Chemical Reactions Assessment 2 Practice

Which reaction type produces only one product?

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

Which reaction type starts with only one reactant?

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

Which reaction type is a reaction of a fuel with oxygen that always produces water and carbon dioxide?

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

Which reaction type shows one element trading places with another element? Each side of the equation has one element and one compound.

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

Which reaction type shows two elements trading places? Each side of the equation has two compounds.

• synthesis
• decomposition
• single replacement
• double replacement
• combustion

Which equations show synthesis reactions?

• Fe + S --> FeS

• 2Mg + O2 --> 2MgO

• 2Na + Cl2 --> 2NaCl

• C+O2 -- CO2

• 2MgO --> 2Mg + O₂

Which equations show decomposition reactions?

• CaO + CO₂ --> CaCO₃

• 2H2O2 --> 2H20 +O2

• 2KClO3 --> 2KCl + 3O2

• H2CO3 --> H2O + CO2

• 2AgBr --> 2Ag + Br2

Which equations show single replacement reactions?

• Mg + 2HCl --> MgCl2 + H2

• 2K + 2H2O --> 2KOH + H2

• Cl2 + CaI2 --> CaCl2 + I2

• Zn + 2HCl --> ZnCl2 + H2

• FeS + 2HCl --> FeCl2 + H2S

Which equations show double replacement reactions?

• Na2S + 2HCl --> 2NaCl +H2S

• AgNO3 + NaCl --> AgCl + NaNO3

• KBr + AgNO3 --> KNO3 + AgBr

• HCl + NaOH --> NaCl + H2O

• Zn + 2HCl --> ZnCl2 + H2

Lithium (Li) reacts with hydrochloric acid (HCl) to produce hydrogen gas (H₂) and lithium chloride (LiCl). Write a chemical equation that shows this reaction. Balance the chemical equation and identify which type of reaction this represents.

• 2Li + 2HCl --> H₂ + 2LiCl ; Single Replacement

• Li + HCl --> H₂ + LiCl ; Single Replacement

• 2Li + 2HCl --> H₂ + 2LiCl ; Double Replacement