Free Printable Chemical Reactions and Balancing Quiz

1.

Which of the following is a synthesis reaction?

a)

$2H_2O \rightarrow 2H_2 + O_2$

b)

$2H_2 + O_2 \rightarrow 2H_2O$

c)

$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$

d)

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

2.

What is the law of conservation of matter?

a)

Matter can be created and destroyed.

b)

Matter cannot be created or destroyed in a chemical reaction.

c)

Matter changes into energy in every reaction.

d)

Matter is always heavier after a reaction.

3.

Which reaction type is represented by the equation $2KClO_3 \rightarrow 2KCl + 3O_2$ ?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

4.

Which of the following is a double replacement reaction?

a)

$Zn + 2HCl \rightarrow ZnCl_2 + H_2$

b)

$2Na + Cl_2 \rightarrow 2NaCl$

c)

$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$

d)

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

5.

Which coefficient is needed to balance the equation $H_2 + O_2 \rightarrow H_2O$ ?

a)

1 for all compounds

b)

2 for $H_2O$

c)

2 for $H_2$ and $H_2O$

d)

2 for $O_2$

6.

Which of the following is a combustion reaction?

a)

$2Na + Cl_2 \rightarrow 2NaCl$

b)

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

c)

$2KClO_3 \rightarrow 2KCl + 3O_2$

d)

$AgNO_3 + NaCl \rightarrow AgCl + NaNO_3$

7.

In the reaction $Zn + 2HCl \rightarrow ZnCl_2 + H_2$ , what type of reaction is this?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

8.

Given the reaction $BaCl_2(aq) + Na_2SO_4(aq) \rightarrow BaSO_4(s) + 2NaCl(aq)$ , which compound is the precipitate?

a)

$BaCl_2$

b)

$Na_2SO_4$

c)

$BaSO_4$

d)

$NaCl$

9.

Balance the equation: $C_3H_8 + O_2 \rightarrow CO_2 + H_2O$ . What are the correct coefficients?

a)

$1, 3, 3, 4$

b)

$1, 5, 3, 4$

c)

$2, 7, 6, 8$

d)

$1, 4, 3, 4$

10.

Which of the following reactions will produce a precipitate?

a)

$Na_2SO_4(aq)+KCl(aq)\rightarrow\ NaCl\left(aq\right)+KSO_4\left(aq\right)$

b)

$AgNO_3(aq) + NaCl(aq) \rightarrow AgCl(s) + NaNO_3(aq)$

c)

$HCl(aq) + NaOH(aq) \rightarrow NaCl(aq) + H_2O(l)$

d)

$KNO_3(aq)+NaCl(aq)\rightarrow\ KCl\left(aq\right)+NaNO_3\left(aq\right)$

11.

Which of the following best explains why the equation $2H_2 + O_2 \rightarrow 2H_2O$ is balanced?

a)

The number of molecules is the same on both sides.

b)

The number of atoms of each element is the same on both sides.

c)

The mass of reactants is less than the mass of products.

d)

The equation has the same coefficients for all compounds.

12.

A student mixes $Pb(NO_3)_2(aq)$ and $KI(aq)$ . Using solubility rules, predict the precipitate formed.

a)

$PbI_2$

b)

$KNO_3$

c)

$Pb(NO_3)_2$

d)

$KI$

13.

A chemical equation is unbalanced: $Fe + O_2 \rightarrow Fe_2O_3$ . What is the first step you should take to balance it?

a)

Add coefficients to $Fe_2O_3$ first.

b)

Count the number of atoms of each element on both sides.

c)

Add coefficients to $O_2$ first.

d)

Change the subscripts in the compounds.

14.

Match the following:

a)

Decomposition

1.

AB → A + B

b)

Synthesis

2.

A + B → AB

c)

Single Replacement

3.

A + BC → AC + B

d)

Combustion

4.

fuel + oxygen → water + carbon dioxide

15.

Please drag the coefficients to the proper location for this equation will be balanced.

a)

1

b)

2

c)

3

d)

4

1

2

1)

2)

Chemical Reactions and Balancing Quiz

Total questions: 15

Worksheet time: 17mins

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