Which of the following is non-ferrous?

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Multiple Choice

Which of the following is non-ferrous?

Explanation:
Non-ferrous metals are those that do not have iron as their main component. Aluminium fits this category because it does not contain iron and so is not a ferrous metal. The other materials listed are iron-based alloys—cast iron, mild steel, and stainless steel all have iron as their primary constituent (cast iron with carbon, mild steel with carbon, stainless steel with iron plus chromium). That makes them ferrous metals, not non-ferrous. So aluminium is the non-ferrous option.

Non-ferrous metals are those that do not have iron as their main component. Aluminium fits this category because it does not contain iron and so is not a ferrous metal. The other materials listed are iron-based alloys—cast iron, mild steel, and stainless steel all have iron as their primary constituent (cast iron with carbon, mild steel with carbon, stainless steel with iron plus chromium). That makes them ferrous metals, not non-ferrous. So aluminium is the non-ferrous option.

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