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Pure Substances and Mixtures: Review

Total questions: 26

Worksheet time: 18mins

Name
Class
Date
1.

What are two the two types of mixtures?

a)

elements

b)

compounds

c)

heterogenous

d)

homogenous

2.

A pure substances ________ be broken down into simpler matter using physical methods.

a)

sometimes

b)

can

c)

can not

3.

Why kind of mixture is this? All parts of the mixture are visible because they do not mix together.

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

4.

Why kind of mixture is this? Compounds cannot be distinguished from each other.

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

5.

Why kind of mixture is this?

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

6.

Why kind of mixture is this? (the sugar in the tea)

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

7.

Why kind of mixture is this?

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

8.

Why kind of mixture is this?

a)

Heterogeneous

b)

Homogenous

c)

Element

d)

Compound

9.
What is a mixture?
a)
A chemical combination of two or more different substances.
b)
A physical combination of two or more different substances.
c)
A chemically pure substance.
d)
A special type of solution
10.
What is a solution?
a)
A type of homogeneous mixture
b)
A type of heterogeneous mixture
c)
A type of suspension
d)
A type of colloid
11.
What is a colloid?
a)
A special type of solution
b)
A homogeneous mixture of  particles that can  be seen distributed in a substance   
c)
A heterogeneous mixture, in which the particles eventually settle out of a substance
d)
A heterogeneous mixture of very small particles (too small to be seen) distributed throughout another substance
12.
What type of mixture can you separate back into its original components?
a)
A solution
b)
A heterogeneous mixture
c)
A suspension
d)
 All of the above
13.

SEA WATER is an example of:

a)

solution

b)

colloid

14.

LEMONADE is an example of:

a)

solution

b)

colloid

15.

SMOKE is formed when solid particles of ash are suspended in the air. This is an example of a:

a)

solution

b)

colloid

16.

The "BEST MIXED" of all mixtures is

a)

colloid

b)

solution

c)

heterogeneous

d)

element

17.

Which is a colloid?

a)

Air

b)

Rice in water

c)

Fog

d)

Rain water

18.

Which one is a colloid?

a)

sea water

b)

air

c)

river water

d)

milk

19.

which one is a suspension?

a)

oil in water

b)

soapy water

c)

air

d)

brass

20.

Which is True?

a)

Suspensions do not settle

b)

suspension settle

c)

colloids settle

d)

Solutions settle

21.

Which of the following would result in being able to dissolve a greater amount of solid in a solution?

a)

Lower the temperature.

b)

Decrease the pressure of the solution.

c)

Increase the pressure of the solution.

d)

Heat the solution.

22.

Which one of these is considered a SOLUTE?

a)

Salt

b)

Water

c)

Salt Water

23.

What are the factors that affect solubility?

a)

rate of stirring

b)

particle size

c)

temperature

d)

all of these

24.
Stirring the solution increases or decreases the solubility?
a)
increases
b)
decreases
25.

What combination would dissolve a solid solute the fastest?

a)

high temperature, no stirring

b)

no heat, no stirring

c)

sugar cube, no heat

d)

high temperature, stirring

26.

Why do sugar particles dissolve faster in hot water?

a)

water particles move slow

b)

water particles move fast

c)

water particles settle down

d)

water particles stay on top