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Unit 4 Practice Test/Study Guide - Matter: Chem prop and change

Total questions: 100

Worksheet time: 25hrs 0mins

Name
Class
Date
1.
Which of the following chemical formulas represents a compound? 
a)
C3
b)
O2
c)
CH3CHO
d)
H2
2.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
3.

Substances that have only one kind of atom are called:

a)

elements

b)

nitrogen

c)

electrons

d)

nucleus

4.

The smallest piece of an element:

a)

quark

b)

electron

c)

shell

d)

atom

5.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
6.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
7.
What is the term for combining 2 or more atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
8.
What is the term for combining 2 or more DIFFERENT atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
9.
Are these molecules also compounds?
a)
YES
b)
NO
10.
Are these molecules also compounds?
a)
YES
b)
NO
11.

This picture represents which of the following?

a)

Element

b)

Compound

12.

This picture represents which of the following?

a)

Element

b)

Compound

13.

What is formed from combining of 2 or more different atoms together?

a)

atoms

b)

elements

c)

compound

14.

All types of matter are made up of _____.

a)

atoms

b)

elements

c)

molecules

d)

compounds

15.

The chemical bond between a non-metal and another non-metal will be a ________ bond.

a)

metal

b)

ionic

c)

covalent

d)

polar

16.

The chemical bond between a metal and a non-metal will be a _____ bond.

a)

metal

b)

ionic

c)

covalent

d)

polar

17.

MgO

a)

ionic

b)

covalent

c)

metallic

18.

NaCl

a)

ionic

b)

covalent

c)

metallic

19.

If two fluorine atoms bond they will make a _____ bond.

a)

ionic

b)

covalent

c)

metallic

20.

Which of these element pairs would bond covalently?

a)

Fr and K

b)

Sc and O

c)

F and Cl

d)

He and Pt

21.

Sodium and Bromine will make a _____ bond.

a)

ionic

b)

covalent

c)

metallic

22.

Carbon and Oxygen will make a ___________ bond.

a)

ionic

b)

covalent

c)

metallic

23.

Nitrogen and Oxygen will make a ____________ bond

a)

ionic

b)

covalent

c)

metallic

24.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
25.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
26.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
27.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
28.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
29.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
30.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
31.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
32.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
33.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
34.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
35.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
36.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
37.

What is a chemical reaction?

a)

a change in matter when the molecules rearrange to make new molecules

b)

a change in matter when matter changes its form or appearance

c)

a change in matter when the physical appearance changes

d)

a very boring change in matter

38.

The reactants in the image above are:

a)

CH4 and 2 O2

b)

2 H2O and CO2

c)

All of these are reactants

d)

All of these are products

39.

The products in the image above are:

a)

CH4 and 2 O2

b)

2 H2O and CO2

c)

All of these are reactants

d)

All of these are products

40.

When energy like heat and light are given off in a chemical reaction it is called

a)

exothermic

b)

endothermic

c)

eccentric

d)

ectomorphic

41.

When energy is absorbed and taken in during a chemical reaction it is called

a)

exothermic

b)

endothermic

c)

eccentric

d)

ectomorphic

42.

Signs of a chemical change could be:

a)

a change in energy (temperature, light, sound)

b)

a precipitate forms (a solid forms from 2 liquids)

c)

formation of gas (bubbles)

d)

shocking change in color

e)

all of these answers are signs of chemical change

43.

The products are:

a)

molecular oxygen and 2 carbon

b)

2 carbon monoxide

c)

all of these are products

d)

all of these are reactants

44.

The reactants are:

a)

molecular oxygen and 2 carbon

b)

2 carbon monoxide

c)

all of these are products

d)

all of these are reactants

45.
a new substance formed in a chemical reaction
a)
reactants
b)
products
46.
On the left side of a chemical reaction are the ....
a)
Reactants
b)
Products
47.
On the right side of a chemical reaction are the ....
a)
Reactants
b)
Products
48.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
49.
Which of these is NOT a sign that a chemical change has occurred? 
a)
A loss of transparency 
b)
An unexpected color change
c)
A temperature change
d)
The formation of a precipitate
50.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
51.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
a)
Reactants
b)
Products
c)
Atoms
d)
Catalysts
52.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
53.
the symbolic representation of a chemical reaction
a)
Long Hand
b)
Short Hand
c)
Electron Configuration
d)
Chemical Equation
54.
a process or reaction in which the system absorbs energy from its surroundings; usually, but not always, in the form of heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
55.
a chemical reaction that releases energy by light or heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
56.

Which of the following 2 are chemical reactions?

a)

sugar dissolving in water

b)

water turning into steam

c)

burning wood

d)

mixing baking soda and vinegar

e)

tearing paper

57.

Reactions that have hydrocarbons (CH4) and oxygen as reactants and carbon dioxide and water as products

a)

Conservation of Mass

b)

combustion

c)

double replacement

d)

decomposition

58.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

59.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

60.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

61.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

62.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

63.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

64.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

65.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

66.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

67.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

68.
A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?
a)
500 grams, because the cheese does not gain or lose mass just because it was melted
b)
499 grams, because some of the cheese evaporates as it melts
c)
502 grams, because the cheese absorbs heat as it melts
69.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
70.
If a reaction starts with a total 75g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 75g of products
c)
a total of 180 g of products
d)
None of the above
71.

Why does this picture demonstrate the Law of Conservation of Mass?

a)

the number of atoms of each element are the same on both sides

b)

they start out separate and end up combined

c)

the same elements are used

d)

it doesn't demonstrate the Law of Conservation of Mass

72.

When a log is burned, what happens to the wood?

a)

The mass stays the same, but becomes smoke and ash.

b)

It disappears.

c)

The mass changes as it goes away.

d)

Nothing. You're imagining things.

73.

The Law of Conservation of Matter

a)

tells how many atoms of an element are contained in one molecule or formula unit.

b)

the starting materials in a chemical reaction

c)

the new substances that are formed in a chemical reaction

d)

A law stating that atoms are not created or destroyed during a chemical reaction.

74.

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

a)

yes

b)

no

75.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

76.

The coefficient in 3H2O is

a)

6

b)

5

c)

2

d)

3

77.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
78.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
79.
What is the part of the chemical equation in green called? 
Fe + S --> FeS
a)
products
b)
reactants
c)
yield
d)
chemical formula
80.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
81.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
82.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
83.

Balance the following equation:

___ H2+ ___ O2→___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

84.

Balance the following equation:

___ Mg+ ___ O2→___ MgO

a)

1, 1, 3

b)

2, 1, 2

c)

1, 2, 1

d)

2, 2, 2

85.

Balance the following equation:

___ SeCl6+ ___ O2→___ SeO2+____Cl2

a)

1, 1, 1, 3

b)

2, 1, 2, 1

c)

1, 2, 1, 2

d)

2, 2, 2, 4

86.
Ammonia has a pH of 12.  Ammonia is __________.
a)
an acid
b)
a base
c)
an element
d)
a metal
87.
Soap is a weak base.  What is true about the taste of bases?
a)
they taste sour
b)
they taste sweet
c)
they taste bitter
d)
they taste salty
88.
When dissolved in water, bases produce:
a)
acids
b)
salts
c)
hydrogen ions
d)
hydroxide ions
89.
Which of these solutions is an acid?
a)
Dish Soap: pH of 12
b)
Tomato Soup: pH of 4
c)
Baking Soda: pH of 9
d)
Drain Cleaner: pH of 14
90.
The pH of vinegar is 2.5.  Vinegar is a _____________.
a)
strong acid
b)
strong base
c)
weak base
d)
weak acid
91.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
92.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
93.
Which statement is true when acids and bases are mixed together?
a)
acids become stronger
b)
bases become stronger
c)
there is no change
d)
they neutralize each other
94.
Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is.  Which of these pH values would be a strong acid?
a)
2
b)
6
c)
9
d)
13
95.
What is the pH of water?
a)
0
b)
4
c)
7
d)
14
96.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
97.
What is the pH of a neutral substance?
a)
0
b)
5
c)
7
d)
10
98.
Which of these pH values would indicate that a solution is a weak base?
a)
4
b)
5.6
c)
8
d)
13
99.
When dissolved in water, acids produce:
a)
bases
b)
salts
c)
hydrogen ions
d)
hydroxide ions
100.
Any substance that produces hydroxide ions in water is known as _____________.
a)
an acid
b)
a hydrogen ion
c)
a base
d)
a neutral

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