Free Printable Reactions (Synthesis, Decomposition, & Single-Displacement)

1.

indicates substance is a liquid

a)

g

b)

cr

c)

aq

d)

l

2.

An ending substance that is made during a chemical reaction is called

a)

Reactant

b)

Product

c)

Atom

d)

Molecule

3.

The starting substances of a chemical reaction is called

a)

products

b)

substances

c)

reactants

4.

What are Chemical Reactions?

a)

It's when you mix substances.

b)

a process in which atoms rearrange to form new substances

c)

When something bubbles.

d)

letter and numbers showing the types and number of atoms

5.

Describes the number of atoms in a compound of each element.

a)

coefficient

b)

superscript

c)

subscript

d)

SI unit

6.

Is Fe for iron an element or a compound?

a)

compound

b)

element

7.

Which are the products in the reaction shown?

a)

Al₂O₃

b)

Al

c)

O₂

8.

CaCO₃ represents a chemical

a)

Symbol

b)

Formula

c)

Subscript

d)

Reaction

9.

In the following equation, what are the products?
HCl + Zn → H₂ + ZnCl₂

a)

HCl + Zn

b)

H₂ + ZnCl₂

c)

Zn → H₂

d)

the stuff on the outside

10.

In this image, what are the information in red is called the_______.

a)

Product

b)

Reactant

c)

Chemical Subscript

11.

The symbol for a substance dissolved in water is

a)

(s)

b)

(l)

c)

(g)

d)

(aq)

12.

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

13.

In a ___________change, a substance changes into a different substance.

a)

Physical

b)

Chemical

14.

In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?

a)

Reactants

b)

Products

c)

Atoms

d)

Catalysts

15.

When a chemical reaction happens

a)

bonds must be broken and reformed

b)

chemicals don't collide

c)

atoms keep their arrangements

d)

chemicals keep their same properties

16.

A _________ describes a chemical reaction

a)

chemical equation

b)

chemical symbol

c)

chemical formula

d)

product

17.

What is a chemical reaction?

a)

produces or yields

b)

an attraction between atoms

c)

a process in which one or more substances rearrange to form a new one

d)

state that the identity stays the same before and after

18.

A chemical equation is a description of a reaction using symbols

a)

TRUE

b)

FALSE

19.

Atoms separate, rearrange, and new bonds form in a chemical reaction

a)

FALSE

b)

TRUE

20.

The arrow in a chemical equation separates two or more reactants

a)

FALSE

b)

TRUE

21.

Without balancing the final equation, predict the products for the synthesis reaction: $Li\ +\ Cl_2\ \rightarrow$ ?

a)

$LiCl_2$

b)

$LiCl_{ }$

c)

$Li_2Cl_2$

d)

$Li_2Cl_{ }$

22.

Without balancing the final equation, predict the products for the synthesis reaction: $Mg\ +\ Br_2\ \rightarrow$ ?

a)

$MgBr$

b)

$MgBr_2$

c)

$Mg_2Br$

d)

$Mg_2Br_2$

23.

Without balancing the final equation, predict the products for $Al\ +\ Cl_{2\ }\rightarrow\ ?$

a)

$Al_3Cl$

b)

$AlCl$

c)

$AlCl_3$

d)

$Al_3Cl_2$

24.

Without balancing the final equation, predict the products for the synthesis reaction: $Li\ +\ P_4\ \rightarrow\ ?$

a)

$Li_3P$

b)

$LiP_3$

c)

$LiP_4$

d)

$LiP$

25.

Without balancing the final equation, predict the products for the synthesis reaction: $Al\ +\ S_8\ \rightarrow\ ?$

a)

$AlS_8$

b)

$Al_3S_2$

c)

$Al_3S_8$

d)

$Al_2S_3$

26.

What is the final balanced equation for: $Ca\ +\ F_2\ \rightarrow\ ?$

a)

$Ca\ +\ F_2\ \rightarrow\ CaF_2$

b)

$Ca\ +\ F_2\ \rightarrow\ 2CaF_{ }$

c)

$2Ca\ +\ F_2\ \rightarrow\ 2CaF_2$

d)

$2Ca_{ }\ +\ F_2\ \rightarrow\ Ca_2F_2$

27.

What is the final balanced equation for: $Li\ +\ P_4\ \rightarrow\ ?$

a)

$Li\ +\ P_4\ \rightarrow\ LiP_4$

b)

$4\ Li\ +\ 3\ P_4\ \rightarrow\ 4\ LiP_3$

c)

$4\ Li\ +\ P_4\ \rightarrow\ 4\ LiP_{ }$

d)

$12\ Li\ +\ P_4\ \rightarrow\ 4\ Li_3P$

28.

What is the final balanced equation for: $Na\ +\ Br_2\ \rightarrow\ ?$

a)

$Na\ +\ Br_2\ \rightarrow\ NaBr_2$

b)

$2\ Na\ +\ Br_2\ \rightarrow\ 2\ NaBr$

c)

$Na\ +\ Br_2\ \rightarrow\ 2\ NaBr$

d)

$4\ Na\ +\ Br_2\ \rightarrow\ 2\ Na_2Br$

29.

Write the overall balanced chemical equation for the synthesis reaction: $Sr\ +\ N_2\ \rightarrow\ ?$

a)

$Sr\ +\ N_2\ \rightarrow\ SrN_2$

b)

$Sr\ +\ N_2\ \rightarrow\ Sr_3N_2$

c)

$3\ Sr\ +\ N_2\ \rightarrow\ Sr_3N_2$

d)

$2\ Sr\ +\ N_2\ \rightarrow\ 2\ SrN$

30.

Write the overall balanced equation for the synthesis reaction: $Li\ +\ S_8\ \rightarrow\ ?$

a)

$16\ Li\ +\ S_8\ \rightarrow\ 8\ Li_2S$

b)

$Li\ +\ S_8\ \rightarrow\ LiS_8$

c)

$2\ Li\ +\ S_8\ \rightarrow\ Li_2S_8$

d)

$8\ Li\ +\ S_8\ \rightarrow\ 8\ LiS$

31.

A decomposition reaction can be represented as _____________________.

a)

AB → A + B

b)

A + B → AB

c)

AB + CD → AC + BD

d)

A + BC → B + AC

32.

A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.

a)

single-replacement reaction

b)

synthesis reaction

c)

double-replacement reaction

d)

decomposition reaction

33.

This chemical equation for mercury oxide is an example of what type of reaction?
2HgO → 2Hg + O₂

a)

decomposition reaction

b)

synthesis reaction

c)

combustion reaction

d)

Marvin the Martian reaction

34.

Choose the balanced chemical equation for the formation of iron oxide.

a)

2Fe + O₂→ 2FeO₂

b)

Fe + O₂→ FeO₂

c)

4Fe + 3O₂→ 2Fe₂O₃

d)

4Fe + O₂→ 2FeO₂

35.

A chemical change in which two or more substances react to form a new substance is a ____________________________.

a)

decomposition reaction

b)

synthesis reaction

c)

double displacement reaction

d)

combustion reaction

36.

A synthesis reaction can be represented as ________________________.

a)

AB + CD → AC + BD

b)

AB → A + B

c)

A + B → AB

d)

A + BC → B + AC

37.

This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O₂→ 2MgO

a)

decomposition reaction

b)

synthesis reaction

c)

single displacement reaction

d)

combustion reaction

38.

Which of the following is an example of synthesis?

a)

Na + Br₂--> NaBr

b)

KClO₃--> KCl + O₂

c)

HgO + Cl₂-->HgCl + O₂

d)

Cl₂ + NaBr --> NaCl + Br₂

39.

What is decomposition?

a)

putting substances together

b)

breaking substances apart

c)

element replacing another element in a compoud

d)

burning of a subtance

40.

What type of chemical reaction is this?
Al(OH)₃ → Al₂O₃ + H₂O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

41.

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

42.

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

43.

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

44.

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

45.

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

46.

Which type of reaction is:

2 H₃AsO₄ → As₂O₅ + 3 H₂O

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Combustion

47.

Which of the following is an example of synthesis?

a)

Na + Br₂--> NaBr

b)

KClO₃--> KCl + O₂

c)

HgO + Cl₂-->HgCl + O₂

d)

Cl₂ + NaBr --> NaCl + Br₂

48.

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

a)

1,3,3,1

b)

1,3,2,1

c)

2,3,3,1

d)

1,1,3,1

49.

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

50.

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

51.

When balancing equations, the rule is that you can only add, change, and remove

a)

Coefficients

b)

Mass

c)

Subscripts

d)

Elements

52.

Balance the following:

Aluminum nitrate and Carbonic acid react to form

Aluminum carbonate and Nitric acid

a)

4,1,2,5

b)

1,3,6,2

c)

2,1,3,6

d)

2,3,1,6

53.

The following reaction is an example of what reaction type?
CoCO₃ → CoO + CO₂

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

54.

What type of reaction involves one element replacing another element in a compound?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

55.

What type of reaction involves ions from 2 compounds exchanging places to form 2 completely new compounds?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

56.

What are the reactants in the chemical equation pictured?

a)

CH₄ and CO₂

b)

CH₄ and O₂

c)

CO₂ and H₂O

d)

O₂ and H₂O

57.

What are the products of the chemical reaction pictured?

a)

CH₄ and CO₂

b)

CH₄ and O₂

c)

CO₂ and H₂O

d)

O₂ and H₂O

58.

What type of chemical reaction is this one?

Al(OH)₃ --> Al2O3 + H2O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

59.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

60.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

61.

3KOH + H₃PO₄ --> K₃PO₄+3H₂O

a)

Combination

b)

Decomposition

c)

Single replacement

d)

Double replacement

62.

CxHy +O₂--> H₂O + CO₂

a)

Decomposition

b)

Double replacement

c)

Combustion

d)

Single Replacement

63.

Pb(NO₃)₂ --> PbO + NO₂ + O₂

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Combustion

64.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H₂O

65.

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

66.

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

a)

1,3,3,1

b)

1,3,2,1

c)

2,3,3,1

d)

1,1,3,1

67.

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

68.

The red numbers in the image below represent ________

a)

subscripts

b)

coefficients

c)

I don't know, and don't want to try

d)

None of the answers are correct

69.

The blue numbers in the image below represent ________

a)

I don't know, and don't want to try

b)

coefficients

c)

subscripts

d)

none of the answers are correct

70.

Predict the products for this substance: Al₂O₃ → ? + ?

a)

Al + O₂

b)

O₂ + Al₃

c)

Al₂+ O₃

d)

Al + O

e)

Al₃ + O

71.

What are the products of this reaction?
Cu+ AgNO₃-->

a)

Cu(NO₃)₂+Ag

b)

CuNO₃ + Ag

c)

CuAg+NO₃

d)

Cu+ AgNO₃

72.

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

73.

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

74.

What kind of reaction is this:
4Fe + 3O₂ → 2Fe₂O₃

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

75.

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

76.

What kind of reaction is this:
Fe + CuSO₄ -> Cu + FeSO₄

a)

Double Replacement

b)

Decompostion

c)

Single Replacement

d)

Combustion

77.

What are the products of this reaction?

Cu²⁺ + AgNO₃→

a)

Cu(NO₃)₂+ Ag

b)

CuNO₃ + Ag

c)

CuAg + NO₃

d)

Cu + AgNO₃

78.

Write a balanced reaction for this reaction [Znhas a charge of 2+]

Zn(s) + H₂S(aq) →

a)

ZnS + H

b)

ZnS + H₂

c)

ZnS₂ + H

d)

Zn₂S + H₂

79.

Predict the products for the this reaction:
K + HCl -->

a)

KCl + H₂

b)

KHCl

c)

KH + Cl₂

d)

KCl + H

80.

Predict the products for the this reaction:

Mg + CuCl₂ →

a)

MgCl₂ + Cu

b)

MgCl + Cu

c)

MgCu + Cl₂

d)

CuMg + Cl₂

81.

Predict the products for the this reaction: [Aghas a charge of 1+]

Ag₃N + KCl →

a)

AgCl + K₃N

b)

AgK + ClN₃

c)

AgN₃ + KCl

d)

KAg + N₃Cl

Reactions (Synthesis, Decomposition, & Single-Displacement)

Total questions: 81

Worksheet time: 1hrs 1mins

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