At a site,low grade copper ores are available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why?

(B) The reduction of leached copper ore $(Cu^{2+})$ can be carried out using either $zinc$ $(Zn)$ or $iron$ $(Fe)$ scraps based on the displacement reaction: $M + Cu^{2+} \rightarrow M^{2+} + Cu$.
$Zinc$ is more reactive than $iron$ as it is placed higher in the electrochemical series,meaning the reduction process would be faster with $zinc$.
However,$iron$ is significantly cheaper than $zinc$. Therefore,from an economic and industrial perspective,$iron$ scraps are more suitable and advantageous for the reduction of leached copper ore.