Question

Which of the following pairs will give displacement reaction?

• A. FeSO4 Solution and Copper metal
• B. CuSO4 Solution and Silver metal
• C. AgNO3 Solution and Copper metal
• D. NaCl Solution and Copper metal

Answer 1

Answer:

C. AgNO3 Solution and Copper metal

This pair will give a displacement reaction because:

• Copper (Cu) is more reactive than Silver (Ag) in the activity series

• However, in this specific case, the reaction will not occur as expected

The actual reaction is:

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

But, since Silver (Ag) is less reactive than Copper (Cu) in the activity series, the reaction will not proceed as a typical displacement reaction.

Instead, the reaction will be:

2Ag⁺ (aq) + Cu (s) → Cu²⁺ (aq) + 2Ag (s)

However, this reaction is not a typical displacement reaction, as Silver ions are being reduced to Silver metal, and Copper metal is being oxidized to Copper ions.

So, to confirm:

• The correct pair is indeed AgNO3 Solution and Copper metal, but the reaction will not be a typical displacement reaction as expected.