Free Printable Chemical Reactions Review

1.

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

a)

Single Displacement Reaction

b)

Double Displacement Reaction

c)

Decomposition Reaction

2.

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

3.

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

a)

Single Displacement Reaction

b)

Double Displacement Reaction

c)

Synthesis Reaction

4.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

5.

What is the general form of a combustion reaction?

a)

A single reactant breaks down into multiple products.

b)

Two or more reactants combine to form a single product.

c)

A hydrocarbon reacts with oxygen to produce carbon dioxide and water.

d)

An element displaces another in a compound.

6.

Which of the following is an example of a synthesis reaction?

a)

$2KClO_3 \rightarrow 2KCl + 3O_2$

b)

$2Mg + O_2 \rightarrow 2MgO$

c)

$Zn + 2HCl \rightarrow ZnCl_2 + H_2$

d)

$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$

7.

What occurs during a decomposition reaction?

a)

Two compounds exchange partners.

b)

A single compound breaks down into two or more simpler substances.

c)

Two elements combine to form a compound.

d)

An element replaces another in a compound.

8.

In a single displacement reaction, what happens?

a)

Two compounds react to form two different compounds.

b)

A compound breaks down into simpler substances.

c)

An element in a compound is replaced by a more reactive element.

d)

Two elements combine to form a compound.

9.

Identify the type of reaction: $CuSO_4 + Zn \rightarrow ZnSO_4 + Cu$

a)

Combustion

b)

Synthesis

c)

Decomposition

d)

Single displacement

10.

Which reaction is an example of a double displacement reaction?

a)

$2Na + Cl_2 \rightarrow 2NaCl$

b)

$CaCO_3 \rightarrow CaO + CO_2$

c)

$Na_2S + Cd(NO_3)_2 \rightarrow CdS + 2NaNO_3$

d)

$C + O_2 \rightarrow CO_2$

11.

What is a key characteristic of a combustion reaction?

a)

It always involves oxygen as a reactant.

b)

It results in the formation of a single product.

c)

It only occurs with organic compounds.

d)

It is a type of synthesis reaction.

12.

Which statement best describes a synthesis reaction?

a)

A compound is heated and breaks down into simpler substances.

b)

Two or more reactants combine to form a new, more complex product.

c)

A more reactive metal displaces a less reactive metal from its compound.

d)

Two ionic compounds exchange ions to form two new compounds.

13.

Choose the correct example of a decomposition reaction:

a)

$H_2 + Cl_2 \rightarrow 2HCl$

b)

$2HgO \rightarrow 2Hg + O_2$

c)

$Fe + CuSO_4 \rightarrow FeSO_4 + Cu$

d)

$NaCl + AgNO_3 \rightarrow AgCl + NaNO_3$

14.

What is typically produced in a combustion reaction involving a hydrocarbon?

a)

Hydrogen gas and carbon monoxide

b)

Water and carbon dioxide

c)

Oxygen and carbon

d)

Hydrogen peroxide and carbon

15.

In a double displacement reaction, what is generally true about the reactants and products?

a)

The reactants are always gases, and the products are solids.

b)

The reactants are more complex than the products.

c)

The reactants exchange ions to form two new compounds.

d)

The products are less reactive than the reactants.

16.

Which of the following is a possible product of a reaction between Hydrogen (H) and Oxygen (O)?

a)

$Fe_2O_3$

b)

$CO_2$

c)

$H_2O$

d)

HF

17.

Which of the following is a possible product of a reaction between Carbon (C) and Oxygen (O)?

a)

H

b)

$CO_2$

c)

$H_2O$

d)

HF

18.

Which of the following is a possible product of a reaction between Iron(Fe) and Oxygen (O)?

a)

$Fe_2O_3$

b)

$CO_2$

c)

$H_2O$

d)

HF

19.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

Yes

b)

No

20.

Balance the equation below

_ WO₃ + _H₂ → _W + _H₂O

_{Note: Write the coefficient "1" to avoid ambiguity}

(a)

21.

Balance this equation.
_SnO₂+_H₂-->_Sn +_H₂O

a)

1,1,2,1

b)

1,2,1,1

c)

1,2,1,2

d)

1,2,2,1

22.

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

23.

Balance this equation-
_SeCl₆+_O₂>_SeO₂+_Cl₂

a)

1,2,1,2

b)

1,1,1,3

c)

1,2,1,1

d)

2,1,1,1

24.

An unbalanced equation is given below. After balancing the equation, what is the coefficient in front of H_2(g)?

Al_(s) + HCl_(aq) ---> AlCl_3(aq) + H_2(g)

a)

2

b)

3

c)

1

d)

6

25.

An unbalanced equation is given below. After balancing the equation, what is the coefficient in front of Cu_(s)?

Al_(s) + CuSO_4(aq) ---> Al₂(SO₄)_3(aq) + Cu_(s)

a)

2

b)

3

c)

1

d)

6

Chemical Reactions Review

Total questions: 25

Worksheet time: 1hrs 11mins

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