1.

The reaction of nitroprusside anion with sul- phide ion gives purple colouration due to the formation of

Answer»

The tetranionic complex of iron (II) coordinating to one `NOS^(-)` ion
The dianionic complex of iron (II) coordinating to one `NOS^(-)` ion
The trianionic complex of iron (III) coordinating to one `NOS^(-)` ion
The tetranionic complex of iron (III) coordinating to one `NCS^(-)` ion

Solution :`Na_(2)S + UNDERSET(" Sod. Nitroprusside")(Na_(2)[Fe(CN)_(5)NO]) RARR underset(" Violet colour")(Na_(4)[Fe(CN)_(5)NOS])`
`[Fe^(+2)(CN)_(5)^(-5)NOS]^(-4) rArr` Tetra ANIONIC complex of iron
(II) co-ordinating to one `NOS^(-)` ion.


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