Free Printable Chem Unit 5

1.

Which of the following is a balanced chemical equation for the reaction between hydrogen gas and oxygen gas to form water?

a)

$2H_2 + O_2 \rightarrow 2H_2O$

b)

$H_2 + O_2 \rightarrow H_2O$

c)

$2H_2 + 2O_2 \rightarrow 2H_2O$

d)

$H_2 + \frac{1}{2}O_2 \rightarrow H_2O$

2.

What type of chemical reaction is represented by the equation: $2Na + Cl_2 \rightarrow 2NaCl$ ?

a)

Decomposition

b)

Synthesis

c)

Single replacement

d)

Double replacement

3.

Predict the products of the following reaction: $CaCO_3 \rightarrow$

a)

$CaO + CO_2$

b)

$Ca + CO_2$

c)

$CaO + C$

d)

$Ca + O_2 + C$

4.

Which of the following is an example of a double replacement reaction?

a)

$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$

b)

$2H_2O \rightarrow 2H_2 + O_2$

c)

$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$

d)

$Zn + 2HCl \rightarrow ZnCl_2 + H_2$

5.

Balance the following chemical equation: $C_3H_8 + O_2 \rightarrow CO_2 + H_2O$

a)

$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$

b)

$C_3H_8 + 4O_2 \rightarrow 3CO_2 + 4H_2O$

c)

$C_3H_8 + 6O_2 \rightarrow 3CO_2 + 4H_2O$

d)

$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 5H_2O$

6.

Identify the type of reaction: $2KClO_3 \rightarrow 2KCl + 3O_2$

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Combustion

7.

What are the products of the combustion of methane ( $CH_4$ )?

a)

$CO_2$ and $H_2O$

b)

$C$ and $H_2$

c)

$CO$ and $H_2O$

d)

$C$ and $O_2$

8.

Which of the following equations represents a single replacement reaction?

a)

$2H_2 + O_2 \rightarrow 2H_2O$

b)

$Zn + 2HCl \rightarrow ZnCl_2 + H_2$

c)

$NaOH + HCl \rightarrow NaCl + H_2O$

d)

$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$

9.

Predict the products of the reaction: $2Al + 3CuCl_2 \rightarrow$

a)

$2AlCl_3 + 3Cu$

b)

$Al_2Cl_3 + Cu$

c)

$AlCl + Cu_2$

d)

$Al_2Cl_3 + 3Cu$

10.

Which of the following is a balanced equation for the decomposition of water?

a)

$2H_2O \rightarrow 2H_2 + O_2$

b)

$H_2O \rightarrow H_2 + O_2$

c)

$2H_2O \rightarrow H_2 + O_2$

d)

$H_2O \rightarrow 2H_2 + O_2$

11.

Identify the type of reaction: $Fe + S \rightarrow FeS$

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

12.

Identify the type of reaction: $Fe + S \rightarrow FeS$

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

13.

What type of reaction is $2H_2O_2 \rightarrow 2H_2O + O_2$ ?

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Combustion

14.

Predict the products of the reaction: $Mg + 2HCl \rightarrow$

a)

$MgCl_2 + H_2$

b)

$MgH_2 + Cl_2$

c)

$MgCl + H_2$

d)

$MgCl_2 + HCl$

15.

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

a)

$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$

b)

$2Na + Cl_2 \rightarrow 2NaCl$

c)

$CaCO_3 \rightarrow CaO + CO_2$

d)

$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$

16.

Balance the following chemical equation: $Fe + O_2 \rightarrow Fe_2O_3$

a)

$4Fe + 3O_2 \rightarrow 2Fe_2O_3$

b)

$2Fe + O_2 \rightarrow Fe_2O_3$

c)

$Fe + O_2 \rightarrow Fe_2O_3$

d)

$3Fe + 2O_2 \rightarrow Fe_2O_3$

17.

Identify the type of reaction: $2C_4H_{10} + 13O_2 \rightarrow 8CO_2 + 10H_2O$

a)

Synthesis

b)

Decomposition

c)

Combustion

d)

Single replacement

18.

What type of reaction is this?

Pb(NO₃)₂ + 2 KF --> PbF₂ + 2 KNO₃

a)

Single Replacement

b)

Double Replacement

c)

Combustion

d)

Synthesis

19.

What coefficients are needed to balance this equation? Na₂CO₃ + CaCl₂ ⟶ CaCO₃ + NaCl

a)

1 before Na₂CO₃ and 1 before CaCl₂

b)

1 before CaCO₃ and 1 before NaCl

c)

1 before Na₂CO₃ and 2 before NaCl

d)

2 before NaCl in the products

20.

How would you refer to the molecules on the left and right hand side of the arrow in the reaction represented: H₂ + O₂ ⟶ H₂O?

a)

Reactants and Products

b)

Substrates and Catalysts

c)

Reagents and Byproducts

d)

Inputs and Outputs

Chem Unit 5

Total questions: 20

Worksheet time: 27mins

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