Question

Silver article turns black when kept in the open for a few days due to formation of symbol

Answer 1

Answer: AgS

Explanation:

Silver metal is attacked by moisture, acids and sulphur compound resulting in the formation of a black coloured layer of silver sulphide (AgS).

Answer 2

Answer:

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.

Explanation: