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Chemical Reactions Review

Total questions: 55

Worksheet time: 2hrs 39mins

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 type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
4.
Ions in two compounds switch. 
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
5.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
6.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
7.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
8.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
9.
C4H12 + O2 → CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
10.
2Pb(NO3)2   -->   2PbO +  4NO2  +  O2
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
11.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

12.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

13.

How many Nitrogen (N) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

14.

How many Hydrogen (H) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

15.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

16.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

17.

To balance an equation you should:

a)

ONLY change subscripts.

b)

ONLY change coefficients.

c)

Change BOTH subscripts and coefficients.

18.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
19.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
20.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
21.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
22.
Which of the following reactions is balanced?
a)
2CH4 + O2 -> CO2 + H2O
b)
CH4 + 2O2 -> CO2 + H2O
c)
CH4 + 2O2 -> CO2 + 2H2O
d)
None of the chemical equations are balanced.
23.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
24.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
25.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
26.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
27.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
28.
Which number should go in the blank?
2 Na+ _ Cl2 -> 2 NaCl
a)
1
b)
2
c)
3
d)
0
29.

Review the image here. Which type of equation- balanced or unbalanced, accurately follows the Law of Conservation of Mass?

a)

Balanced Equations

b)

Unbalanced Equations

30.
Evidence of a chemical reactions is anything that shows - 
a)
a new substance has formed
b)
a solid dissolved in a liquid
c)
interaction between 2 gases
d)
a change in the state of matter
31.
You know you a chemical reaction has occurred if 
a)
there is a precipitate.
b)
there is a color change.
c)
there is a temperature change.
d)
All of these answers are evidence.
32.

Based on the activity series, what are the predicted products of this reaction?

Br2 (l) + KI (aq) →

a)

KBr + I2

b)

KBr + I

c)

KBr2 + I

d)

No Reaction

33.

Based on the activity series, will this reaction occur?

Au (s) + HCl (l) →

a)

AuCl + H

b)

No Reaction

c)

AuCl + H2

d)

Au2Cl + H2

34.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl →

a)

No Reaction

b)

MgCl2 + H2

c)

MgCl2 + H

d)

MgCl + H2

35.

What will be the result of the following:

LiBr + Na --->

a)

Li will replace Na

b)

Na will replace Br

c)

Na will replace Li

d)

no reaction will occur

36.

Predict the results: K + HOH --->

a)

K2OH

b)

KOH + H2

c)

K(OH)2

d)

No Reaction

37.

Which compound is higher in reactivity, Ag or Ca?

a)

Ag

b)

Ca

c)

Neither

d)

They're equal

38.
What do we look at to determine if an element is strong enough to replace another element in a single replacement reaction?
a)
Solubility Rules 
b)
Ionic Charges
c)
It must be insoluble!
d)
Activity Series
39.
What is the state of matter symbol for an insoluble compound?
a)
(s)
b)
(aq)
c)
(g)
d)
(l)
40.

What is the state of matter symbol for a soluble compound?

a)

(s)

b)

(aq)

c)

(g)

d)

(l)

41.

Is NaCl (sodium chloride) soluble or insoluble?

a)

Soluble

b)

Insoluble

c)

Neither

d)

Soluble and Insoluble

42.

Is AgCl (silver chloride) soluble or insoluble?

a)

Soluble

b)

Insoluble

c)

Neither

d)

Both

43.

Zinc carbonate, ZnCO3 is...

a)

Soluble

b)

Insoluble

44.

KBr (potassium bromide) is...

a)

Soluble

b)

Insoluble

45.

Predict the products of the following equation.

MgCl2 + AgNO3 ---->

a)

AgCl(s) + Mg(NO3)2(aq)

b)

No Reaction

c)

AgCl(aq) + Mg(NO3)2(s)

d)

AgCl(s) + MgNO3(aq)

46.

Predict the product(s) of this reaction (Don't worry about balancing the equation)

Pb(NO3)2 + KI →

a)

PbK(s) + INO3(aq)

b)

No Reaction

c)

PbI2(s) + KNO3(aq)

d)

PbI2(aq) + KNO3(s)

47.

Complete the following reaction:

HCl + Mg(OH)2 -->

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

48.

Select the particle drawing for 2 H2O2\ H_2O  

a)
b)
c)
d)
49.

Select the particle drawing for 3 CO23\ CO_2  

a)
b)
c)
d)
50.

Select the particle drawing for N2N_2  

a)
b)
c)
d)
51.

Select the particle drawing for 3 N23\ N_2  

a)
b)
c)
d)
52.

Is this a balanced equation? H2 + O2 → H2OH_2\ +\ O_2\ \rightarrow\ H_2O  

a)

Yes

b)

No

53.

In this balanced equation, how many H atoms are on the reactant side? 2 H2 + O2 → 2 H2O2\ H_2\ +\ O_2\ \rightarrow\ 2\ H_2O  

a)

1

b)

2

c)

4 

54.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
55.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information

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