Extraction of `Ag` from sulphide ore and removal of unreacted silver bromide from phorographic plate involve complexes:

Options

A. `[Ag(S_(2)O_(3))_(2)]^(3-)`in both
B. `[Ag(CN)_(2)]^(-)`in both
C. `[Ag(S_(2)O_(3))_(2)]^(3-),[Ag(CN)_(2)]^(-)`respectively
D. `[Ag(CN)_(2)^(-),[Ag(S_(2)O_(3))_(2)]^(3-)`respectively

Answer

D

Explanation

`Ag_(2)S+4CN^(-)rarr2[Ag(CN)_(2)]^(-)+S^(2-)`
`AgBr +2S2O_(3)^(2-)rarr [Ag(S_(2)O_(3))_(2)]^(3-) +Br^(-)`