1.

Hypo acts as a fixing agent. The correct statements are

Answer»

It GIVES collodial SULPHUR as a precipitate
It dissolve unreacted AgBr from photographic emulsion
It FORMS a complex `Na_(3)[Ag(S_(2)O_(3))_(2)]`
It forms a complex`Na_(3)[Ag_(2)(S_(2)O_(3))]`

Solution :`AgBr+2Na_(2)S_(2)O_(3) to Na_(3)[Ag(S_(2)O_(3))_(2)]+NaBr`


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