Question

Zinc is used for the recovery of Ag from the complex $\left[Ag\right(CN{)}_2]-$ while copper is not used because Zn is powerful reducing agent than Cu.
If true enter 1,else enter 0.

Answer 1

$Zn$ is used for recovery of $Ag$ from the complex $\left[Ag\right(CN{)}_2{]}^{-}$ while $Cu$ is not used because $Zn$ is more powerful reducing agent than $Cu$ as $Zn$ being more reactive than $Cu$ as is mentioned in the reactivity series of metals.