Question

Silver Article turns Black When kept the open for a few days due the formation H2S

Answer 1

Hey! Silver articles turn black due to the formation of Ag2S (silver sulphide) from H2S since sulphur shows more affinity towards silver than hydrogen.

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Answer 2

Silver article turns black when kept in the air because silver reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air and forms silver sulphide.