Question

When Ag is exposed to air it B gets A Black Coating of

A Agno3
B AG2S
C AG2O
D AG2O3​

Answer 1

Answer:

b) Ag2S is your answer

Answer 2

Answer:

The correct option is (B) $Ag_{2}S$.

Explanation:

When silver ($Ag$) is exposed to air, it reacts with hydrogen sulfide ($H_{2}S$) present in it. A black coating develops on the surface of the silver. This black coating is silver sulfide.

The reaction goes as follows-

$Ag(s) + H_{2}S(g)$ → $Ag_{2}S(s)+H_{2}(g)$

Hydrogen gas is given off.

This is a displacement reaction as silver displaces hydrogen from its sulfate. Silver is oxidised, and hydrogen is reduced.