Question

Excite 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 and why

Answer 1

For the following reasons Iron scrap is used for reducing the leached copper ore:
1. As zinc is more electropositive [tendency to loose electron] than cooper .
2.A strong Reducing agent than iron
but Zinc is more costly than iron
due to cost, Iron is used in reducing leached cooper ore.