1.

Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produces purple colour ion due to the formation off

Answer»

`NA[Fe(H_(2)O)_(5)NOS]`
`Na_(2)[H_(2)O)_(5)NOS]`
`Na_(3)[Fe(CN)_(5)NOS]`
`Na_(4)[Fe(CN)_(5)NOS]`

Solution :`Na_(4)[Fe(CN)_(5)NO]+S^(2-)to UNDERSET("Sodium thio-nitroprusside (VIOLET)")(Na_(4)[Fe(CN)_(5)NOS])`


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