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Balancing & Types of Reactions

Total questions: 65

Worksheet time: 11hrs 50mins

Name
Class
Date
1.
The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
2.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
3.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
4.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
5.

An element from two compounds switch and form two new compounds. 

a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
6.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
7.
What type a reaction is taking place in this picture?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
8.
4Si   + S8   -->   2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
9.
C4H12 + O2 → CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
10.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
11.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
12.
Balance this equation:
 __Li + __Cl2 -> __LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li +  Cl2 -> 2LiCl
13.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
14.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

15.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

16.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
17.
__NaClO3 --> __NaCl + __O2
a)
2,2,2
b)
2,2,3
c)
3,2,2
d)
1,2,3
18.
Balancing this reaction: ____ CH4 + ____ O2 ---> ____ CO2 + ____ H2O
a)
2,1,3,1
b)
1,2,1,2
c)
1,2,2,1
d)
2,1,1,2
19.
Balance this reaction: ____ NaF + ____ Br2 ---> ____ NaBr + ____ F2
a)
3,1,2,1
b)
1,2,3,4
c)
2,1,2,1
d)
1,2,1,2
20.
What do the coefficients need to be in the following equation in order to be balanced?
_Mg + _Cl2 → _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
21.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
22.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
23.
Balance this equation:
MgCl2 --> Mg4+ Cl2
a)
It's already balanced.
b)
4MgCl2 --> Mg4+ 4Cl2
c)
4MgCl2 --> Mg4+ 5Cl2
24.
_AgNO3 + _Cu →_Cu(NO3)2 + _Ag
a)
2 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 1 Ag
b)
2 AgNO3 + 1 Cu → 1 Cu(NO3)2 + 2 Ag
c)
1 AgNO3 + 2 Cu → 2 Cu(NO3)2 + 1 Ag
d)
3 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 2 Ag
25.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
26.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H2O --> __NaOH + __H2
a)
2,2 --> 2,1
b)
4,4 --> 4,1
c)
1,2 --> 2,4
d)
1,2 --> 2,1
27.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__FeCl3 + __Ca(OH)2 --> __Fe(OH)3 + __CaCl2
a)
4,3--> 2,1
b)
3,2 --> 3,1
c)
2,3 --> 2,2
d)
2,3 --> 2,3
28.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
29.
Balance the equation:
Si(OH)4+NaBr--> SiBr4+NaOH
a)
Si(OH)4+2NaBr--> SiBr4+NaOH
b)
Si(OH)4+4NaBr--> SiBr4+4NaOH
c)
Si(OH)4+NaBr--> SiBr4+4NaOH
d)
Si(OH)4+2NaBr--> SiBr4+2NaOH
30.
__(NH4)3PO4 + __Pb(NO3)4 --> __Pb3(PO4)4 + __NH4NO3
a)
2,1,1,6
b)
1,2,2,3
c)
4,3,1,12
d)
4,2,1,12
31.

MgCl2 represents a/an

a)

Element

b)

Chemical Formula

c)

Subscript

d)

Coefficient

32.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
33.

How many different kinds of elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

34.

How many atoms of Hydrogen are in the following formula?

3C2H6

a)

3

b)

6

c)

9

d)

18

35.

What are the coefficients that will balance the skeleton equation below?

___N₂ + __H₂ → __NH₃

a)

1,3,2

b)

1,2,3

c)

3,2,1

d)

1,2,1

36.

What are the coefficients that will balance the skeleton equation below?

__Sn + __HF → __SnF₂ + __H₂

a)

2,1,1,2

b)

1, 2, 1, 1

c)

2,1,2,1

d)

1,2,1,2

37.
How many total atoms are represented?         4Al2O3
a)
2
b)
8
c)
5
d)
20
38.
The large number in front of a chemical formula or compound is the ___________. 
a)
coefficient
b)
product
c)

subscript

d)
chemical
39.
In every balanced chemical equation, each side of the equation has the same number of ____.  
a)
coefficients
b)
moles
c)
molecules
d)
atoms of each element
40.
When balancing equations what does
 -->
mean?
a)
subscript
b)
equals
c)
it is just an arrow
d)
yield
41.
What is the part of the chemical equation in green called? 
Fe + S --> FeS
a)
products
b)
reactants
c)
yield
d)
chemical formula
42.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
43.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
44.
___________________ are the elements or compounds that are formed in a chemical
reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
45.
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
46.

Which is the name of the kind of solid substance formed in a double replacement reaction from two liquids reacting?  

a)
aqueous 
b)
precipitate
c)
acid
d)
synthesis 
47.
A chemical with this formula C6H12O6 has how many atoms in it?
a)
3
b)
22
c)
24
d)
25
48.
In a chemical reaction the number of atoms always stays the same even if a new substance is formed.
a)
True
b)
False
49.
Atoms don't go away they only move from place to place.
a)
True
b)
False
50.
What two molecules are produced in a combustion reaction?
a)
CO2 + NH4
b)
SiO2 + H2O
c)
H2O + CO2
d)
CO2 + H2O2
51.
What is the coefficient of AgNO3 in this reaction?
_AgNO3 + _H2S →_Ag2S+_HNO3
a)
1
b)
2
c)
3
d)
4
52.
Which of the following can be categorized as a synthesis reaction?
a)
Ba + NaCl →BaCl2 + Na
b)
KNO3→K+ + NO3-
c)
2Li + F2 → 2LiF
d)
HCl + LiNO3 → HNO3 + LiCl
53.
Is the reaction below exothermic or endothermic?
CH4 + 2O2 → CO2 + H2O + heat
a)
exothermic
b)
endothermic
54.

In a chemical equation (l) means...

a)

the chemical is a gaseous state of matter

b)

the chemical is a aqueous state of matter

c)

the chemical is a liquid state of matter

d)

the chemical is a solid state of matter

55.

In a chemical equation (g) means...

a)

the chemical is a gaseous state of matter

b)

the chemical is a aqueous state of matter

c)

the chemical is a liquid state of matter

d)

the chemical is a solid state of matter

56.

In a chemical equation (s) means...

a)

the chemical is a gaseous state of matter

b)

the chemical is a aqueous state of matter

c)

the chemical is a liquid state of matter

d)

the chemical is a solid state of matter

57.

In a chemical equation (aq) means...

a)

the chemical is a gas

b)

the chemical is an aqueous

c)

the chemical is a liquid

d)

the chemical is a solid

58.

In a chemical equation (ppt) means...

a)

the chemical is a gas

b)

the chemical is aqueous

c)

the chemical is a precipitate

d)

the chemical is a solid

59.

A substance that is dissolved in water will have which abbreviation in the chemical reaction equation?

a)

(g)

b)

(l)

c)

(ppt)

d)

(aq)

60.

A chemical that turns into a solid when two liquids react is done so in a double replacement reaction. What abbreviation do we use for this solid in the reaction equation?

a)

(g)

b)

(s)

c)

(ppt)

d)

(l)

61.

The small number behind an element in the chemical formula is the ___________. 

a)
coefficient
b)
product
c)

subscript

d)
chemical
62.

Is the reaction below exothermic or endothermic?

CaCO3 (s) + heat → CaO (s) + CO2 (g)

a)
exothermic
b)
endothermic
63.

What is the purpose of the arrow in a chemical equation?

a)

it serves as an equal sign

b)

separates and shows the reactants convert to the products

c)

shows the reaction goes fast

64.

Why do chemical equations need to be balanced? Which of the following is NOT a correct answer to this question?

a)

It must satisfy the Law of Conservation of Matter.

b)

To show that matter cannot be re-arranged.

c)

The number and kinds of atoms must be the same on both sides of the reaction arrow.

d)

Matter cannot be created or destroyed.

65.

Which of the following is the correct equation for this reaction: Combustion of liquid propane (C3H8).

a)

C3H8 + 5 O2 + heat + spark → 3 CO2 + 4 H2O

b)

C3H8 + 5 O2 heat → 3 CO2 + 4 H2O + spark

c)

C3H8 + 5 O2 + spark → 3 CO2 + 4 H2O + heat

d)

C3H8 + 14 O + spark → 5 CO2 + 4 H2O + heat

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