Multiple choice

Which of the following articles undergo(es) corrosion?

  1. Iron

  2. Gold

  3. Silver

  4. Both (1) and (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Iron is shiny grey but it reacts with water vapours and oxygen present in air. After the reaction, its surface gets covered with the coating of a brown flaky substance called rust. Rust is mainly hydrated ferric oxide (Fe2O3.xH2O). Both gold and silver are unreactive in nature.

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