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Revision of Unit 4

Total questions: 117

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

Which of the following are mixtures? (choose 2)

a)

carbon dioxide

b)

soil

c)

diamond

d)

air

2.

Which of the following are pure substances? (choose 2)

a)

chocolate flavoured milk

b)

purified water

c)

vitamin C

d)

soil

3.

Mayonnaise is a mixture containing tiny oil droplets spread throughout vinegar. These two components are:

a)

both gases

b)

soild and liquid

c)

solid and gas

d)

both liquids

4.

Why is mud is a mixture?

a)

Because the soil particles in it are spread throughout water particles and no new substances have been formed.

b)

Because the soil particles in it are mixed together

c)

Because mud can be easily mixed with a wooden stick

d)

Because the soil particles in it are clumped together

5.

Is vinegar a mixture?

a)

Yes because it is made of two substances- water and acetic acid

b)

No because it is made of one substance

c)

No because it is only made of liquid particles

d)

No because it is only made of sour particles

6.

What is a mixture?

a)

It is a combination of two or more substances that keep their identities

b)

It is a combination of two or more substances that reacts to become a compound

7.
Salt and pepper would be an example of a
a)
mixture
b)
solution
8.

This is an example of a

a)

Solution

b)

Mixture

9.

This is a type of mixture where one substance dissolves into another

a)

Solution

b)

Suspension

c)

Compound

d)

Colloid

10.

This tool is used for separating solids from liquids or large particles from fine particles

a)

Hands

b)

Sieve

c)

Boiling water

d)

Evaporation

11.
A material that allows liquids to pass through it, while very small solids remain behind
a)
Filter
b)
Sieve
c)
Funnel
d)
Spoon
12.
Which is true of both Mixtures and Solutions
a)
Molecules are mixed evenly
b)
They can both be separated
c)
Separated by evaporation
d)
Can be separated with a filter
13.

This picture represents which of the following?

a)

element

b)

compound

c)

mixture

14.

Lemonade, coke, and salt water are all examples of _________.

a)

Solutions

b)

Mixtures

c)

Pure Substances

d)

Factors of solubility

15.

A combination of substances that dissolve into one another--they are evenly mixed so that individual parts cannot be seen or separated.

a)

solutions

b)

mixtures

c)

observations

16.

________ is the ability to dissolve in water.

a)

Conductivity

b)

Magnetism

c)

Solubility

d)

Reflectivity

17.

A solution is made when one substance _________ in another.

a)

settles at the bottom

b)

moves

c)

dissolves

d)

is suspended

18.

Which one of the following solids is insoluble (can't dissolve) in water?

a)

sugar

b)

sand

c)

instant coffee

d)

salt

19.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
20.

In a saltwater solution, the salt is the __________.

a)

solvent

b)

molecule

c)

part

d)

solute

21.

In a saltwater solution, the water is the _________

a)

solvent

b)

mixture

c)

combination

d)

solute

22.

Is oil and water a mixture or a solution?

a)

Mixture

b)

Solution

23.

In a mixture, the properties of a substance ______________

a)

do not change

b)

change forms

c)

turn into a liquid

d)

become solid

24.

Mixtures are _________

a)

easily separated

b)

impossible to separate

c)

always solutions

d)

only liquids

25.

When a substance dissolves, that means its particles _________.

a)

spread out evenly

b)

disappear

c)

turn into water

26.

True or false: cold water causes sugar to dissolve more easily than warm water

a)

True

b)

False

27.

Water is the univeral ____.

a)

solute

b)

solvent

c)

solution

28.

solute + solvent =

a)

solution

b)

equation

29.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
30.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
31.

Solutes dissolve quicker if you stir them.

a)

true

b)

false

32.

Define the term soluble.

a)

Can dissolve in water

b)

Cannot dissolve in water

c)

Partially dissolves in water

33.

Define the term insoluble.

a)

Can dissolve in water.

b)

Cannot dissolve in water.

c)

Partially dissolves in water.

34.
When we put a substance in water and stir it to see if it dissolves we are testing for_______________________.
a)
Relative Density
b)
Solubility
c)
Mass
d)
Temperature
35.

What happens when salty water is boiled?

a)

The salt becomes a new compound and water evaporates as it has a low boiling point

b)

The water evaporates and the salt remains in the beaker as it has a high melting point

c)

The water becomes a new compound and evaporates while salt remains in the beaker

d)

The water will disappear and the salt remains in the beaker as it is a solid

36.

Which of the following is a correct statement about distillation

a)

The components of the mixture have different densities

b)

The components of the mixture have different melting points

c)

The components of the mixture have different boiling points

d)

The components of the mixture form a heterogeneous mixture

37.

What is the correct order for obtaining salt from a mixture of sand and salt?

a)

Dissolving in water - filtration – evaporation

b)

Evaporation - filtration - dissolving in water

c)

Filtration - dissolving in water - evaporation

d)

Dissolving in water – evaporation - filtration

38.

The process used to separate heterogeneous mixtures of solids and liquids is called

a)

filtration

b)

crystallization

c)

distillation

d)

chromatography

39.

Name the separation technique shown in the diagram

a)

Filtration

b)

Chromatography

c)

Centrifugation

d)

Distillation

40.

Which are methods of separating dissolved particles from the liquid they are dissolved in?

a)

Filtration, separation funnel, crystallization

b)

Filtration, distillation, crystallization

c)

Evaporation, filtration, crystallization

d)

Evaporation, distillation, crystallization

41.

What separation method is used to separate substances by their boiling point?

a)

Filtration

b)

Evaporation

c)

Crystallization

d)

Distillation

42.

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

a)

crystallization

b)

distillation

c)

Filtration

d)

Chromatography

43.

The process of separating small, insoluble solids from a liquid using a filter

a)

filtration

b)

evaporation

c)

sieving

d)

desalination

44.

The sand that is left on the filter paper is known as

a)

filtrate

b)

semi-permeable

c)

residue

d)

sieving

45.

The process of changing a liquid to a gas is called

a)

evaporation

b)

filtration

c)

sieving

d)

decanting

46.

Insoluble solids like sand and flour can be separated from water by

a)

decanting

b)

sieving

c)

filtration

d)

evaporation

47.

For paper chromatography to work,

a)

the dyes must have different boiling points.

b)

the dyes must have different solubilities in the solvent.

c)

the starting line on the chromatogram must be drawn using pen.

d)

The starting line must be below the level of the solvent.

48.

Which ink is most soluble?

a)

Blue

b)

Red

c)

Yellow

d)

Green

49.

Which ink is a mixture?

a)

Blue

b)

Red

c)

Yellow

d)

Black

50.

Referring to the chromatogram, black ink contains

a)

Blue, red and yellow ink only

b)

Blue, red, yellow and green ink

c)

Blue and yellow ink

d)

Black ink only

51.

What is the separation technique in the picture?

a)

Filtration

b)

Crystallization

c)

Using Funnel

d)

Chromatography

52.

What is the separating technique in the picture?

a)

Evaporation

b)

Sublimation

c)

Chromatography

d)

Filtration

53.

What is the separation technique in the picture?

a)

Evaporation

b)

Centifugation

c)

Decantation

d)

Crystallization

54.

We can separate salt from water using filtration?

a)

True

b)

False

55.

When no more solute dissolves the solution is _________

a)

supersaturated

b)

unsaturated

c)

saturated

d)

supercalifragilisticexpialidocious

56.
A solution is a ________ mixture. 
a)
heterogeneous 
b)
homogeneous 
c)
dumb 
d)
mixed 
57.
Another name for a homogeneous mixture is 
a)
an element.
b)
a solution.
c)
a compound.
58.
To make a solute dissolve more quickly i n a solvent which would you do?
a)
Put it in cold water and stir it
b)
Put it in warm water and stir it
59.
Milk is a 
a)
solution
b)
suspension
c)
colloid
60.
What type of mixture separates upon standing?
a)
Solution
b)
Alloy
c)
Colloid
d)
Suspension
61.

Charcoal powder is insoluble in water. When water is filtered, the charcoal powder becomes the _______.

a)

solute

b)

residue

c)

filtrate

d)

solvent

62.

This process allows the fine flour particles to pass through the holes of the strainer while the bigger impurities remain on the strainer. What is this process called?

(a)  

63.

Which of the following statements is NOT true about the image?

a)

The process is called filtration.

b)

A process known as sedimentation is important to make the separation possible.

c)

The substance that passes through the filter paper is called the filtrate.

d)

This method is used to separate insoluble solids from liquids.

64.

The image shows a mixture of concrete nails and saw dusts. What technique is best to use to separate the nails from the saw dusts?

a)

sieving

b)

chromatography

c)

decantation

d)

magnetic separation

65.

Which technique is shown in the image?

a)

seiving

b)

filtration

c)

decanting

d)

crystallization

66.

True or false: Magnets can be used to separate iron filings from sand

a)

True

b)

False

67.

Name the separation technique

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Separation

68.

True or false: Filtration can be used to separate substances in a solution

a)

True

b)

False

69.

In a salt water solution ...

a)

Salt is the solute and water is the solvent

b)

Salt is the solvent and water is the solute

70.

True or false: Sieving can be used to separate a mixture with two solid components of different sizes

a)

True

b)

False

71.

True or false: Decanting is a technique that can be used to separate a salt water solution

a)

True

b)

False

72.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = distillate, B = filtrate
b)
A = filtrate, B = residue
c)
A = residue, B = filtrate
d)
A = residue, B = distillate
73.

No matter what you do, sand will not dissolve in water, because sand is _________.

a)

dissolved

b)

soluble

c)

insoluble

d)

aqueous

74.

What is the name of this separation technique?

a)

distillation

b)

filtration

c)

evaporation

d)

chromatography

75.
A solution that contains a large amount of solute is best described as 
a)
unsaturated
b)
concentrated
c)
dilute
d)
weak
76.
Filtration can be used to separate...
a)
an insoluble solid from a solution
b)
a soluble solid from a solution
c)
a dissolved solid from a solution
77.
The clear liquid which passes through the filter paper is called
a)
filt
b)
filter
c)
filtrate
d)
filtration
78.
Which one of the following would you use to separate sand from iron filings?
a)
a bar magnet
b)
 filter paper
c)
distillation apparatus
d)
chromatography paper
79.

Which separation technique is shown below

a)

using a magnet

b)

separating funnel

c)

Centrifuging

d)

Chromatography

80.

Which separation technique is shown below

a)

filtration

b)

crystallization

c)

sublimation

d)

evaporation

81.
An example of a mixture is 
a)
Water and oil
b)
Cereal and Milk 
c)
Sand and water 
d)
All of the above
82.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
83.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
84.
In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

a)
stir the powder in the liquid
b)
freeze the mixture
c)
add more powder to the liquid
d)
store the mixture in a dark place
85.
Kool-Aid - Powder, sugar, and water
Identify the solvent 
a)
water
b)
powder
c)
sugar
d)
powder and sugar
86.
When Koolaid mix is light colored and tastes watery it is a _______ solution.
a)
saturated 
b)
diluted
87.
When a Koolaid mix in water is dark in color and very sweet it is a __________ solution.
a)
concentrated 
b)
Diluted
88.
To make a solute dissolve more quickly i n a solvent which would you do?
a)
Put it in cold water and stir it
b)
Put it in warm water and stir it
89.
The concentration of a mixture can be increased in which of the following ways?
a)
Heating the mixture
b)
Adding more water “solvent”
c)
Adding more powder “solute”
d)
Stirring the mixture
90.
When a certain amount of solvent cannot hold any more solute it is called a ________ solution.
a)
Diluted
b)
Saturated
91.
How does a solution become supersaturated?
a)
dissolve lots of solvent in it.
b)
dissolve a little solute in it. 
c)
dissolve more solute than you should be able to. 
d)
dissolve a super amount of solvent in it. 
92.

You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:

a)

saturated

b)

unsaturated

c)

concentrated

d)

warm

93.

How do you know when you have a saturated solution?

a)

You don't see anymore material in the solution. It has dissolved.

b)

The material dissolves and no more will dissolve because you see it collect at the bottom.

c)

The solution is bubbling and cloudy.

d)

The solution is clear and there is nothing at the bottom.

94.
What does it mean to be "Soluble" ?
a)
Capable of being a solid.
b)
To have soul.
c)
Capable of being dissolved.
d)
To sink.
95.
A measure of the amount of solute in a given amount of solvent or solution is...
a)
saturated
b)
solubility
c)
concentration
d)
miscible
96.
A saturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
97.
A supersaturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
98.
An unsaturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
99.
The dissolving medium in a solution is called ... 
a)
colloid
b)
solution
c)
solute
d)
solvent
100.
The substance dissolved in a solution is called ... 
a)
colloid
b)
solution
c)
solute
d)
solvent
101.

This is a type of mixture where one substance dissolves into another

a)

Solution

b)

Miscibility

c)

Compound

d)

Solubility

102.
Which substance is SOLUBLE in water?
a)
sand
b)
oil
c)
salt (sodium chloride)
d)
sulfur
103.
Which substance is INSOLUBLE in water?
a)
salt (sodium chloride)
b)
sugar (sucrose)
c)
oil
d)
copper sulfate
104.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
105.

In a sample of seawater, the solvent is:

a)

water

b)

sea

c)

salt

d)

air

106.

Solutes that dissolve in water can be solids, liquids or gases

a)

true

b)

false

107.

A common gas that we find dissolved in seawater is

a)

krypton

b)

neon

c)

oxygen

d)

carbon tetrachloride

108.

If I want more sugar to dissolve in water, I should heat the water

a)

true

b)

false

109.

If I want more sugar to dissolve in water, I should stir the water

a)

true

b)

false

110.

Which tools are best for separating a mixtures of sand, iron filings, and water?

a)

Hot plate and filter

b)

Tweezers and filter

c)

Filter and magnet

d)

Magnet and hot plate

111.

A cup of orange juice with pulp is poured into a glass. Which of these procedures could be done to separate the juice from the pulp?

a)

pour the juice through a coffee filter

b)

heat the juice in a pot until boiling

c)

pour the juice in another cup

d)

allow the mixture to settle, leaving the pulp at the bottom of the glass

112.

All of these can be separated easily EXCEPT -

a)

nuts, bolts, and screws

b)

powdered drink mix, sugar and water

c)

sand and water

d)

iron filings and sand

113.
What is a mixture?
a)
elements chemically combined
b)
a combination of different things
c)
it is found on the Periodic Table 
d)
it is made of chemical
114.
Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?
a)
A solution
b)
A colloid
c)
A suspension
d)
A compound
115.
A solution that is considered dilute would be....
a)
Dark in color
b)
Have a strong scent
c)
Have a large amount of solute
d)
Have a small amount of solute
116.
The air around was is  a mixture of gases.
a)
True
b)
False
117.

Which substance is INSOLUBLE in water?

a)

salt (sodium chloride)

b)

sugar (sucrose)

c)

oil

d)

copper sulfate

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