physical and chemical changes 1

What type of chemical reaction is demonstrated in the experiment?

• Single displacement

• Double displacement

• Combination

• Decomposition

Why does iron displace copper from copper sulfate solution?

• Iron is less dense than copper

• Iron is more reactive than copper

• Copper is less dense than iron

• Copper is more reactive than iron

What is the color of the solution after the reaction, and what compound causes this color?

• Blue, Copper Sulfate

• Green, Iron Sulfate

• Reddish-brown, Copper

• Colorless, Iron Oxide

What is observed when an iron nail is left in a copper sulfate solution?

• The solution remains blue, and the iron nail rusts.

• The solution turns green, and a reddish-brown deposit forms on the iron nail.

• The solution becomes colorless, and the iron nail dissolves completely.

• The solution turns cloudy, and the iron nail becomes shiny.

What type of chemical reaction is characterized by a more reactive metal displacing a less reactive metal from its salt solution?

• Combination reaction

• Decomposition reaction

• Single displacement reaction

• Double displacement reaction