silver article turns black when kept in open for few days name the black substance formed and write its chemical formula
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(a) Silver article turns black when kept in the air because silver article reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air. The phenomenon is called corrosion. For silver particularly, it is called tarnishing of silver. (b) The black substance formed is silver sulphide
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The black substance formed is silver oxide (AgO)
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