Question

Copper sulphate solution does not react with

• A. Zinc
• B. Iron
• C. Silver
• D. All of these

Answer 1

Answer: (C)

$CuS{O}_4$ will react with elements placed above it in electrochemical series and it would not react with elements places below it in electrochemical series.
∴ $CuS{O}_4$ reacts with Zn and Fe placed above it.
$CuS{O}_4$ + Fe → $FeS{O}_4$ + Cu
$CuS{O}_4$ + Zn → $ZnS{O}_4$ + Cu
∴ $CuS{O}_4$ does not react with Ag, placed below it.
$CuS{O}_4$ + Ag → no reaction.