Separating Techniques

What is a substance that is dissolved in another substance? 

• Solution

• Solute

• Solvent

• Compound

Dyes in water soluble markers may be separated by means of..

• evaporation

• distillation

• chromatography

• filtration

The diagram shows the chromatogram for four colouring inks and that for a black ink. What dye(s) are contained in the black's ink?

• Blue ink

• Red ink

• Yellow ink

• Green ink

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 = distillate

• A = residue, B = filtrate

Which separation technique uses the apparatus shown in the diagram?

• Distillation

• Evaporation

• Paper chromatography

• Filtration

Sawdust is not soluble in water. James dropepd some particles of sawdust into a glass of water by accident. Which technique should he use to separate them from water?

• Distillation

• Evaporation

• Filtration

• Magnetic attraction

Iron and copper screws could be separated using a magnet because..

• iron is magnetic, copper is not

• copper is magnetic, iron is not

• neither metal is magnetic

• copper screws are heavier than iron and fall off the magnet

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

• distillation

• filtration

• paper chromatography

• evaporation

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

• Paper chromatography

• Distillation

• Filtration

• Evaporation

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

• It boils at 100^oC.

• It is coloureless.

• It leaves no residue when filtered.

• It is odourless.