Which metal is a silver-white noble metal that does not corrode in air?

Which metal is a silver-white noble metal that does not corrode in air?

• A. Palladium
• B. Platinum
• C. Porcelain
• D. Restorative

Answer: (B)

Platinum is a silver-white metal known for its exceptional resistance to corrosion and oxidation in air. This means it doesn’t form rust or tarnish when exposed to ordinary air, which is why it stays bright and stable over time. That combination of a bright silver-white appearance and near-absolute resistance to corrosion makes platinum the best example among metals for not corroding in air. Palladium is also a silver-white noble metal and quite resistant, but it isn’t as inert as platinum in all environments. The other options aren’t metals (porcelain is a ceramic, and “restorative” isn’t a metal term in this context), so platinum clearly fits the description.

Platinum is a silver-white metal known for its exceptional resistance to corrosion and oxidation in air. This means it doesn’t form rust or tarnish when exposed to ordinary air, which is why it stays bright and stable over time. That combination of a bright silver-white appearance and near-absolute resistance to corrosion makes platinum the best example among metals for not corroding in air. Palladium is also a silver-white noble metal and quite resistant, but it isn’t as inert as platinum in all environments. The other options aren’t metals (porcelain is a ceramic, and “restorative” isn’t a metal term in this context), so platinum clearly fits the description.