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Changes in Matter Test Review

Total questions: 58

Worksheet time: 2hrs 4mins

Name
Class
Date
1.

Which is evidence of a chemical change?

a)

color change

b)

Taking in or producing heat

c)

changing size

d)

changing mass

2.

Does NaCl contain ionic, metallic, or covalent bonds?

a)

ionic

b)

metallic

c)

covalent

3.

What type of reaction is this?

a)

Single Replacement

b)

Double Replacement

c)

Combustion

d)

Synthesis

4.

Is PH3 ionic, covalent, or metallic?

a)

ionic

b)

covalent

c)

metallic

5.

Is the bonding in CO2 ionic, covalent, or metallic?

a)

ionic

b)

covalent

c)

metallic

6.

What is NOT a sign of a chemical reaction

a)

color change

b)

change in shape

c)

Taking in or producing heat

7.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
8.

Which equation is balanced?

a)

PbO2 + 2H2

b)

SO2 + H20 --> H2SO4

c)

2Na + 2H2O --> 2NaOH + H2

9.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
10.

What law governs the balancing of chemical equations?

a)

Law of Energy

b)

Law of Conservation of Matter/Mass

c)

Law of Gravity

d)

Law of Matter Movement

11.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
12.

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

13.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO2
a)
3,1 --> 2,3
b)
3,2 --> 1,1
c)
3,2 --> 2,4
d)
3,2 --> 2,1
14.

What are the coefficients that would properly balance this equation?

__AgNO3 + __H2S --> __Ag2S+ __HNO3

a)

2,1 --> 1,2

b)

1,2 --> 1,1

c)

1,2 --> 1,2

d)

1,2 --> 2,1

15.

What are the coefficients that would properly balance this equation?

__H2 + __S --> __H2S

a)

1,1 --> 1

b)

2,2 --> 2

c)

1,2 --> 1

d)

1,2 --> 2

16.

Is the following equation balanced?

4Fe + 3O2 ---> 2Fe2O3

a)

YES

b)

NO

17.
CaCO3 ----> CaO + CO2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
18.
Pb + FeSO4 ----> PbSO4 + Fe
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
19.
Na3PO4 + 3 KOH ----> 3 NaOH + K3PO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
20.

What type of reaction is the following:
C11H24+17O2−> 11CO2 + 12H2OC_{11}H_{24}+17O_2->\ 11CO_2\ +\ 12H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

21.

Identify the following chemical reaction.

2 NaBr + 1 Ca(OH)2 ----> 1 CaBr2 + 2 NaOH

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

22.
Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?
a)
A chemical reaction produced a solid.
b)
A chemical reaction produced a gas.
c)
No chemical reaction took place.
d)
Only a physical change happened.
23.
Which of the following is NOT an example of a chemical change?
a)
burning match
b)
a car rusting
c)
baking a cake
d)
melting ice
24.
A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction?
a)
Heat is added to the sugar crystals.
b)
The sugar melts and becomes a liquid.
c)
Gas is produced as the sugar turns black.
d)
No evidence of chemical reaction is present.
25.
Which shows evidence that a chemical change has occurred?
a)
slicing potato
b)
apple/potato turns brown
c)
biting apple
d)
peeling apple/potato
26.
Which evidence demonstrates that a chemical change has occurred.
a)
water level rises
b)
water becomes cloudy
c)
gas is produced (bubbles)
d)
tablet dissolves
27.
Which of the following examples shows that a chemical reaction has occurred? 
a)
A rock breaks into smaller pieces when it is struck with a hammer.
b)
Rust forms on a hammer that has been left outside to long. 
c)
A cup of water turns pink when a few drops of red food coloring are added. 
d)
A solid is formed when heat is removed from a sample of water. 
28.
Which two substances are covalent compounds?
a)
C6H12O6 (s) and KI (s)
b)
KI (s) and NaCl (s)
c)
C6H12O6 (s) and HCl (g)
d)
NaCl (s) and HCl (g)
29.
Which compound contains only covalent bonds?
a)
NaOH
b)
Ba(OH)2
c)
Ca(OH)2
d)
CH3OH
30.

Substance made from two or more combined atoms.

a)

subscript

b)

chemical bonds

c)

compounds

d)

superscript

31.

A chemical bond formed between shared atoms.

a)

covalent bond

b)

chemical bonds

c)

compound

d)

ionic bonds

32.

Force that holds together atoms in a substance.

a)

chemical formula

b)

Oxidation number

c)

chemical bonds

d)

superscripts

33.

Tells what elements a compound contains and the

number of those atoms.

a)

subscript

b)

oxidation number

c)

chemical formula

d)

chemical bonds

34.

A chemical bond between oppositely charged ions.

a)

Covalent bonds

b)

Ionic Bonds

c)

Ion

d)

Compound

35.

A positively or negatively charged particle.

a)

covalent bond

b)

ion

c)

oxidation number

d)

subscript

36.

The Law of Conservation of Mass states Matter is NEITHER created nor destroyed.

a)

True

b)

False

37.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
38.

How many oxygen atoms are in this chemical formula?

a)

6 oxygen atoms

b)

2 oxygen atoms

c)

3 oxygen atoms

d)

4 oxygen atoms

39.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same  number of atoms
c)
Same subscripts
d)
Same coefficients
40.
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
41.
24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride
a)
62 
b)
38
c)
24
d)
14
42.
What is the arrow in a chemical equation...
H2 + O --> H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
43.
How many elements does PbNO3 have?
a)
2
b)
3
c)
4
d)
5
44.
How many nitrogen atoms does NH3 have?
a)
1
b)
2
c)
3
d)
4
45.
How many nitrogen atoms does NH3 have?
a)
1
b)
2
c)
3
d)
4
46.
Which equation best represents the law of conservation of mass? 
a)
A
b)
B
c)
C
d)
D
47.
Is this balanced?
2HgO → 2Hg + O2
a)
Yes
b)
No
48.

Is this equation balanced or unbalanced?

CH4 + 2O2--> CO2+ 2H2O

a)

balanced

b)

unbalanced

49.
12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed? 
a)
28 g
b)
4g
c)
30g
d)
12g
50.
Is this equation balanced or unbalanced? 
H2 + O2 --> H2O
a)
balanced
b)
unbalanced
51.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams should reactant B have? 
a)
4g
b)
5g
c)
9g
d)
14g
52.
In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?
a)
17g
b)
2g
c)
7g
d)
None of the above
53.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
54.

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

a)

A

b)

B

c)

C

d)

D

55.

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

a)

A

b)

B

c)

C

d)

D

56.

A student heated a 10 gram sample of a chemical in an open container. A chemical reaction occurred, and the mass of the sample was measured again. The mass of the sample was found to be less than before the reaction. Which of the following best explains the decrease in mass of the sample?

a)

The heat caused the chemical to become less dense.

b)

The reaction gave off more heat than was added.

c)

Some of the lighter particles were destroyed.

d)

Some of the particles escaped as a gas formed.

57.

Which of the following is not a clue that a chemical reaction has taken place?

a)

Changing size

b)

Changing odor

c)

A gas being formed

d)

Formation of a precipitate

58.

An ice cream cone melts in a kid's hand while walking outside on a hot summer day. What is this an example of?

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

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