Question

A silver article generally
generally turns
blackwhen kept in the
open for a few days.
a) Name the phenomenon involved in this process.
b) Name the black substance formed.
​

Answer 1

Answer:

(a) Silver article turns black when kept in the air because silver article with sulphur compounds such as hydrogen sulphide (H2S) present in air. The phenomenon is called corrosion.

(b) For silver particularly, it is called tarnishing of silver.

Hope this helps you mate!

Answer 2

Answer: pl mark Brailiest

Explanation:

(a) Silver article turns black when kept in the air because silver article 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(Ag2S).

2AgSilver+H2SHydrogensulphide→Ag2SSilversulphide(black)+H2Hydrogen