The formula of sodium nitroprusside is

Which one of the following is the formula of sodium nitroprusside?

The formula for dosium nitroprusside is

What is the chemical formula of sodium nitroprusside ?

Freshly prepared solution of sodium nitroprusside is added to the sodium extract. Appearance of a deep violet colour indicates the presence of

The oxidation number of iron in sodium nitroprusside is

The oxidation state of iron in sodium nitroprusside is :

The colour developed when sodium sulphide is added to sodium nitroprusside is