A technician at an e-waste recycling facility needs to isolate pure metals from dry, solid heterogeneous mixtures using only an overhead permanent magnet in a single physical step. Mixture I: Iron filings and nickel powder Mixture II: Zinc granules and aluminum flakes Mixture III: Brass filings and copper powder Mixture IV: Cobalt pellets and copper shavings Which mixture can be completely separated into its two constituent metals using this method, and why?

A) Mixture I, because both iron and nickel contain magnetic domains that respond to the applied field.

B) Mixture II, because aluminum has a significantly lower density than zinc and is repelled by magnetic flux lines.

C) Mixture III, because copper is completely non-magnetic while brass behaves as a strongly ferromagnetic alloy.

D) Mixture IV, because cobalt is ferromagnetic and adheres to the magnet, whereas copper is non-magnetic and stays behind.

Magnetic separation Transitional Reasoning Practice

Chemistry · Matter · Chemistry · Separation of Mixtures

1 Chemistry practice questions on Magnetic separation. Questions that build towards applied reasoning.

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