Question

Silver articles become black on prolonged exposure to the air due to the formation of : *​

Answer 1

Answer:

Silver metal is highly unreactive, i.e., it does not react with oxygen.

Silver metal is highly unreactive, i.e., it does not react with oxygen. But with prolonged exposure to air, it reacts with hydrogen sulphide gas (H2S).

gas (H2S). Silver articles form a coating of silver sulphide (Ag2S) and lose their shine (get tarnished).

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