Silver articles become black on prolonged exposure to air. This is due to the formation of

Options

A. `Ag_(3)N`
B. `Ag_(2)O`
C. `Ag_(2)S`
D. `Ag_(2)S "and" Ag_(3)N`

Answer

C

Explanation

Sulphur is present in air and silver gets tarnished after the reaction of sulphur. Because of formation of layer of silver sulphide silver articles become black on prologed exposure to sir.