Separation Techniques Quiz

What is the main purpose of separation techniques?

• To mix substances together

• To change one substance into another

• To separate mixtures into individual components

• To measure the weight of a mixture

Which of the following is an example of a homogeneous mixture?

• Sand and water

• Salad

• Saltwater

• Oil and water

In a heterogeneous mixture, the components are:

• Evenly mixed

• Not evenly mixed

• Chemically bonded

• All dissolved

Which separation technique is used to remove insoluble solids from liquids?

• Evaporation

• Filtration

• Decantation

• Chromatography

What example best illustrates filtration?

• Removing iron filings from sand

• Removing sand from water using filter paper

• Separating oil from water

• Separating cream from milk

Which technique separates a dissolved solid from a liquid by heating?

• Evaporation

• Distillation

• Sieving

• Centrifugation

Obtaining salt from saltwater by heating the water is an example of:

• Filtration

• Decantation

• Evaporation

• Chromatography

Decantation is best used for:

• Separating magnetic materials

• Separating liquids from solids or two immiscible liquids

• Separating particles by size

• Separating substances by boiling points

Which example demonstrates decantation?

• Separating oil from water by pouring off the top layer

• Separating ink colours on paper

• Separating cream from milk by spinning

• Removing sand from water using a sieve

Magnetic separation is used to remove:

• Dissolved substances

• Insoluble solids from liquids

• Magnetic materials from a mixture

• Particles of different sizes