CBSE Class 9 Science Exploring Mixtures and Their Separation (Class 9 NCERT New) Quiz 9

1. Fill in the blank for Solution: ________

A homogeneous B heterogeneous C colloidal D suspension

2. Fill in the blank for Suspension: ________

A heterogeneous B homogeneous C colloidal D solution

3. Fill in the blank for Colloid: ________

A heterogeneous B homogeneous C solid D liquid

4. Table 5.1: Properties of different types of mixturesProperty: Particle sizeFill in the blank for Solution: ________

A very small (molecular size) B large (visible to naked eye) C medium (colloidal size) D granular (sand-sized particles)

5. Table 5.1: Properties of different types of mixtures Property: Particle size Fill in the blank for Suspension: ________

A large (can be seen with naked eye) B small (cannot be seen with naked eye) C medium (visible under microscope) D very fine (dissolved completely)

6. Mixtures are classified as ________ or ________ and also as solutions, suspensions, or colloids.

A homogeneous, heterogeneous B solid, liquid C organic, inorganic D acidic, basic

7. Separation of mixtures is a crucial process for obtaining pure substances.

A True B False

8. Crystallization is a technique used to get a pure solid from its ________ solution.

A saturated B unsaturated C dilute D concentrated

9. Distillation is used to separate two miscible liquids with a minimum difference of ________ °C in boiling points.

A 25 B 5 C 10 D 50

10. Paper chromatography can be used to separate compounds by taking advantage of differences in their rates of movement on the ________.

A paper B glass C metal D plastic