Chapter 7 of Class 8 Science, Particulate Nature of Matter is about constituent particles of matter, interparticle spaces, interparticle attraction, solids, liquids, gases, melting point, boiling point, evaporation, compressibility, diffusion, and movement of particles.
To help you revise the chapter, we’ve prepared MCQs and a match-the-following question based on this chapter. The interactive format of the question and answer ensures quick learning and better retention. So, lets start the exciting quiz. Its time to learn and have some fun while doing so.
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Class 8 Science Chapter 7 Particulate Nature of Matter MCQ Online Test Questions and Answers
Question 1. Breaking a piece of chalk into smaller pieces and then grinding it into powder shows that:
a) Chalk changes into a new substance
b) Chalk particles disappear completely
c) Chalk can be broken into smaller specks without changing its substance
d) Grinding is a chemical change
Answer:
c) Chalk can be broken into smaller specks without changing its substance
Question 2. Grinding chalk into powder is considered a:
a) Chemical change
b) Physical change
c) Biological change
d) Irreversible change only
Answer:
b) Physical change
Question 3. The basic unit that makes up a larger piece of a substance is called a:
a) Grain
b) Crystal
c) Constituent particle
d) Mixture
Answer:
c) Constituent particle
Question 4. When sugar dissolves in water, the sugar particles:
a) Get destroyed completely
b) Settle at the bottom at once
c) Break into constituent particles and spread in water
d) Change into water particles
Answer:
c) Break into constituent particles and spread in water
Question 5. After sugar dissolves completely in water, the top layer of water tastes sweet because:
a) Sugar floats only on top
b) Sugar particles are present throughout the solution
c) Water itself becomes sugar
d) Sweetness is produced by stirring
Answer:
b) Sugar particles are present throughout the solution
Question 6. The fact that dissolved sugar cannot be seen but can be tasted shows that matter is made of:
a) Very large particles
b) Extremely small particles
c) Only visible particles
d) Particles that have no mass
Answer:
b) Extremely small particles
Question 7. The tiny sugar particles occupy the spaces between water particles. These spaces are called:
a) Air gaps
b) Atomic holes
c) Interparticle spaces
d) Pressure zones
Answer:
c) Interparticle spaces
Question 8. The particles of matter are held together by forces that are:
a) Repulsive in nature
b) Attractive in nature
c) Always magnetic
d) Chemical only
Answer:
b) Attractive in nature
Question 9. The strength of interparticle attraction depends on the nature of the substance and the:
a) Colour of the substance
b) Interparticle distance
c) Shape of the container
d) Weight of the sample
Answer:
b) Interparticle distance
Question 10. Even a slight increase in distance between particles causes the interparticle forces to:
a) Increase sharply
b) Remain unchanged
c) Decrease drastically
d) Become magnetic
Answer:
c) Decrease drastically
Question 11. Solids have a definite shape and volume because their particles are:
a) Very far apart and free to move
b) Tightly packed with strong interparticle attraction
c) Continuously escaping the surface
d) Spread in all directions
Answer:
b) Tightly packed with strong interparticle attraction
Question 12. In solids, particles can mainly:
a) Move freely in all directions
b) Move past one another easily
c) Vibrate about their fixed positions
d) Leave the solid at room temperature continuously
Answer:
c) Vibrate about their fixed positions
Question 13. When a solid is heated, its particles:
a) Stop vibrating
b) Vibrate more vigorously
c) Become heavier
d) Lose all attraction instantly
Answer:
b) Vibrate more vigorously
Question 14. The minimum temperature at which a solid melts to become a liquid at atmospheric pressure is called its:
a) Freezing point
b) Boiling point
c) Melting point
d) Condensation point
Answer:
c) Melting point
Question 15. According to the table in the chapter, which substance has the highest melting point?
a) Ice
b) Urea
c) Iron
d) Water
Answer:
c) Iron
Question 16. Liquids do not have a fixed shape because their particles:
a) Are absent
b) Are free to move within a limited space
c) Are fixed permanently
d) Have no attraction at all
Answer:
b) Are free to move within a limited space
Question 17. Liquids have a definite volume but no fixed shape because their particles:
a) Can move freely in all available space
b) Are slightly farther apart than in solids but still remain close
c) Are packed more tightly than in solids
d) Do not move at all
Answer:
b) Are slightly farther apart than in solids but still remain close
Question 18. If water is transferred from one container to another of a different shape, the water:
a) Changes its volume completely
b) Keeps the same shape as before
c) Takes the shape of the new container but keeps the same volume
d) Loses both shape and volume
Answer:
c) Takes the shape of the new container but keeps the same volume
Question 19. The temperature at which a liquid boils and changes into vapour at atmospheric pressure is called its:
a) Melting point
b) Boiling point
c) Sublimation point
d) Freezing point
Answer:
b) Boiling point
Question 20. At the boiling point, vapour formation occurs:
a) Only at the surface of the liquid
b) Only at the bottom of the liquid
c) Throughout the liquid as well as at the surface
d) Only in coloured liquids
Answer:
c) Throughout the liquid as well as at the surface
Question 21. The slow conversion of a liquid into vapour from only its surface at temperatures below the boiling point is called:
a) Boiling
b) Melting
c) Evaporation
d) Condensation
Answer:
c) Evaporation
Question 22. Gases do not have a fixed shape or volume because their particles:
a) Are tightly packed
b) Have negligible interparticle attraction and move freely
c) Are larger than solid particles
d) Are fixed in place
Answer:
b) Have negligible interparticle attraction and move freely
Question 23. In the activity with smoke in gas jars, smoke spreads into the second gas jar because gases:
a) Have a fixed volume
b) Occupy only half the available space
c) Tend to fill the entire available space
d) Can move only upward
Answer:
c) Tend to fill the entire available space
Question 24. Both liquids and gases are called fluids because they:
a) Have fixed shape
b) Do not flow
c) Flow and do not retain a fixed shape
d) Are always colourless
Answer:
c) Flow and do not retain a fixed shape
Question 25. When air in a syringe is compressed by pushing the plunger inward, it shows that gas particles have:
a) No spaces between them
b) A lot of space between them
c) Strongest interparticle attraction
d) Fixed shape
Answer:
b) A lot of space between them
Question 26. Water is described as practically incompressible because its particles:
a) Have very large spaces between them
b) Are already much closer together than gas particles
c) Have no mass
d) Move only upward
Answer:
b) Are already much closer together than gas particles
Question 27. When sugar dissolves in water, the final volume of the solution is less than the sum of the separate volumes of sugar and water because:
a) Some sugar is destroyed
b) Water evaporates completely
c) Sugar particles occupy spaces between water particles
d) The container shrinks
Answer:
c) Sugar particles occupy spaces between water particles
Question 28. Sand does not dissolve in water and settles down because:
a) Sand has no particles
b) Water particles cannot pull out its constituent particles
c) Sand is lighter than water
d) Sand changes into liquid
Answer:
b) Water particles cannot pull out its constituent particles
Question 29. In solids, the space between particles contains:
a) Air only
b) Water vapour
c) Nothing at all
d) Dust particles
Answer:
c) Nothing at all
Question 30. Potassium permanganate spreads through water because:
a) Water particles are in constant motion
b) The tumbler is heated strongly
c) Potassium permanganate is lighter than water only
d) Water particles are stationary
Answer:
a) Water particles are in constant motion
Question 31. Potassium permanganate spreads fastest in hot water because:
a) Hot water has no particles
b) Particles move faster when heated
c) Hot water has the maximum volume always
d) Heat changes potassium permanganate into gas immediately
Answer:
b) Particles move faster when heated
Question 32. The fragrance of an incense stick spreads throughout a room because:
a) Fragrance particles remain fixed near the stick
b) Air particles are constantly moving and spread the fragrance particles
c) The room temperature becomes zero
d) The fragrance particles are visible
Answer:
b) Air particles are constantly moving and spread the fragrance particles
Question 33. Which state of matter has maximum interparticle spacing and negligible interparticle attraction?
a) Solid
b) Liquid
c) Gas
d) All states equally
Answer:
c) Gas
Question 34. Which state of matter has the least interparticle spacing and the strongest interparticle attraction?
a) Gas
b) Liquid
c) Solid
d) Vapour
Answer:
c) Solid
Question 35 – Match the Following
| Column A | Column B |
|---|---|
| 1. Solid | A. No fixed shape or volume |
| 2. Liquid | B. Fixed shape and fixed volume |
| 3. Gas | C. Fixed volume but no fixed shape |
| 4. Melting point | D. Temperature at which a solid changes into liquid |
| 5. Boiling point | E. Temperature at which a liquid changes into vapour |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Solid | B. Fixed shape and fixed volume |
| 2. Liquid | C. Fixed volume but no fixed shape |
| 3. Gas | A. No fixed shape or volume |
| 4. Melting point | D. Temperature at which a solid changes into liquid |
| 5. Boiling point | E. Temperature at which a liquid changes into vapour |
Question 36 – Match the Following
| Column A | Column B |
|---|---|
| 1. Sugar dissolved in water | A. Shows gases are highly compressible |
| 2. Air in a syringe | B. Shows particles of water are moving constantly |
| 3. Potassium permanganate in water | C. Shows fragrance particles spread through air |
| 4. Incense stick fragrance | D. Sugar particles occupy spaces between water particles |
| 5. Sand in water | E. Insoluble solid that settles and increases total volume |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Sugar dissolved in water | D. Sugar particles occupy spaces between water particles |
| 2. Air in a syringe | A. Shows gases are highly compressible |
| 3. Potassium permanganate in water | B. Shows particles of water are moving constantly |
| 4. Incense stick fragrance | C. Shows fragrance particles spread through air |
| 5. Sand in water | E. Insoluble solid that settles and increases total volume |
