1.

Ferrous sulphate forms Turn bull's blue with

Answer»

KCN
`NH_(4)SCN`
`K_(3)[Fe(CN)_(6)]`
`K_(4)[Fe(CN_(6))]`

Solution :`3FeSO_(4)+K_(3)[Fe(CN)_(6)]toFe_(3)[Fe(CN)_(6)]_(2)+3K_(2)SO_(4)`, Ferraferric cyanide


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