Types of Dispersions

The type of dispersion where the particles are larger than those in a solution but not heavy enough to settle out is a :

• heterogeneous mixture

• suspension

• colloid

• compound

Sugar-water is a homogeneous mixture that allows light to pass through.

• True

• False

A suspension is a mixture that contains undissolved particles.

• True

• False

Which of the following is not a colloidal system?

• foam

• aerosol

• gel

• alloy

A(n) ------------------------- is a colloid of two or more liquids.

• emulsion

• aerosol

• mousse

• sol

Fresh orange juice and fresh milk are both suspensions.

• True

• False

Tyndall effect is used to distinguish between:

• solute and solvent

• liquid and gas

• solution and colloid

• suspension and colloid

Suspensions and colloids can be separated by:

• filtration

• centrifugation

• distillation

• decantation

A dispersion that scatters light and can be separated by filtration is a :

• solution

• suspension

• colloid

A white mixture that shows Tyndall effect but allows no decantation:

• becomes colorless after filtration and still shows Tyndall effect

• remains unchanged after filtration

• becomes colorless after filtration and does not show Tyndall effect any more

• becomes brownish after filtration