Separating Mixtures

Sand and gravel may be separated from each other through using..

• a filter funnel
• a sieve
• an evaporating basin
• a distillation

Which of the following pairs of substances may best be separated through distillation

•  sand and soil
• water and soil
• salt and sand
•  water and alcohol

Which one of the following techniques would best be used to separate soil and water?

• crystallization

• distillation

• Filtration

• Chromatography

Name the separation technique used to recover the salt from seawater.

• evaporation

• distillation

• filtration

• decanting

Sodium chloride (table salt) can be separated from rock salt by first adding water to the mixture to dissolve the sodium chloride. The separation then takes place in two stages:

• evaporation followed by filtration

• distillation followed by decanting

• filtration followed by evaporation

• filtration followed by decanting

Two or more substances mingled together, but not chemically combined are known as a __________

• residue

• solution

• distillate

• mixture

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as ____________

• decanting

• evaporation

• loading

• chromatography

In a coffee machine, the ground coffee is separated from the coffee solution by using..

• sand paper

• filter paper

• toilet paper

• tissue paper

Which one of the following would you use to separate sand from iron filings?

• a bar magnet
• filter paper
• chromatography paper
• alum

Water and alcohol are easily separated by distillation because of their ______________

• different melting points

• different colours

• different densities

• different boiling points