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Chemical Equations and Reactions Unit Test Review

Total questions: 43

Worksheet time: 1hrs 12mins

Name
Class
Date
1.
In this image, the symbols to the right of the arrow (in black) are called the_______.
a)
Products
b)
Reactants
c)
Subscripts
d)
Coefficients
2.
In this image, what are the symbols in red are called the_______.
a)
Products
b)
Reactants
c)
Subscripts
d)
Coefficients
3.
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.
4.

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

a)

2H2 + 2NO --> 2H2O + N2

b)

2H + NO --> H2O + N

c)

H2 + NO --> H2O + N

d)

H2 + NO --> H2O + N2

5.

Sodium phosphate and calcium chloride produce calcium phosphate and sodium chloride

a)

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

b)

2Na3PO4 + 6CaCl2 --> 2Ca4PO2 + 6NaCl

c)

2NaPO4 + 3CaCl2 --> 2Ca(PO4)2 + 6NaCl

d)

2NaPO4 + 6CaCl2 --> 2Ca2(PO4)3 + 3NaCl

6.
Which of the following symbols is not a correct indication of the phase of a substance in a reaction? 
a)
(s)=solid
b)
(g)=grams
c)
(l)=liquid
d)
(aq)= aqueous
7.

Barium metal and water yields barium hydroxide and hydrogen gas

a)

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

b)

Ba2 + 5H2O --> 2Ba(OH)2 + H

c)

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

d)

Ba2 --> Ba(OH)2 + H2

8.

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

a)

2Pb + O2 → 2PbO

b)

Pb + O2→ PbO

c)

2Pb2 + O2→ 2Pb2O

d)

2Pb + O2 → Pb2O2

9.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
10.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
11.
Magnesium can be burned in air to produce solid magnesium oxide.
a)
2Mg(s) + O2(g)→ 2MgO(s)
b)
Mg(s) + O(g) → MgO(s)
c)
2Mg(s) + CO2(g) → 2MgO(s) + C(s)
d)
2Mg(s) + O2(g) → Mg2O2(s)
12.
Sodium reacts with chlorine to produce sodium chloride.
a)
NaCl(s) → Cl(g) + Na(s)
b)
Na(s) + CO2(g) → NaCO2(s)
c)
2Na(s) + Cl2(g) → 2NaCl(s)
d)
Na(s) + Cl(g) → NaCl
13.
Iron reacts with sulfur to produce iron(II) sulfide powder.
a)
2Fe(s) + S(s) → Fe2S(s)
b)
Fe(s) + S(s) → FeS(s)
c)
Fe(s) + S(g) → FeS(s)
d)
4Fe(s) + S2(g) → 2Fe2S
14.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
15.
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.
16.

Which type of chemical reaction has the following configuration?


Substance + Substance --> Compound


A + B --> AB

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

17.

Which type of chemical reaction has the following configuration?


Element + Compound --> Element + Compound


A + BC --> B + AC

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

18.

Which type of chemical reaction has the following configuration?


Hydrocarbon + Oxygen --> Carbon Dioxide + Water


CxHy + O2 --> CO2 + H2O

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

19.

What type of chemical reaction has the following configuration?


Ionic Compound(aq) + Ionic Compound(aq) --> Compound + Compound


AB(aq) + CD(aq) --> AD + BC

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

20.

What type of chemical reaction has the following configuration?


Compound --> Substance + Substance


AB --> A + B

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

21.

What type of chemical reaction is Endothermic and needs heat/energy to take place.

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

22.

Select each compound that can be produced by combustion reactions. (more than 1 answer)

a)

Oxygen

b)

Carbon Dioxide

c)

Water

d)

Glucose

e)

Carbon

23.

Classify the following chemical reaction


BaCl2(aq) + K2CrO4(aq) --> BaCrO4(s) + 2KCl(aq)




a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

24.

Classify the following chemical reaction.


Si(s) + 2Cl2(g) --> SiCl4(l)

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

25.

Classify the follow chemical reaction.


2C6H6(l) + 15O2 --> 6H2O(l) + 12CO2(g)

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

26.

What type of chemical reaction is when a single compound is broken down into two or more products?

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

27.
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
28.
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
29.

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.

30.
Which coefficients are required to correctly balance the equation: 
C2S2 + O2 → CO2 + S2O
a)
1, 2, 3, 2
b)
2, 5, 4, 2 
c)
2, 4, 5, 2
d)
2, 3, 5, 2 
31.

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
32.
Balance the following: Fluorine and Aluminum oxide react to produce Aluminum fluoride and Oxygen
a)
6,2,4,3
b)
3,4,2,6
c)
5,1,3,2
d)
3,2,4,3
33.
What is the generic equation for a double replacement reaction? 
a)
AB + CD ---> AD + CB
b)
AB + CD ---> DA + CB
c)
AB + CD ---> A + BC
d)
AB + CD ---> D + CBA
34.

What do you use to determine the states of matter of the products in a double replacement reaction?

a)

Oxidation Number

b)

Activity Series on formula chart

c)

Solubility Chart

d)

Ionic Charges

35.

What is the state of matter symbol for an insoluble compound?

a)

(s)

b)

(aq)

c)

(g)

d)

(l)

36.

What is a precipitate?

a)

A solid formed from a single replacement reaction

b)

An aqueous compound formed from single replacement reaction

c)

An aqueous compound formed from double replacement reaction

d)

A solid formed from a double replacement reaction of 2 aqueous solutions

37.

Predict the products of this reaction: AgF + KCl --->

a)

This reaction will not occur.

b)

AgCl + KF

c)

AgCl3 + KF2

d)

AgK + ClF

38.

Predict the products of the following equation.

PbCl2 + AgNO3 ---->

a)

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

b)

No Reaction

c)

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

d)

AgCl(s) + PbNO3(aq)

39.

Predict the products of this DR reaction: NaCl + CaO ----->

a)

Na2O + CaCl2

b)

NaCa + OCl2

c)

This reaction will not occur

d)

NaO + CaCl

40.
What  will be the result of the following: 
Br2 + NaF ->
a)
bromine will replace Na
b)
Na will replace Br
c)
Br will replace F
d)
no reaction will occur
41.
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
42.
What will be the result of :  Zn + AuCl2->
a)
ZnCl2 +Au
b)
ZnAu + Cl2
c)
no reaction
d)
ClAu + Zn
43.

What is the balanced reaction for Fe + Na2CO3 ?

a)

Fe + Na2(CO3)2 --> Na2 + Fe(CO3)2

b)

Fe + Na2CO3-->Na + CO3Fe

c)

2Fe + Na2CO3-->2Na + Fe2CO3

d)

No Reaction

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