Illustration of matter states or particles.

Is Matter Around Us Pure? - Class 9 Science Quiz

A Quiz for CBSE Class 9 Science Students (Set 3)

Test your understanding with Set 3 of our 'Is Matter Around Us Pure?' Class 9 Science quiz. This quiz explores suspensions, colloidal solutions, and their distinguishing properties. Are you ready to begin?

1. If 110 g of salt is present in 550 g of solution, calculate the concentration of the solution?

A) 10% B) 15% C) 20% D) 25%

2. What is a heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium?

A) Solution B) Colloid C) Suspension D) Alloy

3. What is the approximate size range of particles in a suspension?

A) Less than 1 nm B) Between 1 nm and 100 nm C) More than 100 nm D) Not measurable

4. Why are particles in a suspension visible to the naked eye?

A) Because they are transparent. B) Because they are very small. C) Because they are large enough. D) Because they reflect light perfectly.

5. Does a suspension show the Tyndall effect?

A) No, never. B) Yes, it scatters a beam of light passing through it. C) Only when diluted. D) Only at high temperatures.

6. Can solute particles in a suspension be separated from the mixture by filtration?

A) No, never. B) Yes, they settle down when left undisturbed. C) Only by evaporation. D) Only by distillation.

7. What happens to the particles in a suspension when it is left undisturbed?

A) They dissolve completely. B) They become invisible. C) They settle down. D) They float to the surface.

8. Which term describes a heterogeneous mixture where the particles are uniformly spread throughout the solution and the size of particles is too small to be individually seen by naked eye?

A) Solution B) Suspension C) Colloidal solution (sol) D) Pure substance

9. What is another name for a colloidal solution?

A) Pure substance B) True solution C) Sol D) Precipitate

10. What is the approximate size range of particles in a colloidal solution?

A) Less than 1 nm B) Between 1 nm and 100 nm C) More than 100 nm D) Visible to the naked eye

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Is Matter Around Us Pure? Quizzes

Is Matter Around Us Pure Set 1 Is Matter Around Us Pure Set 2 Is Matter Around Us Pure Set 3

Is Matter Around Us Pure? - Class 9 Science Quiz

A Quiz for CBSE Class 9 Science Students (Set 3)

1. If 110 g of salt is present in 550 g of solution, calculate the concentration of the solution? Read

2. What is a heterogeneous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the medium? Read

3. What is the approximate size range of particles in a suspension? Read

4. Why are particles in a suspension visible to the naked eye? Read

5. Does a suspension show the Tyndall effect? Read

6. Can solute particles in a suspension be separated from the mixture by filtration? Read

7. What happens to the particles in a suspension when it is left undisturbed? Read

8. Which term describes a heterogeneous mixture where the particles are uniformly spread throughout the solution and the size of particles is too small to be individually seen by naked eye? Read

9. What is another name for a colloidal solution? Read

10. What is the approximate size range of particles in a colloidal solution? Read