Looking for authentic SEBA Class 9 Science Chapter 1 (Matter in Our Surroundings) MCQ solutions for the 2026–27 academic year? Access complete multiple-choice questions with correct options, detailed explanations, temperature conversion calculations, states of matter objective notes, and latent heat concepts to score top marks in your annual exams.
MCQ
1. Matter is anything that:
a) Has mass
b) Occupies space
c) Both a and b
d) None
Ans: c
2. Which of the following is NOT matter?
a) Air
b) Heat
c) Water
d) Stone
Ans: b
3. Ancient Indian philosophers believed matter was made of:
a) Atoms
b) Molecules
c) Panch Tatva
d) Dust
Ans: c
4. The potassium permanganate experiment proves:
a) Particles are very large
b) Particles are tiny and divisible
c) Water becomes purple
d) Nothing happens
Ans: b
5. The smell of Dettol spreading in water shows:
a) Particles burn
b) Particles are heavy
c) Particles spread (diffuse)
d) Particles disappear
Ans: c
6. Sugar dissolves in water because:
a) Sugar melts
b) Water disappears
c) There are spaces between particles
d) Sugar is liquid
Ans: c
7. The spreading of colour in water is called:
a) Melting
b) Diffusion
c) Condensation
d) Sublimation
Ans: b
8. Faster movement of particles occurs when:
a) Temperature decreases
b) Temperature increases
c) Water freezes
d) Air is removed
Ans: b
9. Strongest forces of attraction are found in:
a) Solids
b) Liquids
c) Gases
d) Vapours
Ans: a
10. Weakest forces of attraction are found in:
a) Solid
b) Liquid
c) Gas
d) Metal
Ans: c
SEBA Class 9 Science Chapter 1 MCQ Solutions
11. A solid has:
a) Fixed shape
b) Fixed volume
c) Both a and b
d) No definite shape
Ans: c
12. A liquid has:
a) No fixed shape
b) Fixed volume
c) Both a and b
d) No volume
Ans: c
13. A gas is:
a) Highly compressible
b) Not compressible
c) Like solids
d) Always cold
Ans: a
14. LPG and CNG are stored by:
a) Cooling only
b) High pressure
c) Breaking particles
d) Burning
Ans: b
15. Gas particles move:
a) Very slowly
b) Very fast
c) Do not move
d) Only downwards
Ans: b
16. Diffusion is faster in:
a) Solids
b) Liquids
c) Gases
d) Metals
Ans: c
17. Perfume spreads quickly in a room because:
a) Gases have high kinetic energy
b) Perfume is heavy
c) Air is still
d) Air has no particles
Ans: a
18. Solid changing to liquid is called:
a) Freezing
b) Melting
c) Sublimation
d) Evaporation
Ans: b
19. Ice melts at:
a) 0°C
b) 100°C
c) 20°C
d) –10°C
Ans: a
20. The temperature remains constant during melting because:
a) Heat is lost
b) Heat breaks attraction between particles
c) Ice is cold
d) Water evaporates
Ans: b
Class 9 Science Chapter 1 MCQ Question Answer SEBA 2026-27
21. Heat needed to change solid → liquid is called:
a) Latent heat of vaporisation
b) Latent heat of fusion
c) Boiling point
d) Condensation heat
Ans: b
22. Liquid changes to gas at:
a) Sublimation
b) Boiling
c) Freezing
d) Melting
Ans: b
23. Water boils at:
a) 0°C
b) 100°C
c) 50°C
d) 150°C
Ans: b
24. Liquid → Gas below boiling point is:
a) Boiling
b) Evaporation
c) Melting
d) Condensation
Ans: b
25. Steam at 100°C has more heat than water at 100°C because:
a) Steam is hot
b) Steam contains latent heat
c) Water cools
d) Water evaporates
Ans: b
26. Sublimation is:
a) Solid → liquid
b) Solid → gas directly
c) Gas → liquid
d) Liquid → solid
Ans: b
27. Which substance shows sublimation?
a) Salt
b) Iron
c) Camphor
d) Wood
Ans: c
28. Dry ice is:
a) Liquid CO₂
b) Solid CO₂
c) Gas CO₂
d) Water ice
Ans: b
29. Gas can be liquefied by:
a) Increasing pressure
b) Decreasing pressure
c) Heating
d) Freezing
Ans: a
30. When pressure on solid CO₂ is reduced, it:
a) Becomes liquid
b) Becomes gas directly
c) Becomes solid
d) Freezes
Ans: b
Matter in Our Surroundings Class 9 SEBA MCQ Notes
31. Evaporation occurs at:
a) Boiling point
b) All temperatures
c) Freezing point
d) Only at night
Ans: b
32. Which factor increases evaporation?
a) Decreased surface area
b) Lower temperature
c) Higher wind speed
d) Increased humidity
Ans: c
33. Evaporation causes cooling because:
a) Water becomes cold
b) Particles absorb heat from surroundings
c) Air becomes wet
d) Temperature falls automatically
Ans: b
34. Clothes dry faster on a windy day because:
a) Wind stops evaporation
b) Wind increases evaporation
c) Wind removes heat
d) Wind warms clothes
Ans: b
35. More humidity means:
a) Faster evaporation
b) Slower evaporation
c) No evaporation
d) Equal evaporation
Ans: b
36. Nail polish remover feels cold due to:
a) Melting
b) Evaporation
c) Condensation
d) Freezing
Ans: b
37. Water drops on the outside of a cold glass form due to:
a) Melting
b) Condensation
c) Sublimation
d) Evaporation
Ans: b
38. Cotton is best in summer because:
a) It is colourful
b) It absorbs sweat and increases evaporation
c) It blocks air
d) It keeps body hot
Ans: b
39. Solids have particles that:
a) Move freely
b) Are tightly packed
c) Are very far apart
d) Cause no attraction
Ans: b
40. Liquids can flow because:
a) Particles are fixed
b) Particles are loosely packed
c) They have no particles
d) They are gases
Ans: b
SEBA Class 9 Science Chapter 1 Multiple Choice Questions
41. Gases fill the entire container because:
a) They are heavy
b) Particles move fast and far apart
c) They have colour
d) They are cold
Ans: b
42. Gas → Liquid is called:
a) Condensation
b) Freezing
c) Melting
d) Evaporation
Ans: a
43. Liquid → Solid is called:
a) Condensation
b) Freezing
c) Sublimation
d) Filtration
Ans: b
44. Gas → Solid directly is called:
a) Sublimation
b) Deposition
c) Melting
d) Boiling
Ans: b
45. Melting point is defined as:
a) Temp. at which liquid freezes
b) Temp. at which solid melts
c) Temp. at which gas liquefies
d) Temp. at which gas freezes
Ans: b
46. When salt is dissolved in water, what happens to the salt particles?
a) They float on the surface
b) They settle at the bottom
c) They spread between water particles
d) They disappear completely forever
Answer: c
47. When salt dissolves in water, the water level:
a) Increases
b) Decreases
c) Remains almost the same
d) Doubles
Answer: c
48. When potassium permanganate crystals are dissolved in water, the colour spreads because of:
a) Evaporation
b) Diffusion
c) Filtration
d) Melting
Answer: b
49. Why can we smell a burning incense stick from far away?
a) Because smell is strong
b) Because gas particles diffuse fast
c) Because air becomes hot
d) Because smoke becomes solid
Answer: b
50. A drop of ink spreads faster in water than honey because:
a) Ink is colourful
b) Ink particles are lighter and diffuse faster
c) Honey is hot
d) Water rejects honey
Answer: b
Class 9 Science Matter Objective Questions
51. Potassium permanganate dissolves faster in hot water because:
a) Hot water particles move faster
b) Hot water has more colour
c) Cold water stops diffusion
d) Hot water evaporates
Answer: a
52. Which human chain was easiest to break?
a) Students holding tightly
b) Students holding hands
c) Students touching fingertips
d) Cannot be broken
Answer: c
53. This activity shows that:
a) Solids have strongest forces of attraction
b) Liquids have no force of attraction
c) Gases have the strongest attraction
d) Solids can be broken easily
Answer: a
54. Which material shows the strongest particle attraction?
a) Chalk
b) Rubber band
c) Iron nail
d) Paper
Answer: c
55. Water cannot be cut easily because:
a) Water is solid
b) Particles attract each other
c) Water is hot
d) Water is heavy
Answer: b
56. Solid objects like pen or book have:
a) No shape
b) No boundary
c) Definite shape and volume
d) Unlimited compressibility
Answer: c
57. When a liquid is poured into different containers, its:
a) Volume changes
b) Shape changes
c) Mass disappears
d) Colour changes
Answer: b
58. Liquids flow because:
a) They have loosely packed particles
b) They are hard
c) They have fixed shape
d) They have strong attraction
Answer: a
59. Which content in a syringe is easiest to compress?
a) Solid pieces
b) Liquid water
c) Air
d) Chalk powder
Answer: c
60. This activity shows that gases:
a) Cannot be compressed
b) Are highly compressible
c) Are rigid
d) Have fixed volume
Answer: b
61. When camphor is heated, it:
a) Melts into liquid
b) Changes from solid to gas
c) Turns into water
d) Becomes a powder
Answer: b
62. Sublimation means:
a) Gas → Liquid
b) Solid → Gas directly
c) Liquid → Solid
d) Gas → Solid
Answer: b
63. Water evaporates fastest when kept:
a) In a closed cupboard
b) In an open dish near a fan
c) In a fridge
d) In a bottle
Answer: b
64. Evaporation is fastest when:
a) Surface area is small
b) Air is still
c) Temperature is low
d) Wind speed is high
Answer: d
🔬 Updated MCQ Guide Notice: This page features a full collection of SEBA Class 9 Science Chapter 1 (Matter in Our Surroundings) Multiple Choice Questions (MCQs) with accurate options and detailed explanations, fully updated for the 2026–27 academic session in accordance with the latest revised Assam Board (SEBA) curriculum.
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