Free Printable Balancing Eq, Syn, Decomp, and Combustion Rxs.

1.

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)

$Li_2Cl_{ }$

2.

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)

$Mg_2Br_2$

3.

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

a)

$Al_3Cl$

b)

$AlCl$

c)

$AlCl_3$

d)

$Al_3Cl_2$

4.

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)

$LiP$

5.

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)

$Al_2S_3$

6.

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)

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

7.

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)

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

8.

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)

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

9.

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)

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

10.

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)

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

11.

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

12.

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

13.

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

14.

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

15.

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

16.

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

17.

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

18.

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

19.

What is decomposition?

a)

putting substances together

b)

breaking substances apart

c)

element replacing another element in a compoud

d)

burning of a subtance

20.

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

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

21.

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

22.

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

23.

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

24.

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

25.

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

26.

Which type of reaction is:

2 H₃AsO₄ → As₂O₅ + 3 H₂O

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Combustion

27.

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

28.

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

29.

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

30.

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

31.

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

a)

Coefficients

b)

Mass

c)

Subscripts

d)

Elements

32.

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

33.

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

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

34.

What type of reaction involves the breaking down of a substance into simpler substances?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

35.

What type of reaction involves 2 substances combining to form 1 new compound?

a)

Decomposition Reaction

b)

Single Replacement Reaction

c)

Double Replacement Reaction

d)

Synthesis Reaction

36.

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

37.

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

38.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

39.

CxHy +O₂--> H₂O + CO₂

a)

Decomposition

b)

Double replacement

c)

Combustion

d)

Single Replacement

40.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H₂O

41.

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

42.

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

43.

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

44.

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

45.

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

46.

Two chemicals reacted and one of the products stays dissolved in the solution. What symbol is used to indicate this?

a)

(s)

b)

(l)

c)

(aq)

d)

(g)

47.

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

a)

Al + O₂

b)

O₂ + Al₃

c)

Al₂+ O₃

d)

Al + O

e)

Al₃ + O

48.

If Ethylene (C₂H₄) reacts with Oxygen gas in a chemical reaction, what are the products?

a)

C₂O₂ + H₄

b)

CO₂ + H₂+ O₂

c)

CO + H₂

d)

CO₂ + H₂O

49.

Write a Balanced Equation for this reaction:
C₂H₄ + 2 O₂ -->

a)

C₂O₂ + H₄

b)

CO₂ + HOH

c)

CO + H

d)

2 CO₂ + 2H₂O

50.

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

51.

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

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

52.

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

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

53.

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

54.

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

55.

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

56.

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

57.

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

58.

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

59.

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

60.

What is decomposition?

a)

putting substances together

b)

breaking substances apart

c)

element replacing another element in a compoud

d)

burning of a subtance

61.

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

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

62.

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

63.

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

64.

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

65.

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

66.

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

67.

Which type of reaction is:

2 H₃AsO₄ → As₂O₅ + 3 H₂O

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Combustion

68.

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

69.

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

70.

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

71.

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

72.

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

a)

Coefficients

b)

Mass

c)

Subscripts

d)

Elements

73.

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

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

74.

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

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

Balancing Eq, Syn, Decomp, and Combustion Rxs.

Total questions: 74

Worksheet time: 3hrs 58mins

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