Question

2. Which of the following pairs of substances may best be separated through distillation? *



sand and soil

salt and sand

water and soil

water and alcohol

3. The process of using strainer to separate smaller particles from bigger ones *



Fractional distillation

Condensation

Sieving

Evaporation

4. A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called __________? *



Fractional distillation

Condensation

Chromatography

Evaporation

5. Separating mixtures based on boiling points. *



Desalination

Condensation

Decantation

Distillation

6. Distillation uses two changes of state. what are they? *



Evaporation and condensation

Evaporation and freezing

melting and boiling

sublimation and condensation

7. It is a process for the separation of mixtures, carefully pouring a solution from a container, leaving the precipitate (sediments) in the bottom of the container. *



Distillation

Evaportation

Decantation

Handpicking

8. These separation techniques rely on the differences in size of the particles of the substances that make up the mixture. *



Winnowing, Panning and by using Machine

Decantation, Distillation and Coagulation

Handpicking, Threshing and by using magnet

Filtering, sieving and straining

9. This is a technique used to separate out homogeneous mixtures where there are one or more dissolved salts. The method drives off the liquid components from the solid components. *



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Answer 1

Answer:

1 water and soil ,2 cha sieving , 3cha chroma tography