Chemistry

Problem

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

\text{Ag}_3\text{N}

(b)

\text{Ag}_2\text{O}

(c)

\text{Ag}_2\text{S}

(d)

\text{Ag}_2\text{S}

and

\text{Ag}_3\text{N}

(a)

\text{Ag}_3\text{N}

(b)

\text{Ag}_2\text{O}

(c)

\text{Ag}_2\text{S}

(d)

\text{Ag}_2\text{S}

and

\text{Ag}_3\text{N}