Mixtures and Separating Mixtures

1.

Multiple Choice

45 sec

1 pt

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

a filter funnel

a sieve

an evaporating basin

a distillation

2.

Multiple Choice

45 sec

1 pt

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

3.

Multiple Choice

1 min

1 pt

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

Decanting

distillation

Filtration

Chromatography

4.

Multiple Choice

30 sec

1 pt

Which one of the following solids is insoluble in water?

sugar

sand

copper sulfate

salt

5.

Multiple Choice

45 sec

1 pt

Name the separation technique shown in the diagram.

evaporation

distillation

filtration

decanting

6.

Multiple Choice

30 sec

1 pt

Sodium chloride 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

7.

Multiple Choice

1 min

1 pt

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

residue

solution

distillate

mixture

8.

Multiple Choice

45 sec

1 pt

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

9.

Multiple Choice

45 sec

1 pt

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

A = residue, B = distillate

A = residue, B = filtrate

A = filtrate, B = residue

A = distillate, B = filtrate

10.

Multiple Choice

45 sec

1 pt

In the process of evaporation, which one of the following pieces of laboratory apparatus would NOT be used?

filter funnel

bunsen burner

evaporating basin

wire gauze

11.

Multiple Choice

1 min

1 pt

Which one of the following methods is used to separate the colours in food dyes?

winnowing

Threshing

Crystallization

chromatography

12.

Multiple Choice

45 sec

1 pt

The separation technique shown in the diagram is

fractional distillation

centrifugation

filtration

chromatography

13.

Multiple Choice

45 sec

1 pt

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

sand paper

filter paper

toilet paper

tissue paper

14.

Multiple Choice

45 sec

1 pt

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

crystallization

sublimation

chromatography

sedimentation

15.

Multiple Choice

1 min

1 pt

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

a bar magnet

filter paper

chromatography paper

alum

16.

Multiple Choice

30 sec

1 pt

Water and alcohol are easily separated by distillation because of their

different melting points

different colours

different densities

different boiling points

17.

Multiple Choice

45 sec

1 pt

The diagram shows the chromatogram for three colouring dyes and that for a brown marker. What dye(s) are contained in the marker's ink?

purple and green

purple and yellow

purple only

green and yellow

18.

Multiple Choice

1 min

1 pt

Which one of the following is NOT a mixture?

Sugar

Paint

Crude oil

Air

19.

Multiple Choice

45 sec

1 pt

Liquids that do not mix may be separated by using..

an evaporating dish

a separating funnel

a loading

a sedimentation

20.

Multiple Choice

30 sec

1 pt

Salt and water are

compound

mixture

element

solute

21.

Multiple Choice

30 sec

1 pt

A process in which a liquid changes in to vapor or gas by boiling throughout is called

Fractional distillation

filtration

distillation

evaporation

22.

Multiple Choice

30 sec

1 pt

A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called

Fractional distillation

filtration

crystallization

evaporation

23.

Multiple Choice

30 sec

1 pt

When different gases are mixed together to form air there is

chemical reaction

decomposition

no physical reaction

no chemical reaction

24.

Multiple Choice

1 min

1 pt

Solid particles which are left on filter paper while filtration is called

filtrate

residue

solvent

solute

25.

Multiple Choice

1 min

1 pt

Boiling point is a point at which liquid turns in to..

solid

liquid

molten

gas

26.

Multiple Choice

1 min

1 pt

Iron fillings can be separated from iron and Sulphur mixture by

sedementation

heating

magnetic attraction

seiving

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