9Fd - Displacement Reactions

What is the primary chemical reaction observed when zinc is placed in a blue copper sulfate solution?

• Zinc forms a protective layer over copper.

• Zinc dissolves completely without any reaction.

• Copper sulfate is converted into zinc sulfate.

• Zinc displaces copper, resulting in a color change.

What color does the copper sulfate solution turn when zinc is introduced?

• Red

• Colorless

• Yellow

• Green

What type of crystals are likely to form on the surface of the copper wire when it is placed in silver nitrate solution?

• Copper sulfate crystals

• Zinc oxide crystals

• Silver crystals

• Silver chloride crystals

Which metal is more reactive than copper, as indicated in the text?

• Iron

• Zinc

• Lead

• Aluminum

What is the significance of the color change in the copper sulfate solution during the reaction?

• It indicates the formation of a new compound.

• It means that the copper wire is dissolving.

• It signifies that the reaction is endothermic.

• It shows that the solution has become saturated.

In the context of the reactions described, what role does zinc play when introduced to copper sulfate?

• It displaces copper ions from the solution.

• It acts as a catalyst.

• It reduces copper ions to solid copper.

• It oxidizes copper ions to copper sulfate.

When observing the reaction of copper wire in silver nitrate solution, what is the expected outcome?

• The solution will turn blue.

• The wire will remain unchanged.

• The copper wire will dissolve completely.

• Silver will deposit on the wire.

What type of reaction occurs when aluminium reacts with iron oxide?

• Redox reaction

• Displacement reaction

• Combination reaction

• Decomposition reaction

What is the primary reason for the initial energy input in the thermite reaction?

• To increase the concentration of reactants

• To initiate the reaction

• To stabilize the products

• To cool down the reaction

In the context of the reactivity series, which metal is more reactive than iron?

• Zinc

• Gold

• Copper

• Lead