JEE Main Chemistry question

ChemistryPrinciples Related to Practical ChemistryJEE Main

In the Lassaigne's test for nitrogen, the Prussian-blue colour is due to the formation of ferric ferrocyanide, Feₓ[Fe(CN)₆]ᵧ. What is the value of x?

Answer: 4

Solution

Prussian blue has the formula Fe₄[Fe(CN)₆]₃.

Question ID VK-140444