The $MacArthur-Forrest$ process is used for the extraction of which of the following metals?

Thermite is a mixture of iron oxide and which of the following?

How are the most electropositive metals extracted from their ores?

Carbon cannot be used in the reduction of $Al_2O_3$ because

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?

Explain the thermodynamics of the extraction of iron from its oxide.