`AgNO_(3) overset(Delta)(to)(W)+(X)+O_(2)`
`(X)+H_(2)O to HNO_(2)+HNO_(3)`
`(W)+HNO_(3) to Y+NO+H_(2)O`
`(Y)+Na_(2)S_(2)O_(3)("excess") to (Z)+NaNO_(3)`
Identify (W) to (Z).

Options

A. `W=Ag, X=N_(2)O,Y=AgNO_(3),Z=Na_(2)[Ag(S_(2)O_(3))_(2)]`
B. `W=Ag_(2)O, X=NO,Y=AgNO_(3),Z=Na_(3)[Ag(S_(2)O_(3))_(2)]`
C. `W=Ag, X=NO_(2),Y=AgNO_(3),Z=Na_(3)[Ag(S_(2)O_(3))_(2)]`
D. `W=Ag_(2)O, X=N_(2),Y=AgNO_(3),Z=Na[Ag(S_(2)O_(3))_(2)]`

Answer

C

Explanation

`Na_(2)[overset(II)(Fe)(NO)(CN)_(5)]+Na_(2)S to Na[overset(II)(Fe)(CN)_(5)(NOS)]`