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Types of Reactions Test

Total questions: 70

Worksheet time: 43mins

Name
Class
Date
1.

How would you classify this reaction:

Pb + FeSO4 → PbSO4 + Fe

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

2.

How would you classify this reaction:

CaCO3 → CaO + CO2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

3.

How would you classify this reaction:

P4 + 3 O2 → 2 P2O3

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

4.

How would you classify this reaction:

2 RbNO3 + BeF2 → Be(NO3)2 + 2 RbF

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

5.

How would you classify this reaction:

2 AgNO3 + Cu → Cu(NO3)2 + 2 Ag

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

6.

How would you classify this reaction:

C3H6O + 4 O2 → 3 CO2 + 3 H2O

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

7.

How would you classify this reaction:

2 C5H5 + Fe → Fe(C5H5)2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

8.

How would you classify this reaction:

SeCl6 + O2 → SeO2 + 3Cl2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

9.

How would you classify this reaction:

2 MgI2 + Mn(SO3)2 → 2 MgSO3 + MnI4

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

10.

How would you classify this reaction:

O3 → O + O2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

e)

combustion

11.

Fill in the blanks (in order) to balance this equation:

____ NaBr + ____ CaO2H2 → ___ CaBr2 + ____ NaOH

a)

2-1-1-2

b)

1-2-1-2

c)

2-2-1-2

d)

1-1-2-1

12.

Fill in the blanks (in order) to balance this equation:

____ C2H16 + ____ O2 → ____ CO2 + ____ H2O

a)

2-1-1-2

b)

1-6-2-8

c)

2-4-6-2

d)

1-3-2-4

13.

Fill in the blanks (in order) to balance this equation:

____ Pb + ____ PO4 → ____ Pb3P2O8

a)

2-2-1

b)

3-2-2

c)

3-2-1

d)

6-4-1

14.

Fill in the blanks (in order) to balance this equation:

____ FeBr3 + ______H2SO4 → _____Fe2 S3O12 + _____ HBr

a)

2-3-1-6

b)

2-3-1-4

c)

6-1-3-4

d)

1-3-2-4

15.

Fill in the blanks (in order) to balance this equation:

____ Fe + ____Cl2 → ____FeCl3

a)

2-2-1

b)

3-2-1

c)

2-3-4

d)

2-3-2

16.

On the graph what is represented by the Letter A?

a)

reactants

b)

activation energy

c)

products

d)

endothermic

17.

On the graph what is represented by the Letter B?

a)

reactants

b)

activation energy

c)

products

d)

endothermic

18.

On the graph what is represented by the Letter C?

a)

reactants

b)

activation energy

c)

products

d)

endothermic

19.

Is this endothermic or exothermic?

a)

neither

b)

both

c)

exothermic

d)

endothermic

20.

How do you know that this reaction is endothermic?

a)

The products have more energy than the reactants

b)

The reactants have more energy than the products

21.

On the graph what is represented by the Letter A?

a)

reactants

b)

activation energy

c)

products

d)

endothermic

22.

On the graph what is represented by the Letter B?

a)

reactants

b)

activation energy

c)

products

d)

endothermic

23.

On the graph what is represented by the Letter C?

a)

reactants

b)

activation energy

c)

products

d)

endothermic

24.

Is this endothermic or exothermic?

a)

neither

b)

both

c)

exothermic

d)

endothermic

25.

How do you know that this reaction is exothermic?

a)

The products have more energy than the reactants

b)

The reactants have more energy than the products

26.

What is activation energy?

a)

the energy needed to make a reaction happen

b)

the energy needed by the products

c)

the energy given by the reactants

d)

the energy that is released during the reaction

27.

What is an endothermic reaction?

a)

Energy is released from the breaking of chemical bonds in the products

b)

Energy is absorbed by the making of chemical bonds in the products

c)

Energy is released as temperature

d)

Energy is absorbed as temperature

28.

What is an exothermic reaction?

a)

Energy is released from the breaking of chemical bonds in the products

b)

Energy is absorbed by the making of chemical bonds in the products

c)

Energy is released as temperature

d)

Energy is absorbed as temperature

29.

Why are phase changes NOT endothermic nor exothermic?

a)

the heat energy is not changing during phase change

b)

the temperature is not changing during phase change

c)

chemical bonds are not being made nor broken during phase change

d)

kinetic energy of the particles is not changing in phase change

30.

Which part(s) of the formula below are reactants?

2 RbNO3 + BeF2 → Be(NO3)2 + 2 RbF

(check all that apply)

a)

2 RbNO3

b)

BeF2

c)

Be(NO3)2

d)

RbF

31.

Which part(s) of the formula below are products?

2 RbNO3 + BeF2 → Be(NO3)2 + 2 RbF

(check all that apply)

a)

2 RbNO3

b)

BeF2

c)

Be(NO3)2

d)

RbF

32.

Which part(s) of the formula below are products?

2 C5H5 + Fe → Fe(C5H5)2

(check all that apply)

a)

2 C5H5

b)

Fe

c)

Fe(C5H5)2

33.

Which part(s) of the formula below are reactants?

2 C5H5 + Fe → Fe(C5H5)2

(check all that apply)

a)

2 C5H5

b)

Fe

c)

Fe(C5H5)2

34.

Which description below describes synthesis reactions?

a)

one atom/molecule switches partners

b)

two atoms/molecules switch partners

c)

small atoms/molecules combine to form a bigger molecule

d)

a big molecule breaks down into smaller atoms/molecules

35.

Which description below describes decomposition reactions?

a)

one atom/molecule switches partners

b)

two atoms/molecules switch partners

c)

small atoms/molecules combine to form a bigger molecule

d)

a big molecule breaks down into smaller atoms/molecules

36.

Which description below describes double replacement reactions?

a)

one atom/molecule switches partners

b)

two atoms/molecules switch partners

c)

small atoms/molecules combine to form a bigger molecule

d)

a big molecule breaks down into smaller atoms/molecules

37.

Which description below describes single replacement reactions?

a)

one atom/molecule switches partners

b)

two atoms/molecules switch partners

c)

small atoms/molecules combine to form a bigger molecule

d)

a big molecule breaks down into smaller atoms/molecules

38.

Describe nuclear fusion:

a)

small atoms combine to form a larger atom

b)

a large atom breaks down to form smaller atoms

c)

an unstable nucleus releases particles and/or energy

39.

Describe nuclear fission:

a)

small atoms combine to form a larger atom

b)

a large atom breaks down to form smaller atoms

c)

an unstable nucleus releases particles and/or energy

40.

Describe nuclear decay:

a)

small atoms combine to form a larger atom

b)

a large atom breaks down to form smaller atoms

c)

an unstable nucleus releases particles and/or energy

41.

Describe an alpha particle:

a)

2 protons and 2 neutrons

b)

1 electron

c)

releases energy only

42.

Describe a beta particle:

a)

2 protons and 2 neutrons

b)

1 electron

c)

releases energy only

43.

Describe gamma decay:

a)

2 protons and 2 neutrons

b)

1 electron

c)

releases energy only

44.
When an acid reacts with a base, all of the following are produced EXCEPT...
a)
A salt
b)
Water
c)
a strong acid
d)
a neutral substance
45.

HCO3- + H2O → H3O+ + CO32-

Water is acting as

a)

a Bronsted Lowry base

b)

a Bronsted Lowry acid

c)

a conjugate base

d)

a conjugate acid

46.

What is the correct acid-base pair for the following reaction?

CN + H2O ---> HCN + OH

a)

CN & H2O

b)

H2O & HCN

c)

HCN & OH

d)

H2O & OH

47.

In an acid-base reaction, what is formed when an acid reacts with a base?

a)

Salt only

b)

Water only

c)

Salt and water

d)

Gas

48.
Acids react with
a)
water to produce bases and salts
b)
salts to produce bases and water
c)
neither bases, salts nor water
d)
bases to produce salts and water
49.

Which of the following is the correct word equation for the reaction between hydrochloric acid and sodium hydroxide?

a)

Hydrochloric acid + Sodium hydroxide → Sodium chloride + Water

b)

Hydrochloric acid + Sodium hydroxide → Carbon dioxide + Water

c)

Hydrochloric acid + Sodium hydroxide → Hydrogen gas

d)

Hydrochloric acid + Sodium hydroxide → Sodium bicarbonate + Water

50.

What is produced when an acid reacts with a metal?

a)

Salt and water

b)

Salt and hydrogen gas

c)

Water and carbon dioxide

d)

Water and oxygen gas

51.

Which of the following is the strongest acid?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

52.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
53.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
54.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
55.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
56.
3Mg + N2 --> Mg3N2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
57.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
58.
A + BC = B + AC
a)
Single Replacement
b)
Combustion
c)
Double Replacement
d)
Synthesis
59.

Match the following

a)

1 reactant breaks apart into 2 or more smaller products

1.

decomposition

b)

2 or more reactants combine to make 1 product

2.

synthesis

c)

O2 as a reactant & CO2 and water as products

3.

combustion

d)

1 element & 1 compound in products & reactants

4.

single replacement

e)

2 compounds in reactants & products

5.

double replacement

60.

In a double replacement reaction, a product that is soluble in water will be labeled ​ (a)   and a product that is a precipitate will be labeled ​ (b)  

Choose from the below words
(aq)
(s)
(w)
(l)
(g)
(d)
(p)
61.

Match the types of chemical reactions to their description.

a)

Two or more substances combine to form a single compound.

1.

Synthesis

b)

A compound breaks down into two or more simpler substances.

2.

Decomposition

c)

A reaction with oxygen releasing light and heat.

3.

Combustion

d)

A lone element replaces an element in a compound.

4.

Single Replacement

e)

Two ionic compounds swap their elements.

5.

Double Replacement

62.

Which type of reaction is this?


CH4 + 2 O2 ---> CO2 + 2 H2O

a)

synthesis

b)

decomposition

c)

combustion

d)

double replacement

63.

In a chemical equation, a reactant or product labeled ​ (a)   is a solid and a reactant or product labeled ​ (b)   is dissolved in water

Choose from the below words
(s)
(aq)
(l)
(w)
(g)
(d)
(p)
64.
What type of chemical reaction is this one?
CuO + CO2 --> CuCO3
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
65.

Which type of reaction is this?


4 Si + 1 S8 --> 2 Si2S4

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

66.

Which type of reaction is this?


3 Ca + 2 AlCl3--> 3 CaCl2 + 2 Al

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

67.

Which type of reaction is this?


3 KOH + 1 H3PO4--> 1 K3PO4 + 3 H2O

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

68.
What type of chemical reaction is this one?
Ca + MgCl2 --> CaCl2 + Mg
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
69.

Which type of reaction is this?


2 NO2--> 1 N2 + 2 O2

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

70.

Match the types of chemical equations to their definitions.

a)

Skeleton Equation

1.

Basic equation showing the formulas of compounds involved in a reaction.

b)

Word Equation

2.

Explains what happens during the reaction in words.

c)

Balanced Equation

3.

Shows the substances that are reacting AND the correct number of atoms of all elements.

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