Separation Techniques

What is the name of this separation technique?

(a)  

Name the above separation technique.

(a)  

Name the above separation technique.

(a)  

Dyes (颜料) in a marker pen may be separated by ..................

• distillation

• filtration

• paper chromatography

• evaporation

Sand will not dissolve (v. 溶解) in water because sand is ...............

• dissolved

• soluble

• insoluble

• filtrate

Which separation technique is used to obtain (获取) pure water from seawater?

• Distillation

• Filtration

• Paper chromatography

• Evaporation

Which ink is most soluble?

Hint: look at the spot which travels the furthest from start line

• Blue

• Red

• Yellow

• Green

Which two process are involved in distillation technique?

• Freezing and evaporation

• Evaporation and boiling

• Boiling and condensation

What process is occurring at the point labelled Y?

• Evaporation

  (from liquid to gas)

• Condensation

  (from gas to liquid)

• Melting

  (from solid to liquid)

• Freezing

  (from liquid to solid)

chromatography separates the mixture of dyes (颜料) on the basis of their ----------------------------

• density 密度

• solubility 可溶性

• gravity 重力

• boiling point 沸点