1.

Compound that is of Prussian Blue Colour?(a) Na4[Fe(CN)6S](b) Na4[Fe(CN)6NCS](c) Na4[Fe(CN)5NOS](d) Na2[Fe(CN)5NOS]

Answer»

(c) Na4[Fe(CN)5NOS]

Na2S+ Na2[Fe(CN)5NO] → Na4[Fe(CN)5NOS]

Sodium sulphide reacts with sodium nitroprusside to form a violet colour compound, which confirms the presence of sulfur.



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