Free Printable Understanding Chemical Reactions Quiz

1.

What are the substances to the right of the arrow in a chemical reaction called?

a)

Reactants

b)

Products

c)

Catalysts

d)

Coefficients

2.

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

a)

$2 \text{H}_2 + \text{O}_2 \rightarrow 2 \text{H}_2\text{O}$

b)

$\text{CH}_3\text{CH}_2\text{OH} + 3\text{O}_2 \rightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}$

c)

$\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$

d)

$\text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2$

3.

What type of chemical equation has the same number of atoms of each element on each side of the equation?

a)

Unbalanced equation

b)

Balanced equation

c)

Simple equation

d)

Complex equation

4.

In a chemical reaction, what does the symbol (aq) mean?

a)

Solid

b)

Liquid

c)

Gas

d)

Aqueous solution

5.

Which of the following equations best represents "magnesium reacting with chlorine to produce magnesium chloride"?

a)

$\text{Mg} \rightarrow \text{Cl}_2 + \text{MgCl}_2$

b)

$\text{MgCl}_2 + \text{Mg} \rightarrow \text{Cl}_2$

c)

$\text{MgCl}_2 + \text{Mg} \rightarrow \text{Cl}_2$

d)

$\text{Mg} + \text{Cl}_2 \rightarrow \text{MgCl}_2$

6.

What does the Law of Conservation of Mass state?

a)

Energy cannot be created nor destroyed.

b)

Matter cannot be created nor destroyed.

c)

Atoms cannot be created nor destroyed.

d)

Mass cannot be created nor destroyed.

7.

How many atoms of Nitrogen are represented in $2\text{Ca}(\text{NO}_3)_2$ ?

a)

2

b)

4

c)

6

d)

8

8.

Which of the following is a double displacement reaction?

a)

$2\text{Na} + \text{Cl}_2 \rightarrow 2\text{NaCl}$

b)

$\text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2$

c)

$2\text{KClO}_3 \rightarrow 2\text{KCl} + 3\text{O}_2$

d)

$\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$

9.

What type of reaction is it when energy is added to a chemical reaction for the reaction to take place?

a)

Exothermic

b)

Endothermic

c)

Endergonic

d)

Exergonic

10.

What is the role of a catalyst in a chemical reaction?

a)

It slows down the reaction.

b)

It speeds up the reaction.

c)

It changes the products of the reaction.

d)

It changes the reactants of the reaction.

Understanding Chemical Reactions Quiz

Total questions: 10

Worksheet time: 5mins

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