1.

Which of the following change the colour of the aqueous solution of FeCl_(3)

Answer»

`K_(4)[Fe(CN)_(6)]`
`H_(2)S`
`NH_(4)CNS`
`KCNS`

Solution :`FeCl_(3)+K_(4)[Fe(CN)_(6)]to underset("FERRI ferrocyanide (blue)")(Fe_(4)[Fe(CN)_(6)]_(3))`
`2FeCl_(3)+3H_(2)S to Fe_(2)S_(3)+6HCL`
`3NH_(3)CNS+FeCl_(3)to underset(("blood RED"))(Fe(CNS)_(3))+3NH_(4)Cl`
`FeCl_(3)+3KCNSto underset(("Blood red"))(Fe(CNS)_(3))+3KCl`


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