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UNIT 4 REVIEW

Total questions: 38

Worksheet time: 30mins

Name
Class
Date
1.
Are made from a combination of 2 or more elements in a constant ratio...
a)
Atome
b)
Mixture
c)
Compounds
d)
Elements
2.
A combination that can be separated by physical processes is a .....
a)
Atom
b)
Compound
c)
Element
d)
Mixture
3.
O2
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
4.
NaCl
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
5.

Water

a)

pure substance

b)

compound

c)

heterogenous mixture

d)

homogenous mixture

6.

rust (Fe2O3)

a)

compound

b)

heterogenous mixture

c)

homogenous mixture

d)

pure substance

7.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
8.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
9.

Which one of these pictures represents a mixture?

a)

The left box

b)

The middle box

c)

The right box

d)

All three of these boxes

10.
Classify the sample
a)
Pure substance
b)
Mixture
11.
Classify the sample
a)
Element
b)
Compound
12.
Classify the Sample. 
a)
Pure Substance
b)
Mixture of Elements
c)
Mixture of Compounds
d)
Mixture of Elements and Compound
13.
Which chemical formula could be represented by this sample?
a)
NaCl
b)
H2
c)
C6H12O6
d)
Cu
14.

In order to show different substances in a particle picture we must...

a)

use parenthesis, tails, or arrows

b)

use different sizes

c)

use different colors or labels

d)

none of the above

15.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
16.
What is happening when my ice cream changes from a solid to a liquid?
a)
freezing
b)
melting
c)
burning
d)
evaporation
17.
Particles of a liquid
a)
are tightly packed together and stay in a fixed position.
b)
have no viscosity.
c)
decrease in volume with increasing temperature.
d)
are free to move around one another but still touch.
18.
The teacher heats a pot of water. Once the water reaches 100°C, which point has the water reached?
a)
Boiling
b)
Melting
c)
Freezing
d)
Evaporating
19.
Substance that consists of one type of atom.  It is a pure substance. Found on the Periodic Table. 
a)
Element
b)
Compound
c)
Mixture
d)
I don't know
20.
What is the boiling point of water?
a)
0oC
b)
100oC
c)
80oC
d)
95oC
21.

How can we separate an insoluble solid from a liquid?

a)

chromatography

b)

evaporation

c)

filtration

d)

condensation

22.
Water and alcohol are easily separated by distillation because of their
a)
different densities
b)
different boiling points
c)
different colours
d)
different melting points
23.
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
24.

Which separation technique is shown below

a)

filtration

b)

crystallization

c)

sublimation

d)

evaporation

25.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
26.
Salt dissolved in water.  
What method would you use to separate this mixture so that you can get the salt AND the water?
a)
sorting by hand
b)
distillation
c)
chromatography
27.
Which technique is shown the diagram below
a)
seiving
b)
filtration
c)
decanting
d)
crystallization
28.

A mixture of water (b.p. 100oC) and alcohol (b.p. 78oC) is separated using distillation. Which will boil out first?

a)

water

b)

alcohol

29.

When you heat up the chemical compound, they will both evaporate at the same time.

a)

True

b)

Maybe

c)

I don’t know

d)

False

30.

Which image is inconsistent with Avogadro's law?

a)

A

b)

B

c)

C

d)

D

31.

Which image would have the formula AB3 ?

a)

A

b)

B

c)

C

d)

D

32.

Which of the following is not a compound?

a)

HCl

b)

Cl2

c)

NaCl

d)

CO2

33.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
34.
Name this compound: H2O
a)
Water
b)
Carbon dioxide
c)
Hydrogen peroxide 
d)
Sulfuric acid
35.
A molecule is
a)
two or more atoms bonded together
b)
one type of atom
c)
smaller than an atom 
d)
an element
36.
(Element or Compound)
       C2H8O 
a)
Element
b)
Letters
c)
Numbers
d)
Compound
37.

This picture represents which of the following?

a)

molecular element

b)

molecular compound

c)

mixture

38.

This picture represents which of the following?

a)

molecular element

b)

molecular compound

c)

element

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