Separation Techniques

True or False: If a mixture contains 2 substances, I only need 1 separating technique to separate them

• True

• False

True or False: Since the boiling point of ethanol is 78 $\degree C$  , the condensation point of ethanol is 77 $\degree C$  

• True

• False

True or False: Filtration can be used to separate solutions

• True

• False

True or False: Separation by crystallisation yields a purer product than heating to dryness

• True

• False

Select all the examples of mixtures below:

• Air

• Salt water

• Pure honey

• Calcium carbonate

Which of the following statements tells us that a sample of liquid is pure water?

• It is colourless.

• It leaves no residue when filtered.

• It boils at 100^oC.

• It is odourless.

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

• Simple distillation

• Filtration

• Chromatography

• Evaporation

What is the physical property that fractional distillation depends on?

• different boiling points

• different melting points

• different solubilities

• different densities

For paper chromatography to work,

• the dyes must have different boiling points.

• the dyes must have different solubilities in the solvent.

• the starting line on the chromatogram must be drawn using pen.

• the starting line must be below the level of the solvent.

During filtration, the solid that is trapped in the filter paper is called the __________