Which list correctly identifies ferrous metals?

• A. Iron, Cold Rolled Steel, and Stainless Steel
• B. Iron, Aluminum, Copper
• C. Gold, Silver, Platinum
• D. Tin, Lead, Zinc

Answer: (A)

Ferrous metals are those that contain iron. The list that fits is the one with iron and iron-based alloys: iron itself, cold rolled steel, and stainless steel are all based on iron, so they’re ferrous. The other groups don’t contain iron as a primary element—aluminum and copper are non-ferrous; gold, silver, and platinum are non-ferrous precious metals; tin, lead, and zinc are non-ferrous metals. Ferrous metals are often magnetic and can rust due to iron, though alloys like stainless steel resist rust thanks to chromium.