Question

Silver articles turn black when exposed to the atmosphere for a few days due to the formation of silver sulphide.

• A. True
• B. False

Answer 1

The correct option is A

True

Silver articles when exposed to the atmosphere for a few days reacts with hydrogen sulphide to form silver sulphide. This results in the formation of black layer on the surface of silver articles. This phenomena is called tarnishing of silver. The reaction involved is:
${\text{2Ag(s) + H}}_2\text{S (g)}\to {\text{Ag}}_2{\text{S(s) + H}}_2\text{(g)}$