Question

Silver articles turn black when kept in air for sometimes. Which compound is responsible for it?

Answer 1

silver oxide is responsible for it
2Ag+O2-->Ag2O

Answer 2

Silver turns black when kept in air for sometimes as it reacts with the sulphur compounds present in the air.

The main responsible compound is hydrogen sulphide (H2S).

And the compound formed is Silver sulphide (Ag2S).

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