Chem. Chp. 7 Test Review

A decomposition reaction can be represented as (a)   .

• AB  → A + B
• A + B → AB
• AB + CD → AC + BD
• A + BC → B + AC

A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.

• single-replacement reaction
• synthesis reaction
• double-replacement reaction
• decomposition reaction

A chemical change in which two or more substances react to form a new substance is a ____________________________.

• decomposition reaction
• synthesis reaction
• double displacement reaction
• combustion reaction

What is decomposition?

• putting substances together
• breaking substances apart
• element replacing another element in a compoud
• burning of a subtance

What type of chemical reaction is this?
Al(OH)₃ → Al₂O₃  + H₂O

• Decomposition
• Combustion
• Synthesis
• Single Replacement 

The number of atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with
• must be an even number
• can be different to the number you finish with
• changes depending on how much energy is formed

What reaction type is characterized by the reactant breaking down as the reaction progresses?

• Synthesis
• Decomposition
• Combustion
• Double Replacement

What is the term for the → sign in a reaction?

• makes
• produces
• yields
• all are correct

the starting materials in a chemical reaction

• Products
• Reactants
• Starters
• Enders

a substance that is formed as the result of a chemical reaction

• Product 
• Reactant
• Starters
• Enders