Which property describes gold?

Which property describes gold?

• A. Rusts easily
• B. Tarnishes in air
• C. Doesn't rust or tarnish
• D. Molds at room temperature

Answer: (C)

Gold is highly resistant to corrosion because it is a noble metal. Rusting is the oxidation of iron, and tarnishing is a surface change that metals like copper or silver can undergo when exposed to air or certain chemicals. Gold doesn’t react with oxygen or water under normal conditions, so it doesn’t form oxides that dull or discolor its surface. That means it generally doesn’t rust or tarnish, which is why it stays shiny in jewelry and electronics. Mold at room temperature is a biological process and isn’t related to a metal’s chemical resistance, so it doesn’t describe gold’s property.

Gold is highly resistant to corrosion because it is a noble metal. Rusting is the oxidation of iron, and tarnishing is a surface change that metals like copper or silver can undergo when exposed to air or certain chemicals. Gold doesn’t react with oxygen or water under normal conditions, so it doesn’t form oxides that dull or discolor its surface. That means it generally doesn’t rust or tarnish, which is why it stays shiny in jewelry and electronics. Mold at room temperature is a biological process and isn’t related to a metal’s chemical resistance, so it doesn’t describe gold’s property.