Question

Give reason -
1) silver article black when kept exposed for a few days.

Answer 1

Explanation:

Answer: (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.

Answer 2

Answer:

(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 ( ).