# MCQ Questions for Class 9 Science Chapter 1 Matter in Our Surroundings with Answers

MCQ Solutions for Class 9 Science are a useful resource for students preparing for Class 9 Science exams. These solutions provide detailed answers and explanations to the Multiple Choice Questions (MCQs) at the end of each chapter in the Class 9 Science textbook.

They can help students understand the concepts better and improve their problem-solving skills.

Here are some tips for preparing for MCQ Science Class 9:

Understand the concept: It is important to first understand the concepts explained in the chapter before attempting the MCQs. This will help you identify the correct answer more easily.

Practice regularly: Solving MCQs regularly will help you improve your speed and accuracy in solving these questions. You can practice by attempting previous year question papers or by solving sample question papers.

Use the process of elimination: If you are not sure about the correct answer, you can try eliminating the options that you think are incorrect. This can increase your chances of selecting the correct answer.

Take online mock tests: Online mock tests are a good way to test your understanding and prepare for the final exams. These tests provide a simulated exam environment and help you identify your strengths and weaknesses.

I hope these tips are helpful. If you have any further questions, feel free to ask.

## Chapter-1 : Matter in Our Surroundings Class 9 Science MCQ’s with Answers

Q1. What is the matter?

1. anything that has mass.
2. anything that has volume.
3. anything that has mass and volume.
4. anything that has mass and volume and occupy space.

Ans. anything that has mass and volume and occupies space.

Q2. The matter is made up of:

1. cell
2. molecules
3. particles
4. gas

Ans. Particles

Q3. We cannot see the atom with:

1. naked eye
2. microscope
3. electron microscope
4. telescope

Ans. naked eye

Q4. Particles of matter have:

1. volume
2. speed
3. potential energy
4. space between them

Ans. space between them

Q5. Particles of the matter:

1. attract each other
2. repel each other
3. both of them
4. none of them

Ans. Attract each other

Q6. Matter exists in:

1. Three state
2. Two state
3. One state
4. Five state

Ans. Three state

Q7. Solids have distinct:

1. shape
2. size
3. volume
4. boundary

Ans. boundary

Q8. Mass per unit volume of a substance is called its:

1. density
2. volume
3. mass
4. kinetic energy

Ans. density

Q9. liquids are:

1. incompressible
2. compressible
3. light
4. all of them

Ans. incompressible

Q10. gases are:

1. incompressible
2. compressible
3. highly compressible
4. all of them

Ans. highly compressible

Q11. the density of gases is:

1. maximum
2. minimum
3. medium
4. none of the above

Ans. minimum

Q12. CNG (Compressed Natural Gas) is:

1. clean fuel
2. rocket fuel
3. CFCs
4. not a fuel

Ans. clean fuel

Q13. The states of matter are:

1. interchangeable
2. interconvertible
4. interconnected

Ans. interconvertible

Q14. The factor responsible for converting one state of matter into another:

1. change in temperature
2. change in pressure
3. both a and b
4. change in humidity

Ans. both a and b

Q15. The process of conversion of matter from its solid state to its liquid state at specific conditions of temperature and pressure is called:

1. boiling point
2. freezing point
3. vaporization
4. melting point

Ans. melting point

Q16. 0°C is:

1. 273 K
2. 274 K
3. 273.16 K
4. 274.16 K

Ans. 273.16 K

Q17. The amount of heat energy that is required to convert 1 kg of liquid into a gas without any rise in temperature is known as:

1. melting point
2. boiling point
3. latent heat
4. latent heat of vaporization

Ans. latent heat of vaporization

Q18. The SI unit of atmospheric pressure:

1. Pascal
2. Newton
3. Joule
4. Calorie

Ans. Pascal

Q19. The rate of evaporation …………. increasing the surface area of the liquid.

1. decrease
2. remains same
3. has no effect
4. increase

Ans. increase

Q20. the rate of evaporation of a liquid …………. with rising in temperature.

1. decrease
2. remains same
3. has no effect
4. increase

Ans. increase

Q21. evaporation causes?

1. heating effect
2. freezing effect
3. melting
4. cooling effect

Ans. cooling effect

Q22. Which of the following is not a physical property of matter?
a) Melting point
b) Density
c) Reactivity
d) Solubility

Ans. c) Reactivity

Q23. The process of conversion of a solid directly into a gas is called:
a) Sublimation
b) Condensation
c) Evaporation
d) Melting

Q24.The phenomenon in which a liquid changes into a gas at any temperature below its boiling point is called:
a) Condensation
b) Vaporization
c) Sublimation
d) Freezing

Q25. The boiling point of water at standard atmospheric pressure is:
a) 0°C
b) 100°C
c) -273°C
d) 373°C

Q26. The process of conversion of a gas directly into a solid is called:
a) Sublimation
b) Condensation
c) Evaporation
d) Deposition

Q27. The SI unit of pressure is:
a) Pascal
b) Newton
c) Kilogram
d) Joule

Q28. The process of conversion of a solid directly into a liquid is called:
a) Melting
b) Sublimation
c) Freezing
d) Evaporation

Q29. The temperature at which a substance changes from a liquid state to a solid state is called its:
a) Melting point
b) Boiling point
c) Freezing point
d) Condensation point

Q30. The three states of matter are:
a) Solid, liquid, and gas
b) Solid, liquid, and plasma
c) Liquid, gas, and plasma
d) Solid, gas, and plasma

Answer: a) Solid, liquid, and gas

Q31. The process of conversion of a liquid into its vapor below its boiling point is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Freezing

Q32. What is the characteristic property of particles of matter regarding their arrangement?
A. They have no arrangement
B. They are regularly arranged
C. They are randomly arranged
D. They are closely arranged

Answer: C. They are randomly arranged

Q33. Which of the following states of matter has the highest energy?
A. Solid
B. Liquid
C. Gas
D. They all have the same energy

Q34. Which state of matter has a fixed shape and volume?
A. Solid
B. Liquid
C. Gas
D. None of the above

Q35. What is the property that makes gases easily compressible?
A. Low energy
B. Random arrangement of particles
C. Large interparticle spaces
D. High interparticle attraction

Q36. Which of the following states of matter exhibits the highest density?
A. Solid
B. Liquid
C. Gas
D. They all have the same density

Q37. What happens to the interparticle force of attraction between particles as the temperature increases?
A. It increases
B. It decreases
C. It remains the same
D. It depends on the substance

Q38. What is the process by which a solid directly changes to a gas without going through the liquid phase called?
A. Melting
B. Evaporation
C. Sublimation
D. Fusion

Q39. At which temperature does water boil at standard atmospheric pressure?
A. 0°C
B. 100°C
C. 32°F
D. It depends on the altitude

Q40. Which factor does NOT affect the rate of evaporation?
A. Temperature
B. Surface area
C. Humidity
D. Wind speed

Q41. What is the process by which a gas directly changes to a solid without going through the liquid phase called?
A. Melting
B. Evaporation
C. Sublimation
D. Condensation

Q42. Which of the following is an example of a physical property of matter?
A. Flammability
B. Reactivity
C. Density
D. pH

Q43. What happens to the interparticle space between particles as matter changes from a solid to a liquid?
A. It decreases
B. It increases
C. It remains the same
D. It depends on the substance

Q44. What is the process called when a liquid changes to a gas at its boiling point?
A. Condensation
B. Evaporation
C. Sublimation
D. Fusion

Q45. Which of the following factors affects the rate of diffusion?
A. Particle size
B. Temperature
C. Pressure
D. All of the above

Answer: D. All of the above

Q46. What is the temperature at which a substance changes from a gas to a liquid called?
A. Freezing point
B. Boiling point
C. Melting point
D. Condensation point

Q47. Which of the following substances undergoes sublimation?
A. Iron
B. Water
C. Dry ice (solid carbon dioxide)
D. Salt

Answer: C. Dry ice (solid carbon dioxide)

Q48. What is the term used to describe the conversion of a gas directly into a solid without going through the liquid phase?
A. Melting
B. Evaporation
C. Sublimation
D. Condensation

Q49. Which of the following statements about the interparticle attraction in solids, liquids, and gases is true?
A. Solids have maximum interparticle attraction, liquids have medium attraction, and gases have minimum attraction.
B. Solids have minimum interparticle attraction, liquids have maximum attraction, and gases have medium attraction.
C. Solids, liquids, and gases have the same level of interparticle attraction.
D. Interparticle attraction is not relevant in determining the state of matter.

Answer: A. Solids have maximum interparticle attraction, liquids have medium attraction, and gases have minimum attraction.

Q50. Which of the following is an example of a physical change?
A. Burning of paper
B. Rusting of iron
C. Digestion of food
D. Melting of ice

Q51. What happens to the kinetic energy of particles as matter changes from a gas to a liquid?
A. It increases
B. It decreases
C. It remains the same
D. It depends on the substance

Q52. What is the process called when a gas changes directly to a solid without going through the liquid phase?
A. Melting
B. Evaporation
C. Sublimation
D. Condensation

Q53. Which of the following statements about the critical point of a substance is true?
A. It is the point at which the substance reaches its lowest temperature.
B. It is the point at which the substance reaches its highest pressure.
C. It is the point at which the substance undergoes sublimation.
D. It is the point at which the substance cannot exist as a liquid or gas.

Answer: D. It is the point at which the substance cannot exist as a liquid or gas.

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