1.

Whichof the following statement is/are correct withreference to the ferrous andferric ions?

Answer»

`Fe^(3+)` gives browncolour with potassium FERRICYANIDE
`Fe^(2+)` gives blue precipitate with potassium ferricyanide
`Fe^(3+)` gives RED colour with potassium thlocyanate
`Fe^(2+)` gives browncolour with AMMONIUM thiocyatute

Solution :`Fe^(2+) +K_(3)[Fe(CN)_(6)] rarr KFe^(II)[Fe^(III)(CN)_(6)] + 2K^(oplus)` Tumbull's blue is formed
`Fe^(3+) + 3KCNS rarr [Fe(CNS)_(3)] + 3K^(oplus)`
Blood -redcolour is formed


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