Question

Copper sulphate solution, which is blue in colour, will change to a colourless solution with the addition of which metal?

• A. $Au$
• B. $Ag$
• C. $Zn$
• D. All of these

Answer 1

Answer: (C)

$Zn$

As we know, among given metals only $Zn$ is more reactive than $Cu$ so it will replace $Cu$ and forms a colourless solution.
$Zn+CuS{O}_4\to ZnS{O}_4+Cu$