Chemistry - Salt Analysis Question with Solution | TestHub

In the following reaction sequence in aqueous solution, the species$\text{X,}\text{Y}$and$\text{Z}$respectively, are

${\text{S}}_{\text{2}}{\text{O}}_3^{2-}\stackrel{{\text{Ag}}^{\text{+}}}{\to }\underset{\begin{array}{l}\text{ Clear}\\ \text{ Solution}\end{array}}{\text{X}}\stackrel{{\text{Ag}}^{\text{+}}}{\to }\underset{\begin{array}{l}\text{ White}\\ \text{Precipitate}\end{array}}{\text{Y}}\stackrel{\text{With}\text{time}}{\to }\underset{\begin{array}{l}\text{Black}\\ \text{Precipitate}\end{array}}{\text{Z}}$