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Chem Equations & Types of Reactions Test Review

Total questions: 84

Worksheet time: 2hrs 26mins

Name
Class
Date
1.
Balance this reaction: ____ HCN + ____ CuSO4 ---->____ H2SO4 + ____ Cu(CN)2
a)
2,1,1,2
b)
2,1,1,1
c)
1,2,2,1
d)
1,2,1,1
2.
Balance this reaction: ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF
a)
1,1,1,1
b)
1,2,1,1
c)
2,1,1,2
d)
2,1,2,1
3.

Classify this reaction

4Fe + 3O2 --> 2Fe2O3

a)

Synthesis

b)

Decomposition

c)

Double Replacemnt

d)

Single Replacement

4.

Classify this reaction

ZnCl2 + LiOH → Zn(OH)2 + LiCl

a)

synthesis

b)

single replacement

c)

neutralization

d)

double replacement

5.

Which substance is insoluble in water?

a)

MgS

b)

BF3

c)

Sr(OH)2

d)

MgOH

6.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
7.

Name the type of reaction, the products, balanced coefficients.

3KOH + H3PO4 -->

a)

Synthesis, K3PO4 & H2O, 3,1,1,2

b)

Decomposition, K3PO4 + 3H2O, 3,1,1,3

c)

Single displacement, K3PO4 & H2O, 3,1,1,2

d)

Double displacement, K3PO4 + 3H2O, 3,1,1,3

8.

Name the type of reaction, the products, balanced coefficients.

Ca + AlCl3 -->

a)

Synthesis, CaAlCl3, 1,1,1

b)

Decomposition, CaCl2 + Al, 3,2,3,2

c)

Single replacement, CaCl2 + Al, 3,2,3,2

d)

Double replacement, CaCl2 + AlCl3, 3,2,3,3

9.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
10.
3Mg + N2 --> Mg3N2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
11.
2Fe + 3H2SO4 --> Fe2(SO4)3 + 2H2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
12.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
13.
P4 + 3O2 --> 2P2O3
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
14.

Name the type of reaction, the products, balanced coefficients.

CaCO3 -->

a)

synthesis, Ca + CO3 , 1,1,1

b)

synthesis, Ca + CO2 , 1,1,1

c)

decomposition, Ca + CO3 , 1,1,1

d)

decomposition, CaO + CO2 , 1,1,1

15.
What is a reactant?
a)
a volatile chemical
b)
a dangerous substance
c)
the substances you start with in a chemical reaction
d)
the substances that are formed by a chemical reaction 
16.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of  atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
17.
What mathematical function do coefficients perform in a balanced equation?
a)
addition
b)
subtraction
c)
multiplication
d)
division
18.

Balancing the following:

____ Al + ____ HCl → ____ AlCl3 + ____ H2

a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
19.

Balance the following:

____ H2SO4 + ____ NaNO2 → ____ HNO2 + ____ Na2SO4

a)
1,1,2,1
b)
1,2,2,1
c)
2,3,3,2
d)
4,3,2,1
20.

Which type of reaction is:

2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH

a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
21.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
22.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
23.

Which type of reaction is:

C7H16 + 10 O2 → 7 CO2 + 8 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
24.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H2O

25.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
26.
Ca(OH)2 yields CaO + H2O
1. Balance the equation
2. What type reaction is this?
a)
1:1:1
Synthesis
b)
1:1:1 
Double Replacement
c)
1:1:1
Decomposition
d)
1:2:1
Decomposition
27.
What symbol is used to indicate a heated reaction?
a)
Triangle
b)
Square
c)
Circle
d)
fire
28.
The down arrow in a reaction equation represents which of the following being produced?
a)
Precipitate
b)
Gas
c)
Snow
d)
Magic
29.
What does aq mean in a chemical reaction?
a)
aqua dancing
b)
aqua lungs
c)
aqualirious
d)
aqueous
30.

Which part of the equation do you change to balance an equation?

a)

Coefficients

b)

Subscripts

c)

Superscripts

d)

Arrows

31.
Balance this reaction: ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF
a)
1,1,1,1
b)
1,2,1,1
c)
2,1,1,2
d)
2,1,2,1
32.

What are the coefficients for:

Ca + N2 --> Ca3N2

a)

3,1,1

b)

1,1,2

c)

1,2,1

d)

1,1,3

33.
Which is the correct formula for the compound formed between beryllium and nitrogen?
a)
BeN
b)
Be3N
c)
Be3N2
d)
Be2N3
34.
Which is the correct formula for the compound Chromium (II) Nitrate?
a)
Cr2NO3
b)
(Cr)2NO3
c)
CrNO2
d)
Cr(NO3)2
35.
What kind of reaction is this:
 CaCO3 + Ag2SO4 → CaSO4 + Ag2CO3 
a)
Decomposition
b)
Single Replacement
c)
Double Replacement
d)
Combustion
36.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
37.

Why does the number of Carbon atoms need to be the same on both sides of the reaction?

a)

In a chemical reaction, no new atoms can be made

b)

Because the number of Oxygen atoms must be balanced with the number of Carbon and Hydrogen atoms

c)

Because the coefficients and the subscripts need to be equal

d)

It does NOT need to be the same

38.

What coefficient should go in the last blank space in order for the equation to be balanced?

a)

1

b)

2

c)

3

d)

4

39.

What does the Law of Conservation of Mass state?

a)

No new substances can be made or destroyed

b)

No new compounds can be made or destroyed

c)

No new atoms can be made or destroyed

d)

Mass cannot be lost from a physical reaction

40.
What are the products of this reaction?
Cu+ AgNO3--> 
a)
Cu(NO3)2+Ag
b)
CuNO3 + Ag
c)
CuAg+NO3
d)
Cu+ AgNO3
41.

Write a Balanced Equation for this reaction:

C2H4 + O2 -->

a)

C2O2 + H4

b)

CO2 + HOH

c)

CO + H

d)

2 CO2 + 2H2O

42.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
43.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
44.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
45.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
46.

Predict the products of this synthesis reaction: H2 + Cl2 →

a)

HCl

b)

H2Cl2

c)

H2Cl

d)

HCl2

47.

Complete and balance this equation


Na2CO3 + AlCl3 -->

a)

3 Na2CO3 + 2 AlCl3 --> 2 Na3Al + 3 Cl2CO3

b)

Na2CO3 + AlCl3 --> Na2Cl3 + AlCO3

c)

Na2CO3 + AlCl3 --> NaCl + AlCO3

d)

3 Na2CO3 + 2 AlCl3 --> 6 NaCl + Al2(CO3)3

48.
According to the activity series, which of the following single replacement reactions can occur?
a)
Ca + Al2(SO4)3
b)
Fe + NaOH
c)
Ni + MgSO4
d)
Al + KOH
49.

Predict the products for this equation.

(Zn with a charge of +2)

Zn + H2SO4 -->

a)

Zn(SO4)2 + H

b)

ZnSO4 + H2

c)

ZnSO4 + H4

50.

Predict the products for the this Single Replacement reaction:

K + HCl →

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

HCl + K2

51.

Complete the balanced equation for this Double Replacement reaction.

3 NaOH + Fe(NO3)3 →

a)

NaFe + OH(NO3)3

b)

NaNO3 + Fe(OH)3

c)

3 NaNO3 + Fe(OH)3

d)

3 NaFe + 3 (OH)NO3

52.

Predict the products for the this Single Replacement reaction.

Mg + CuCl →

a)

MgCl2 + Cu

b)

Mg + Cu

c)

MgCu + Cl2

d)

MgCl + Cu2

53.

What are the products of this reaction:

C2H4 + O2 →

a)

C2O2 + H4

b)

CO2 + H2 + O2

c)

CO + H

d)

CO2 + H2O

54.

Predict the products of this single replacement reaction: Na + H2O →

a)

NaO + H2

b)

NaOH + H2

c)

NaH + O2

d)

ONaH

55.

Calcium acetate and sodium carbonate react to form

a)

calcium sodium and carbonate acetate

b)

carbonate calcium and acetate sodium

c)

sodium calcide and calcium acetic

d)

calcium carbonate and sodium acetate

56.
Write a complete reaction for the following.
Solid iron (III) oxide decomposes.
a)
2 Fe2O3 (s) → 4 Fe (s) + 3 O2 (g)
b)
Fe2O3 (s) → 2 Fe (s) + 3 O (g)
c)
2 FeO (s) → 2 Fe (s) +  O2 
d)
Fe3O2 (s) → 3 Fe (s) + O2 
57.
Write a complete reaction for the following.
Nitrogen gas reacts with hydrogen gas.
a)
N2 (g) + 3 H2 (g) → 2 NH3 (g)
b)
N2 (g) + 4 H2 (g) → 2 NH4 (g)
c)
N (g) + H (g) → NH (g)
d)
N2 (g) + H2 (g) → 2 NH (g)
58.
Write a complete reaction for the following.
Solid magnesium oxide reacts with gaseous carbon dioxide.
a)
MgO (s) + CO2 (g) → MgCO3 (s)
b)
Mg2O2 (s) + 2 CO2 (g) → 2 MgCO3 (s)
c)
MgO (s) + CO (g) → MgCO2 (s)
d)
MgO2 (s) + CO2 (g) → MgCO4 (s)
59.
Write the unbalanced equation for aluminum bromide reacting with rubidium acetate.
a)
AlBr + RbC2H3O2 --> AlC2H3O2 + RbBr
b)
AlBr3 + RbC2H3O2 --> Al(C2H3O2)3 + RbBr
c)
AlBr3 + RbC2H3O2 --> AlRb + BrC2H3O2
d)
AlBr3 + RbC2H3O2 --> AlRb3 + BrC2H3O2
60.
Write the correct unbalanced equation for fluorine reacting with potassium phosphide
a)
F + KP --> K + FP
b)
F2 + K3P --> F2K3 + P
c)
F2 + K3P --> KF + P
d)
F2 + K3P --> KF + P2
61.

Which of the following chemical equations is correct for the word equation:

Solid magnesium is burned in oxygen gas to produce solid magnesium oxide.

a)

Mg + O2→ MgO (aq)

b)

Mg+ O→ MgO (s)

c)

Mg + CO2 → MgO (s) + C

d)

Mg + O2→ MgO (s)

62.

Magneisum reacts with oxygen to form magnesium oxide. The correct word equation is...

a)

A

b)

B

c)

C

d)

D

63.

What is the general reaction scheme for a single replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

CxHy+O2 −> CO2+H2OC_xH_y+O_2\ ->\ CO_2+H_2O

64.

What is the general reaction scheme for a combustion  reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

CxHy+O2 −> CO2+H2OC_xH_y+O_2\ ->\ CO_2+H_2O

65.

What type of reaction is the following:
 BaCl2+2KI −> 2KCl + BaI2BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

66.

What type of reaction is the following:
 3CuS +2Al −> Al2S3+3Cu3CuS\ +2Al\ ->\ Al_2S_3+3Cu 

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

67.

When lead reacts with oxygen, a yellow lead(II) oxide powder is produced.

a)

2Pb + O2 → 2PbO

b)

Pb + O2→ PbO2

c)

Pb2 + O2→ Pb2O

d)

Pb + O → PbO

68.

When hydrogen reacts with sulfur, a smelly gas, ___, is produced.

a)

H2 + S → HS

b)

H2 + S → H2S

c)

H + S→ HS

d)

H + S→ H2S

69.

Sodium phosphate and calcium chloride produce ...

a)

2Na3PO4 + 3CaCl2 --> Ca3(PO4)2 + 6NaCl

b)

2Na3PO4 + 4CaCl2 --> Ca4PO2 + 8NaCl

c)

2NaPO4 + CaCl2 --> Ca(PO4)2 + 2NaCl

d)

3NaPO4 + 2CaCl2 --> Ca2(PO4)3 + 3NaCl

70.

Barium metal and water yields what?

a)

Ba2 --> Ba(OH)2 + H2

b)

Ba2 + 3H2O --> 2 Ba(OH)2 + H

c)

Ba + H2O --> BaOH2 + H

d)

Ba + 2 H2O --> Ba(OH)2 + H2

71.

Calcium oxide and water produces ___.

a)

CaO + H2O --> Ca(OH)2

b)

Ca2O2 + H2O --> Ca(OH)2

c)

CaO + H2O --> CaOH + H2

d)

Ca2O2 + H2O --> Ca(OH)2

72.

Copper and silver sulfate produces ___ and ___. Copper will be oxidized to a 2.

a)

Cu + Ag2SO4 --> CuSO4 + 2Ag

b)

Cu2 + Ag2SO4 --> CuSO4 + Ag

c)

Cu + Ag2S --> CuS + Ag

d)

Cu2 + AgSO4 --> Cu2SO4 + Ag2

73.

Aluminum and oxygen produces __.

a)

4Al + 3O2 --> 2Al2O3

b)

2Al + O --> Al2O3

c)

2Al3 + O2 --> 3Al2O3

d)

Al + O --> AlO

74.
Which types of reactions are essentially opposites of one another?
a)
synthesis and decomposition
b)
combustion and synthesis
c)
single replacement and double replacement
d)
synthesis and single replacement
75.

Which is NOT a sign that a double displacement reaction has occured?

a)

gas may be formed

b)

water may be produced

c)

a precipitate is formed

d)

the coeffients are equal

76.

Hydrogen gas and nitrogen monoxide gas forms water and nitrogen gas.

a)

H2 + NO --> H2O + N2

b)

H + NO --> H2O + N

c)

H2 + N2O3 --> H2O + N2

d)

H + NO --> H2O + N2

77.

Potassium chlorate solid when heated produces potassium chloride solid and oxygen gas.

a)

KClO3 + heat --> KCl + O2

b)

PClO3 + heat --> PCl + O2

c)

KClO3 + heat --> KCl + O

d)

KCl + heat --> KCl + O2

78.

sodium phosphate and calcium chloride produce calcium phosphate and sodium chloride

a)

Na3PO4 + CaCl2 --> Ca3(PO4)2 + NaCl

b)

Na3PO4 + CaCl2 --> Ca4PO2 + NaCl

c)

NaPO4 + CaCl2 --> Ca(PO4)2 + NaCl

d)

NaPO4 + CaCl2 --> Ca2(PO4)3 + NaCl

79.

Aluminum bromide and chlorine gas produce aluminum chloride and bromine gas.

a)

AlBr3 + Cl2 --> AlCl3 + Br2

b)

AlBr3 + Cl --> AlCl3 + Br

c)

Al3Br + Cl --> Al3Cl + Br2

d)

AlBr3 + Cl2 --> AlCl3 + Br

80.

Calcium oxide and water produces calcium hydroxide

a)

CaO + H2O --> Ca(OH)2

b)

Ca2O2 + H2O --> Ca(OH)2

c)

CaO + H2O --> CaOH

d)

Ca2O2 + H2O --> Ca(OH)2

81.

Aluminum and oxygen produces aluminum oxide

a)

Al + O2 --> Al2O3

b)

Al + O --> Al2O3

c)

Al3 + O2 --> Al2O3

d)

Al + O --> AlO

82.

Complete the following reaction:

HCl + Mg(OH)2 -->

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

83.

Complete the following reaction:

H3PO4 + NaOH -->

a)

Na3PO4 + H2O

b)

Na +H2O

c)

Na3PO4 + H2

d)

Na3PO4 + H2O + CO2

84.

What is the balanced chemical equation to describe the reaction that occurs between propane (C3H8) and oxygen gas?

a)

C3H8 (g) + 8O2 (g) → 3CO2 (g) + 8H2O (g)

b)

C3H8 (g) + 4O2 (g) → H2CO3 (g) + CO2(g)

c)

C3H8 (g) + 4O2 (g) → H2CO3 (g) + 4H2O (g)

d)

C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g)

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