Single Displacement Reactions Quiz

What occurs during a single displacement reaction?

• One element replaces another in a compound.

• Two elements combine to form a new compound.

• A compound breaks down into two elements.

• Two compounds exchange elements.

Answer explanation

In a single displacement reaction, one element replaces another in a compound, resulting in a new element and a new compound. This distinguishes it from other types of reactions, such as combination or decomposition.

In the reaction Fe + CuSO₄ → FeSO₄ + Cu, which element is displaced?

• Fe

• Cu

• S

• O

Answer explanation

In the reaction, iron (Fe) displaces copper (Cu) from copper sulfate (CuSO₄), forming iron sulfate (FeSO₄) and releasing copper. Therefore, the displaced element is Cu.

Which of the following is an example of a single displacement reaction?

• H₂ + O₂ → H₂O

• Fe + CuSO₄ → FeSO₄ + Cu

• NaCl + AgNO₃ → NaNO₃ + AgCl

• C + O₂ → CO₂

Answer explanation

The reaction Fe + CuSO₄ → FeSO₄ + Cu is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulfate (CuSO₄), forming iron sulfate (FeSO₄) and releasing copper.

What is a common type of single displacement reaction?

• Reactive metals displacing less reactive metals from solution

• Reactive metals displacing non-metals from solution

• Non-reactive metals displacing reactive metals from solution

• Non-metals displacing metals from solution

Answer explanation

In single displacement reactions, reactive metals can displace less reactive metals from their compounds in solution. This is a common occurrence, making the first choice the correct answer.

In a single displacement reaction, what can reactive metals displace from acids?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon

Answer explanation

In a single displacement reaction, reactive metals can displace hydrogen from acids, forming a salt and releasing hydrogen gas. Therefore, the correct answer is hydrogen.

What happens when a piece of copper wire is added to a silver nitrate solution?

• Copper dissolves in the solution.

• Silver metal is recovered from the solution.

• The solution turns blue.

• Copper nitrate is formed as a solid.

Answer explanation

When copper wire is added to silver nitrate solution, a displacement reaction occurs. Copper displaces silver ions, resulting in the formation of solid silver metal, which can be observed as it precipitates out of the solution.

What is the chemical equation for the displacement of silver ions by copper?

• Cu(s) + 2AgNO₃(aq) → 2Ag(s) + Cu(NO₃)₂(aq)

• Cu(s) + AgNO₃(aq) → Ag(s) + Cu(NO₃)₂(aq)

• Cu(s) + 2AgNO₃(aq) → Ag(s) + Cu(NO₃)₂(aq)

• Cu(s) + 2AgNO₃(aq) → 2Ag(s) + Cu(NO₃)(aq)

Answer explanation

The correct equation is Cu(s) + 2AgNO₃(aq) → 2Ag(s) + Cu(NO₃)₂(aq). Copper displaces silver ions from silver nitrate, producing solid silver and copper(II) nitrate, which is correctly represented in this choice.

What happens when a more reactive metal is placed in a solution with a less reactive metal?

• The more reactive metal displaces the less reactive metal.

• The less reactive metal displaces the more reactive metal.

• No reaction occurs.

• Both metals dissolve in the solution.

Answer explanation

When a more reactive metal is placed in a solution with a less reactive metal, the more reactive metal displaces the less reactive metal from the solution, resulting in a chemical reaction.

What will happen if a piece of silver is placed in a copper nitrate solution?

• Silver will displace copper.

• Copper will displace silver.

• No reaction will occur.

• Both metals will react to form a new compound.

Answer explanation

No reaction occurs because silver is less reactive than copper. In a copper nitrate solution, silver cannot displace copper, leading to no chemical change.

What are the products when an acid reacts with a reactive metal?

• Water and salt

• Salt and hydrogen gas

• Oxygen and salt

• Carbon dioxide and water

Answer explanation

When an acid reacts with a reactive metal, it produces salt and hydrogen gas. The metal displaces hydrogen from the acid, resulting in these two products.