Types of Reactions Quiz
Questions: 16 · 10 minutes
1. A single compound breaks into two simpler substances when heated. Which reaction type is described?
Combustion
Synthesis
Double displacement
Decomposition
2. A zinc strip is placed in copper sulfate solution. Copper metal forms, and zinc sulfate remains in solution. How should the reaction be classified?
Synthesis
Single displacement
Double displacement
Decomposition
3. The equation H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O shows an acid reacting with a base. What is the most specific common label for this reaction?
Acid-base neutralization
Decomposition
Combustion
Synthesis
4. Two aqueous ionic compounds exchange ions, producing two new compounds. Which reaction type matches this pattern?
Combustion
Decomposition
Single displacement
Double displacement
5. A hydrocarbon burns completely in oxygen. What products are normally expected?
Carbon monoxide and oxygen
Carbon and hydrogen gas
Carbon dioxide and water
A salt and water
6. Hydrochloric acid reacts with potassium hydroxide to form potassium chloride and water. What is the most specific common classification?
Decomposition
Combustion
Single displacement
Acid-base neutralization
7. A student mixes two clear ionic solutions and an insoluble solid appears. Which classification best fits the formation of that solid?
Combustion reaction
Precipitation-type double displacement
Synthesis from two elements
Decomposition caused by heating
8. When two aqueous ionic solutions are mixed, which observation most strongly indicates a precipitation-type double-displacement reaction?
The solvent slowly evaporates from the open container.
An insoluble solid forms in the mixture.
One solution becomes paler after being diluted.
A solid reactant melts before the solutions are combined.
9. A sample of calcium carbonate is heated and produces calcium oxide and carbon dioxide. What type of reaction occurred?
Synthesis
Decomposition
Single displacement
Double displacement
10. An electric current causes water to produce hydrogen gas and oxygen gas. Based on the reactant-product pattern, what type of reaction is this?
Decomposition
Double displacement
Synthesis
Combustion
11. What is the key difference between single- and double-displacement reactions?
Single displacement always uses oxygen, while double displacement never does.
Single displacement occurs only in gases, while double displacement occurs only in solids.
Single displacement forms one product, while double displacement always forms three products.
Single displacement replaces one element in a compound, while double displacement exchanges ions between two compounds.
12. Calcium oxide reacts with water according to CaO + H₂O → Ca(OH)₂. Which type of reaction is this?
Single displacement
Decomposition
Synthesis
Double displacement
13. Which classification best matches AgNO₃ + NaCl → AgCl + NaNO₃?
Synthesis
Combustion
Double displacement
Single displacement
14. Which reaction is a single-displacement reaction?
Fe + CuSO₄ → FeSO₄ + Cu
CaCO₃ → CaO + CO₂
2H₂ + O₂ → 2H₂O
AgNO₃ + NaCl → AgCl + NaNO₃
15. Which general pattern represents a synthesis reaction?
An element replaces another element in a compound.
One compound separates into two or more products.
Two or more reactants combine to form one product.
Two compounds exchange ions to form two new compounds.
16. How is the reaction 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O best classified?
Complete combustion
Single displacement
Acid-base neutralization
Decomposition