Question

As we see the reactivity series, silver is a highly unreactive metal. Then what causes the silver metal to corrode?

Answer 1

The oxygen in air does not react with silver easily because silver is a highly unreactive metal. Nevertheless, air contains some sulphur compounds, including hydrogen sulfide gas. Silver is highly attractive to sulphur. Thus, silver gets corroded by $H_{2}S$ gas in presence of moisture and air pollutants.