1.

Which of the following statements (s) is (are) correct with reference to the ferrous and ferric ions? (a). `Fe^(3+)` gives brown colour with potassium ferricyanide. (b). `Fe^(2+)` gives blue precipitate with potassium ferricyanide. (c). `Fe^(2+)` gives red colour with potassium thiocyanate. (d). `Fe^(2+)` gives brown colour with ammonium thiocyanate.

Answer» b,c
`Fe^(2+)+K_3[Fe(CN)_6]toFe_2^(II)[Fe^(II)(CN)_6]darr`
`Fe^(3+)+K(SCN)toFe(SCN)_3darr` (blood test)


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