Question

why do silver articles turn black when kept in open for a few days?

Answer 1

Answer:

due to rusting

Explanation:

rusting is a type of corrosion in which a metal is covered with a layer of chemical due to reaction of oxygen ND water vapour

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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