If you are a Class 9 student preparing for school exams, unit tests, or board-level concepts, the chapter Matter in Our Surroundings is one of the most important topics in Science. This chapter builds the foundation for understanding the physical nature of matter and is frequently tested through objective questions.
In this post, you will find matter in our surroundings Class 9 MCQ questions designed to help you revise key concepts such as states of matter, properties of solids, liquids, and gases, evaporation, condensation, and temperature effects.
These MCQs are prepared in simple language and exam-oriented format so that students can easily understand concepts, improve accuracy, and gain confidence before exams.
Important MCQs from Matter in Our Surroundings Class 9
Q1. Which of the following best defines matter?
- A. Anything that has mass and occupies space
- B. Anything that is visible
- C. Anything that produces energy
- D. Anything that can be measured
Answer: A
Explanation: Matter is defined as anything that has mass and occupies space.
Q2. Which state of matter has a definite shape and definite volume?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: A
Explanation: Solids have both fixed shape and fixed volume.
Q3. The particles of which state of matter have the highest kinetic energy?
- A. Solid
- B. Liquid
- C. Gas
- D. All have equal energy
Answer: C
Explanation: Gas particles move freely and rapidly, so they have the highest kinetic energy.
Q4. Which process converts a solid directly into gas?
- A. Evaporation
- B. Condensation
- C. Sublimation
- D. Melting
Answer: C
Explanation: Sublimation is the direct change of a solid into gas.
Q5. Which of the following is an example of diffusion?
- A. Freezing of water
- B. Smell of perfume spreading in a room
- C. Melting of ice
- D. Condensation of steam
Answer: B
Explanation: Diffusion is the intermixing of particles, faster in gases.
Q6. What happens to the force of attraction between particles when temperature increases?
- A. Increases
- B. Decreases
- C. Remains same
- D. Becomes zero
Answer: B
Explanation: Increase in temperature increases kinetic energy, reducing attraction between particles.
Q7. Which factor does NOT affect evaporation?
- A. Surface area
- B. Temperature
- C. Humidity
- D. Volume of liquid
Answer: D
Explanation: Evaporation depends on surface area, temperature, humidity, and wind speed.
Q8. The change of gas into liquid is called:
- A. Evaporation
- B. Sublimation
- C. Condensation
- D. Freezing
Answer: C
Explanation: Condensation occurs when gas loses heat and turns into liquid.
Q9. Which state of matter is highly compressible?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: C
Explanation: Gases have large intermolecular spaces, making them highly compressible.
Q10. Why do solids have a fixed shape?
- A. High kinetic energy of particles
- B. Weak intermolecular forces
- C. Strong intermolecular forces
- D. Large spaces between particles
Answer: C
Explanation: Strong intermolecular forces keep particles tightly packed in solids.
Q11. Which of the following shows the weakest intermolecular force of attraction?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: C
Explanation: Gases have maximum intermolecular space and weakest force of attraction.
Q12. What is the SI unit of temperature?
- A. Celsius
- B. Fahrenheit
- C. Kelvin
- D. Joule
Answer: C
Explanation: Kelvin is the SI unit of temperature.
Q13. Which of the following can flow easily?
- A. Solid only
- B. Liquid only
- C. Gas only
- D. Liquid and gas
Answer: D
Explanation: Liquids and gases are fluids and can flow easily.
Q14. What is the process of changing liquid into gas at any temperature below boiling point?
- A. Boiling
- B. Sublimation
- C. Evaporation
- D. Condensation
Answer: C
Explanation: Evaporation occurs at all temperatures from the surface of liquid.
Q15. Which factor increases the rate of evaporation?
- A. High humidity
- B. Low temperature
- C. Increased surface area
- D. Decreased wind speed
Answer: C
Explanation: Larger surface area increases evaporation.
Q16. Why does evaporation cause cooling?
- A. High-energy particles leave the liquid
- B. Low-energy particles escape
- C. Temperature increases
- D. Liquid absorbs heat
Answer: A
Explanation: High-energy particles escape, reducing average kinetic energy.
Q17. Which change of state occurs on heating a solid?
- A. Freezing
- B. Condensation
- C. Melting
- D. Sublimation
Answer: C
Explanation: Heating a solid converts it into liquid by melting.
Q18. Which of the following substances shows sublimation?
- A. Common salt
- B. Sugar
- C. Camphor
- D. Sand
Answer: C
Explanation: Camphor directly changes from solid to gas.
Q19. Which property of matter explains diffusion?
- A. High density
- B. Particle motion
- C. Fixed shape
- D. Hardness
Answer: B
Explanation: Continuous motion of particles causes diffusion.
Q20. What happens to particles during boiling?
- A. They stop moving
- B. They gain kinetic energy
- C. They lose mass
- D. They become heavier
Answer: B
Explanation: Particles gain kinetic energy and escape as gas.
Q21. Which state of matter does not have a fixed volume?
- A. Solid
- B. Liquid
- C. Gas
- D. Ice
Answer: C
Explanation: Gases neither have fixed shape nor fixed volume.
Q22. What is the boiling point of water at normal atmospheric pressure?
- A. 0°C
- B. 50°C
- C. 100°C
- D. 212°C
Answer: C
Explanation: Water boils at 100°C under normal pressure.
Q23. Which term describes the amount of matter in an object?
- A. Density
- B. Volume
- C. Mass
- D. Weight
Answer: C
Explanation: Mass is the amount of matter present in a body.
Q24. What happens to gas particles when pressure increases?
- A. They move faster
- B. They come closer
- C. They disappear
- D. They lose mass
Answer: B
Explanation: Increased pressure decreases intermolecular space.
Q25. Which of the following is NOT a physical change?
- A. Melting of ice
- B. Boiling of water
- C. Burning of paper
- D. Freezing of water
Answer: C
Explanation: Burning of paper is a chemical change.
Q26. Why can gases be compressed easily?
- A. Strong attraction between particles
- B. Very small particles
- C. Large intermolecular space
- D. Fixed volume
Answer: C
Explanation: Large spaces allow gases to compress easily.
Q27. Which state of matter is called rigid?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: A
Explanation: Solids are rigid due to strong intermolecular forces.
Q28. What is latent heat?
- A. Heat used to raise temperature
- B. Heat released during cooling
- C. Heat absorbed without temperature change
- D. Heat lost to surroundings
Answer: C
Explanation: Latent heat changes state without changing temperature.
Q29. Which phenomenon proves that particles of matter are continuously moving?
- A. Freezing
- B. Diffusion
- C. Condensation
- D. Melting
Answer: B
Explanation: Diffusion occurs due to constant particle motion.
Q30. Which of the following has the maximum intermolecular space?
- A. Solid
- B. Liquid
- C. Gas
- D. All equal
Answer: C
Explanation: Gases have maximum intermolecular space.
Q31. What is the process of change of gas directly into solid called?
- A. Condensation
- B. Deposition
- C. Sublimation
- D. Freezing
Answer: B
Explanation: Deposition is the direct change of gas into solid.
Q32. Which of the following has the highest density?
- A. Solid
- B. Liquid
- C. Gas
- D. All have same density
Answer: A
Explanation: Solids generally have the highest density.
Q33. What happens to the kinetic energy of particles on heating?
- A. Decreases
- B. Remains same
- C. Increases
- D. Becomes zero
Answer: C
Explanation: Heating increases kinetic energy of particles.
Q34. Which of the following is a characteristic of gases?
- A. Fixed shape
- B. Fixed volume
- C. High compressibility
- D. Strong intermolecular force
Answer: C
Explanation: Gases are highly compressible.
Q35. Which factor decreases the rate of evaporation?
- A. Increase in temperature
- B. Increase in wind speed
- C. Increase in surface area
- D. Increase in humidity
Answer: D
Explanation: High humidity reduces evaporation.
Q36. Which state of matter is least compressible?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: A
Explanation: Solids are almost incompressible.
Q37. What is the SI unit of mass?
- A. Gram
- B. Kilogram
- C. Newton
- D. Liter
Answer: B
Explanation: Kilogram is the SI unit of mass.
Q38. Which phenomenon explains the cooling effect of evaporation?
- A. Loss of low-energy particles
- B. Absorption of heat from surroundings
- C. Increase in temperature
- D. Decrease in surface area
Answer: B
Explanation: Evaporation absorbs heat from surroundings causing cooling.
Q39. Which of the following can diffuse fastest?
- A. Solid
- B. Liquid
- C. Gas
- D. All equal
Answer: C
Explanation: Diffusion is fastest in gases.
Q40. What happens when pressure is applied to a gas?
- A. Volume increases
- B. Volume decreases
- C. Temperature decreases
- D. Density decreases
Answer: B
Explanation: Gas volume decreases under pressure.
Q41. Which state of matter has no fixed shape but fixed volume?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: B
Explanation: Liquids have fixed volume but no fixed shape.
Q42. What is the melting point of ice?
- A. 0°C
- B. 32°C
- C. 100°C
- D. –10°C
Answer: A
Explanation: Ice melts at 0°C.
Q43. Which property of matter allows it to be stretched into wires?
- A. Ductility
- B. Malleability
- C. Hardness
- D. Elasticity
Answer: A
Explanation: Ductility allows materials to be drawn into wires.
Q44. Which change of state releases heat?
- A. Melting
- B. Evaporation
- C. Condensation
- D. Sublimation
Answer: C
Explanation: Condensation releases heat.
Q45. Which of the following is NOT a property of matter?
- A. Mass
- B. Volume
- C. Shape
- D. Color of light
Answer: D
Explanation: Color of light is not a property of matter.
Q46. Which state of matter is used in LPG cylinders?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: B
Explanation: LPG is stored in liquid form under high pressure.
Q47. Which process requires absorption of heat?
- A. Freezing
- B. Condensation
- C. Evaporation
- D. Deposition
Answer: C
Explanation: Evaporation absorbs heat from surroundings.
Q48. Which factor does NOT affect diffusion?
- A. Temperature
- B. Nature of medium
- C. Size of particles
- D. Color of substance
Answer: D
Explanation: Color does not affect diffusion.
Q49. Which of the following has minimum intermolecular force?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
Answer: C
Explanation: Gases have weakest intermolecular forces.
Q50. What happens to volume of a liquid on heating?
- A. Decreases
- B. Remains same
- C. Increases
- D. Becomes zero
Answer: C
Explanation: Liquids expand slightly on heating.
We hope this post on matter in our surroundings Class 9 MCQ helps you revise the chapter effectively and score better in your examinations. Regular practice of MCQs strengthens conceptual clarity and improves problem-solving skills.
For Class 9 students, understanding basic science concepts is essential for higher classes. With focused practice and the right study material, learning becomes easier and more enjoyable.
Keep practicing and explore more chapter-wise MCQs to stay well-prepared for your exams.
