Junior Cert Science - Chemistry - Separation of Mixtures

Which one of the following is NOT a mixture?
1. sugar
2. paint
3. crude oil
4. air
Which one of the following substances is a mixture?
1. seawater
2. salt
3. water
4. copper
Which one of the following techniques would best be used to separate soil and water?
1. filtration
2. decanting
3. fractional distillation
4. chromatography
In a coffee machine, the ground coffee is separated from the coffee solution by using
1. filter paper
2. toilet paper
3. sand paper
4. tissue paper
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
1. A = residue, B = filtrate
2. A = filtrate, B = residue
3. A = residue, B = distillate
4. A = distillate, B = filtrate
Which one of the following methods would NOT be used to separate an insoluble solid and a liquid?
1. chromatography
2. decanting
3. filtration
4. evaporation
The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as
1. evaporation
2. chromatography
3. decanting
4. sterilisation
In the process of evaporation, which one of the following pieces of laboratory apparatus would NOT be used?
1. filter funnel
2. bunsen burner
3. wire gauze
4. evaporating basin
In the distillation apparatus shown, what are the parts labelled A and B?
1. A = Liebig condenser, B = thermometer
2. A = thermometer, B = funnel
3. A = funnel, B = thermometer
4. A = Liebig condenser, B = flask
Water and alcohol are easily separated by distillation because of their
1. different boiling points
2. different densities
3. different colours
4. different melting points
Miscible liquids that have different boiling points can be separated by
1. distillation
2. filtration
3. chromatography
4. decanting
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:
1. filtration followed by evaporation
2. evaporation followed by filtration
3. filtration followed by decanting
4. distillation followed by decanting
$fract.gif$ The separation technique shown in the diagram is
1. fractional distillation
2. decanting
3. chromatography
4. filtration
Two or more substances mingled together, but not chemically combined are known as a
1. mixture
2. solution
3. distillate
4. residue
Dyes in water soluble markers may be separated by means of
1. chromatography
2. distillation
3. decanting
4. evaporation
Which TWO of the following tecnniques may be used to separate an insoluble solid from a liquid.
Select TWO answers and then click on the Check button.
1. decanting
2. filtration
3. chromatography
4. isolation
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?
1. purple and yellow
2. purple and green
3. green and yellow
4. purple only
Which of the following pairs of substances may best be seperated through distillation?
1. water and alcohol
2. water and soil
3. salt and sand
4. sand and soil
Sand and gravel may be separated from each other through using
1. a sieve
2. a filter funnel
3. a Liebig Condenser
4. an evaporating basin
Liquids that do not mix may be separated by using
1. a separating funnel
2. a filter funnel
3. Liebig condenser
4. an evaporating dish
Liquids that do NOT mix are said to be
1. immiscible
2. miscible
3. soluble
4. flammable
Which one of the following would you use to separate sand from iron filings?
1. a bar magnet
2. filter paper
3. chromatography paper
4. a distillation apparatus
Oil and water may be separated by using
1. a separating funnel
2. a filter funnel
3. a Liebig condenser
4. chromatography paper
Which one of the following solids is immiscible in water?
1. sand
2. sugar
3. salt
4. copper sulfate
Which one of the following methods is used to separate the colours in food dyes?
1. chromatography
2. decanting
3. sieving
4. evaporation
Evaporation is used to
1. obtain the solute from the solution
2. separate the dyes in a marker
3. separate liquids of different boiling points
4. separate solids of different particle size
Name the separation technique shown in the diagram
1. evaporation
2. filtration
3. decanting
4. distillation
Which one of the following is NOT an example of a separation technique?
1. boiling an egg
2. tea strainer
3. fishing net
4. surgical mask
Which one of the following is a disadvantage of evaporation?
1. The solvent is not recovered
2. All of the solute is recovered
3. It always requires heat
4. It cannot be used for insoluble solids
Air is a mixture of
1. gases
2. liquids
3. liquids and gases
4. solids

Junior Cert Science - Chemistry - Separation of Mixtures

Multiple Choice Quiz