Question

26. A silver article generally turns black when kept in the open for a few days. The article when rubbed
With toothpaste again starts shining.
(a) why do silver articles turn black when kept in the open for a few days? Name the phenomenon
Involved.
[b] Name the black substances formed and give its chemical formula.​

Answer 1

Answer:

Explanation:

a) the silver article turns black due to oxidation.

Ag+H2S----------> Ag2S + H2 (black)

b) the black substance formed is silver sulphide and its formula is given above