Chemistry - Complete s-block Question with Solution | TestHub

$\mathrm{N}{\mathrm{a}}_2{\mathrm{S}}_2{\mathrm{O}}_3.5{\mathrm{H}}_2\mathrm{O}$is used in photography to remove undecomposed AgBr as a soluble complex as follow
$\underset{}{\text{AgBr}+2{\text{Na}}_2{\text{S}}_2{\text{O}}_3}\to \underset{\text{Soluble complex}}{{\text{Na}}_3[\text{Ag}\left({\text{S}}_2{\text{O}}_3{)}_2\right]}+\text{NaBr}$