Silver tarnishes when it reacts with sulfur compounds present in the air, such as hydrogen sulfide (H2S). This reaction forms a black layer of silver sulfide (Ag2S) on the surface of the silver.
Silver artefacts get tarnished in air due to the formation of
Asked in UPSC NDA 2 2022 · Topic: Metals, Minerals, Ores: Properties, Uses (Corrosion of metals: causes, mechanism (rusting), and prevention methods (galvanization, anodizing, electroplating, alloying, painting))
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