Decomposition/Synthesis

A decomposition reaction can be represented as _____________________.

• 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

This chemical equation for mercury oxide is an example of what type of reaction?
2HgO  → 2Hg + O₂

• decomposition reaction
• synthesis reaction
• combustion reaction
• Marvin the Martian reaction

Choose the balanced chemical equation for the formation of iron oxide.

• 2Fe + O₂ → 2FeO₂
• Fe + O₂ → FeO₂
• 4Fe + 3O₂ → 2Fe₂O₃
• 4Fe + O₂ → 2FeO₂

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A synthesis reaction can be represented as ________________________.

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

This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O₂  → 2MgO

• decomposition reaction
• synthesis reaction
• single displacement reaction
• combustion reaction

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr
• KClO₃ --> KCl + O₂
• HgO + Cl₂-->HgCl + O₂
• Cl₂ + NaBr --> NaCl + Br₂

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which chemical reaction breaks down into 2 substances?

• Double displacement
• Single displacement
• Synthesis
• Decomposition

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

• Synthesis
• Decomposition
• Combustion
• Double Replacement