Separation Techniques

Multiple Choice

What is the method suitable to obtain pure water from seawater.

• Simple distillation

• Fractional distillation

• Filtration

• Evaporation to dryness

Multiple Choice

Which one of the following is the name for separation technique in the picture below

• distillation
• dissolving
• evaporation
• decanting

Multiple Choice

Which one of the following is a disadvantage of evaporation?

• It always requires heat
• It cannot be used for insoluble solids
• All of the solute is recovered
• The solvent (liquid part) is not recovered

Multiple Choice

Evaporation is a process that removes a...

• solvent (liquid part of solution)
• solute (material that dissolves in the solvent)
• distillate (liquid collected after a solution is distilled)
• impurity

Multiple Choice

Name the separation method that causes wet clothes on a clothes line to dry

• Chromatography
• Filtration
• Distillation
• Evaporation

Multiple Choice

True or false: Magnets can be used to separate iron filings from sand

• True

• False

Multiple Choice

Name the separation technique

• Filtration

• Evaporation

• Distillation

• Separation

Multiple Choice

Filtration can be used to separate...

• an insoluble solid from a solution

• a soluble solid from a solution

• a dissolved solid from a solution

Multiple Choice

The change of a liquid to a gas to remove solvent and collect solute is called

• Decantation

• Filtration

• Evaporation

• Centrifuge

Multiple Choice

Decanting is used to separate...

• an insoluble solid from a solution.

• a soluble solid from a solution.

Multiple Choice

The diagram shows the apparatus for separating soil and water. What are the labelled parts?

• A = distillate, B = filtrate
• A = filtrate, B = residue
• A = residue, B = filtrate
• A = residue, B = distillate

Multiple Choice

A substance will expand when it is...

• heated

• cooled

Multiple Choice

What method is shown in the picture?

• Filtration

• Evaporation

• Chromatography

• Sieving

Multiple Choice

Sand is...

• soluble (can dissolve)

• insoluble (can't dissolve)

Multiple Choice

A gas looses energy and turns to a liquid. What is this called?

• melting

• freezing

• condensation

• evaporation

Multiple Choice

What is the name of this separation technique?

• Simple distillation

• Fractional distillation

• Boiling

• Evaporation

Multiple Choice

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.

Multiple Choice

What is the physical property on which fractional distillation depends?

• different boiling points

• different melting points

• different solubilities

• different densities

Multiple Choice

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.

Multiple Choice

Which separation technique is used to obtain salt from seawater?

• Simple distillation

• Filtration

• Chromatography

• Evaporation

Multiple Choice

Which ink is a mixture?

• Blue

• Red

• Yellow

• Black

Multiple Choice

Dyes in water soluble markers may be separated by means of

• Simple distillation

• Crystallisation

• Chromatography

• Filtration

Multiple Choice

The image shows a mixture of concrete nails and saw dusts. What technique is best to use to separate the nails from the saw dusts?

• sieving

• chromatography

• decantation

• magnetic separation

Multiple Choice

Which tool could you use to separate large and small particles?

• A sieve

• A distillation flask

• Chromatography

• Evaporating basin

Multiple Choice

Solutions are made up of...?

• Solutes and insolubles

• Solubles and solutes

• Solutes and solvents

• Solubles and solvents

Multiple Choice

Which part of a filtration is the "filtrate"?

• The filter paper

• The solid material left in the funnel

• The liquid that has gone through

• The conical flask

Multiple Select

What is mixture?

• A mixture is a physical combination of two or more substances.

• A mixture is a chemical combination of only one substance.

• In it the substances retain their individual properties and can be separated by physical means.

• In it the substances do not retain their individual properties and can be separated by chemical means.

Multiple Select

What are homogenous mixtures?

• In homogenous mixtures the components are evenly distributed.

• In homogenous mixtures the components are not evenly distributed.

• They are distinguishable from each other.

• They are not distinguishable from each other.

Multiple Choice

In a heterogeneous mixture, the components are not uniformly distributed throughout and they remain distinct.

• True

• False