General Principles And Process Of Isolation Of Elements

The magnetic separation method is utilized in the concentration of ores that have magnetic properties. This technique involves the use of magnetic fields to separate magnetic materials from non-magnetic ones. Let us evaluate the given metals:

• Aluminium: Bauxite is the primary ore of aluminium, and it is not magnetic.
• Cadmium: Typically found with zinc ores, cadmium is not magnetic.
• Iron: Its ores, such as magnetite (Fe₃O₄) and hematite, possess strong magnetic properties.
• Zinc: Zinc ores are non-magnetic.

Among the provided options, Iron is the metal whose ore, particularly magnetite, can be concentrated using magnetic separation due to its intrinsic magnetic properties.

Conclusion: The correct answer is Iron.