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Instructions. Answer all questions. Fill exactly one bubble per question on the OMR sheet.
Matter in Our Surroundings
1.Which of the following statements is true about the particles of matter?
- (A)
They are continuously moving.
- (B)
They attract each other.
- (C)
They have spaces between them.
- (D)
All of the above.
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Answer: (D)All of the above.
Matter in Our Surroundings · Easy
- (A)
- 2.
What is the process by which a solid changes directly into a gas without passing through the liquid state?
- (A)
Condensation
- (B)
Melting
- (C)
Sublimation
- (D)
Evaporation
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Answer: (C)Sublimation
Matter in Our Surroundings · Medium
- (A)
- 3.
Which property of gases allows them to be compressed easily?
- (A)
Fixed shape and volume
- (B)
Large spaces between particles
- (C)
Particles are tightly packed
- (D)
Strong intermolecular forces
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Answer: (B)Large spaces between particles
Matter in Our Surroundings · Medium
- (A)
- 4.
At what temperature does water boil at standard atmospheric pressure in Celsius?
- (A)
273.15°C
- (B)
373.15°C
- (C)
100°C
- (D)
0°C
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Answer: (C)100°C
Matter in Our Surroundings · Easy
- (A)
- 5.
Why does the temperature of a substance remain constant during a phase change, even though heat is being supplied?
- (A)
The heat is lost to the surroundings.
- (B)
The heat is used to increase the kinetic energy of particles.
- (C)
The substance has reached its maximum temperature.
- (D)
The heat is used to overcome the forces of attraction between particles.
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Answer: (D)The heat is used to overcome the forces of attraction between particles.
Matter in Our Surroundings · Hard
- (A)
— End of the paper · updated 22 October 2026 —
