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Types of Chemical Reactions

Total questions: 61

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

The chemical reaction: 2 H₂O → 2 H₂ + O₂ is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

2.

The chemical reaction: 8 Fe + S₈ → 8 FeS is a

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

3.

The chemical reaction: AgNO₃ + NaCl → AgCl + NaNO₃ is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

4.

The chemical reaction: Zn + H₂SO₄ → ZnSO₄ + H₂ is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

5.

The chemical reaction: 2 H₂ + O₂ → 2 H₂O is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

6.

The chemical reaction: CH₄ + 2 O₂ → CO₂ + 2 H₂O is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

7.

The chemical reaction: 2 Fe + 6 NaBr → 2 FeBr₃ + 6 Na is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

8.

The chemical reaction: Pb + O₂ → PbO₂ is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

9.

The chemical reaction: 2 CO + O₂ → 2 CO₂ is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

10.

The chemical reaction: Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2 H₂O is a:

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement

d)

Double Displacement

e)

Combustion

11.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

12.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

13.

compound ---> element + element

a)

synthesis

b)

decomposition

c)

combustion

d)

single replacement

14.

What reaction has the following general formula:

AB + CD --> CB + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

15.

What reaction has the following general formula:
CxHy + O2 −>CO2 + H2OC_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

16.

What is the general reaction scheme for a decomposition reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

CxHy+O2 −> CO2+H2OC_xH_y+O_2\ ->\ CO_2+H_2O

17.

What type of reaction is the following:
BaCl2+2KI −> 2KCl + BaI2BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

18.

Which of the following are signs of a chemical reaction?

a)

Formation of a gas

b)

A change in temperature

c)

A change in color

d)

A change in size

19.

What is the number before a chemical formula called?

Example: 2H2 + O2 ---> 2H2O

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

20.

What is the Law of Conservation of Mass?

a)

It states that matter cannot be created or destroyed.

b)

It states that energy cannot be created or destroyed.

c)

It states that matter can be created or destroyed.

d)

It states that sound can be created or destroyed.

21.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
22.
Which of the following is a polar molecule?
a)
CH4
b)
Xe
c)
H2O
d)
CO2
23.
Which formula represents a nonpolar molecule?
a)

HBr

b)

H2S

c)

CBr4

d)

PCl3

24.
Which of the following molecules, based on the elements present, would be most polar?
a)
HF
b)
H2
c)
HCl
d)
HBr
25.
In a polar covalent bond, electrons are shared ___________.
a)
equally
b)
unequally
c)
between non-metals with similar electronegativities
d)
between a metal and a non-metal
26.
A diatomic molecule like O2 is always_______ because electrons are shared ________.
a)
nonpolar; equally
b)
polar; equally
c)
nonpolar; unequally
d)
nonpolar; unequally
27.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

28.

Is this molecule polar or non-polar?

a)

Non-polar

b)

Polar

29.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

30.

Which diagram shows the bond with the correct dipole arrows and partial charge

a)
b)
c)
31.

Which diagram shows the bond with the correct dipole arrows and partial charge

a)
b)
c)
32.

Which diagram shows the bond with the correct dipole arrows and partial charge

a)
b)
c)
33.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

34.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

35.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

36.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

37.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

38.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

39.

Which type of reaction is shown here

a)

Double Replacement

b)

Synthesis

c)

Decomposition

d)

Combustion

e)

Single Replacement

40.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
41.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
42.

Which type of reaction is:

2 NH3 + H2SO4 → (NH4)2SO4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
43.

Which type of reaction is:

2 K + MgBr2 → 2 KBr + Mg

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
44.

The two sides of a chemical equation are called?

a)

Reactants (left) and Products (right)

b)

Ingredients (left) and Product (right)

c)

Cations and Anions

d)

Reactants (left) and Results (right)

45.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
46.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
47.

Which number is needed to balance potassium in the following equation?

2K + MgBr2 ⟶ …KBr + Mg2K\ +\ MgBr_2\ \longrightarrow\ \ldots KBr\ +\ Mg  

a)

3

b)

1

c)

2

d)

4

48.

Which coefficient is needed to balance Hydrogen in the following equation?

2Na + 2H2O ⟶ 2NaOH +…H22Na\ +\ 2H_2O\ \longrightarrow\ 2NaOH\ +\ldots H_2  

a)

2

b)

1

c)

3

d)

4

49.

True or false:

In any physical change or chemical reaction, mass is conserved.

a)

True

b)

False

50.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
51.
Name this compound.
N2O4
a)
dinitrogen tetroxide
b)
dinickel tetroxide
c)
nitrogen oxide
d)
nickel oxide
52.
What is the chemical formula for iodine heptafluoride?
a)
IF7
b)
I7F
c)
I7F7
d)
IF
53.

If I gain electrons I become

a)

Positive because I've added to my atom

b)

negative because I've added electrons

c)

same because i'm balanced

d)

equal because now I have electrons

54.
___C3H8 +___O2 --> ___CO2 + ___H2O
a)
1,5,3,4
b)
2,10,6,8
c)
already balanced
d)
1,5,5,4
55.
__Al + __Fe3N2 -->__AlN + __Fe
a)
already balanced
b)
4,2,4,6
c)
2,1,2,3
d)
1,2,1,3
56.
__Na + __Cl2 --> __NaCl
a)
1,1,2
b)
2,1,2
c)
2,1,1
d)
already balanced
57.
__H2O2 --> __H2O + __O2
a)
already balanced
b)
2,1,1
c)
2,2,1
d)
2,1,2
58.
__(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
59.
__BF3 + __Li2SO3 --> __B2(SO3)3 + __LiF
a)
2,3,1,3
b)
2,3,1,6
c)
4,4,2,12
d)
3,3,1,9
60.
_BaS + _PtF2 → _BaF2 + _PtS
a)
1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS
b)
4 BaS + 2 PtF2 → 1 BaF2 +  1 PtS
c)
1 BaS + 2 PtF2→ 2 BaF2 +  2 PtS
d)
1 BaS + 3 PtF2 →1 BaF2 +  2 PtS
61.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4

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