Chemical Reactions Practice Quiz

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same
• that matter can only be changed into new substances by introducing a catalyst
• that matter exists in the same state throughout any chemical change
• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

How many Al atoms are in this compound?         4Al₂O₃

• 2
• 8
• 6
• 4

How many F atoms are in this compound?
6MgF₂ 

• 2
• 6
• 8
• 12

The reactants in the image above are:

• CH4 and 2 O2

• 2 H2O and CO2

• All of these are reactants

• All of these are products

The products in the image above are:

• CH4 and 2 O2

• 2 H2O and CO2

• All of these are reactants

• All of these are products

Breaking down a substance into simpler substances

• Displacement
• Synthesis
• Decomposition
• Oxidation

Identify the following chemical reaction.

2 NaBr + 1 Ca(OH)₂ ----> 1 CaBr₂ + 2 NaOH

• Synthesis (or combination)

• Decomposition

• Single displacement

• Double displacement

Identify the following chemical reaction.

Pb + FeSO₄ ----> PbSO₄ + Fe

• Synthesis (or combination)

• Decomposition

• Single displacement

• Double displacement

What reaction has the following general formula:

A + CD --> C + AD

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

Which chemical reaction always starts with a hydrocarbon that reacts with oxygen and produces carbon dioxide and water?

• Decomposition

• Synthesis

• Combustion

• Single Replacement