$\mathrm{Fe}^{3+}$ cation gives a Prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:

Question

Canvas Classes · Accepted Answer

Step 1: Understand the Reaction

When  (from ) is treated with potassium ferrocyanide :

Step 2: Identify the Prussian Blue Complex

Prussian blue is formed in the Lassaigne nitrogen test. The formula involves:
-  from  (iron in +3 oxidation state)
-  from potassium ferrocyanide (iron in +2 state within complex)

The traditional formula is , but this question presents different options.

Step 3: Analyse Each Option

Per the answer key, (a)  is correct. This represents a structure where  cation

More questions from Practical Organic Chemistry