does NOT affect the rate of evaporation?

(A) Wind speed
(B) Humidity
(C) Shape of container
(D) Surface area

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78. Why does evaporation cause cooling?

(A) It releases heat to the surroundings
(B) It stores heat in liquid
(C) It absorbs heat from the surroundings
(D) It increases temperature

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79. Why do clothes dry faster on a windy day?

(A) Wind contains heat
(B) Wind reduces humidity
(C) Wind increases temperature
(D) Wind increases the rate of evaporation

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80. Which of the following will evaporate the fastest?

(A) Water in a closed bottle
(B) Water in a cup
(C) Water spilled on the floor
(D) Water in a thick book

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81. What happens when the humidity in the air is high?

(A) Evaporation increases
(B) Evaporation stops
(C) Evaporation slows down
(D) Water freezes

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82. Why do we feel cool when we apply perfume or acetone?

(A) They produce cold vapours
(B) They absorb heat from the skin during evaporation
(C) They block heat from the sun
(D) They are made of ice

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83. Which condition will increase the rate of evaporation?

(A) Decrease in temperature
(B) Increase in humidity
(C) Decrease in surface area
(D) Increase in wind speed

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84. What is humidity?

(A) Temperature of air
(B) Amount of water vapour in the air
(C) Pressure in the atmosphere
(D) Heat in the water

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85. Why do we sprinkle water on the roof on a hot day?

(A) To clean the surface
(B) To reduce dust
(C) To cool the roof through evaporation
(D) To make it slippery

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86. Water in an earthen pot (matka) becomes cool because:

(A) The pot radiates coldness
(B) Water evaporates through pores, absorbing heat
(C) Clay kills bacteria
(D) The pot is always kept in shade

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87. Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

(A) Saucer is magical
(B) A Larger surface area increases evaporation and cooling
(C) Tea changes color in saucers
(D) Cups are made of poor materials

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88. Desert coolers work best when:

(A) Humidity is high
(B) Humidity is low
(C) Temperature is low
(D) There is no wind

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89. What happens to the rate of evaporation if humidity increases?

(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Stops completely

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90. Why do we prefer cotton clothes in summer?

(A) Cotton prevents evaporation
(B) Cotton absorbs sweat, which evaporates and cools the body
(C) Cotton does not absorb sweat
(D) Cotton increases humidity

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91. Why does water appear on the outside of a glass filled with ice-cold water?
(A) Water leaks from the glass
(B) Water vapor in the air condenses on the cold surface
(C) The glass produces water
(D) The glass absorbs water from inside

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92. How does a higher temperature affect evaporation?
(A) It slows down evaporation
(B) It increases the rate of evaporation
(C) It prevents evaporation
(D) It changes liquid to solid

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93. Which activity demonstrates that particles of matter are always moving?

(A) Dissolving salt in water
(B) Observing incense stick smoke spread
(C) Breaking a chalk piece
(D) Compressing a sponge

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94. What can we conclude from the Activity of potassium permanganate?

(A) Matter is colorless
(B) Particles are extremely small
(C) Water expands when heated
(D) Particles are indestructible

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95. What happens when sugar is dissolved in water?

(A) Water level increases
(B) Sugar floats on top
(C) Sugar disappears, but the water level remains the same
(D) Sugar sinks to the bottom

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96. What can we conclude from the activity using Dettol and water?

(A) Dettol is heavier than water
(B) Dettol has no particles
(C) The smell of Dettol is due to small particles that spread
(D) Water changes to gas

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97. Which activity shows that matter is made up of particles?
(A) Heating water in a beaker
(B) Dissolving salt in water without changing the water level
(C) Compressing air in a syringe
(D) Breaking a rubber band

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98. What happens when salt is dissolved in water?

(A) Water level rises
(B) Salt particles disappear permanently
(C) Salt particles fill spaces between water particles
(D) Water turns into a gas

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99. The property to flow is unique to fluids. Which one of the following statements is correct?

(a) Only gases behave like fluids.
(b) Gases and solids behave like fluids.
(c) Gases and liquids behave like fluids.
(d) Only liquids are fluids.

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100. We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expert. This shows that:
(a) Particles of air are very far apart.
(b) Particles of air have weak forces of attraction.
(c) Particles of wood have strong forces of attraction.
(d) All of the above.

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