IRON & COPPER SULPHATE

What is observed when an iron nail is dipped in copper sulfate solution?
A) No reaction
B) Iron nail dissolves
C) A brown coating forms on the nail
D) Blue color of the solution deepens

• A

• B

• C

• D

What is the color of copper sulfate solution before the reaction?
A) Colorless
B) Green
C) Blue
D) Brown

• A

• B

• C

• D

The brown coating that appears on the iron nail is due to:
A) Iron oxide
B) Copper metal
C) Copper oxide
D) Iron sulfate

• A

• B

• C

• D

What happens to the color of the copper sulfate solution after the reaction?
A) It becomes red
B) It becomes more blue
C) It becomes greenish or fades
D) No change

• A

• B

• C

• D

What is the reason for the green color observed in the solution after dipping an iron nail in copper sulfate solution?
A) Formation of copper chloride
B) Presence of iron sulfate (FeSO₄)
C) Dissolution of iron nail
D) Formation of copper hydroxide

• A

• B

• C

• D

Which type of chemical reaction takes place in this activity?
A) Combination
B) Decomposition
C) Double displacement
D) Displacement

• A

• B

• C

• D

What is the chemical equation for this reaction?
A) CuSO₄ + Fe → FeSO₄ + Cu
B) FeSO₄ + Cu → CuSO₄ + Fe
C) Fe + Cu → CuFe
D) Cu + FeSO₄ → Fe + CuSO₄

• A

• B

• C

• D

Why does iron displace copper from copper sulfate solution?
A) Iron is less reactive than copper
B) Copper is more reactive than iron
C) Iron is more reactive than copper
D) Iron is heavier than copper

• A

• B

• C

• D