COMEDK · Chemistry · 13. General Organic Chemistry
The blue colouration obtained from the Lassaigne's test of nitrogen is due to the formation of
- A \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\)
- B \(\mathrm{Fe}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]_5\)
- C \(\mathrm{K}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]_5\)
- D \(\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\)
Answer & Solution
Correct Answer
(A) \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\)
Step-by-step Solution
Detailed explanation
The blue colouration is due to the formation of \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\) (ferriferrocyanide).
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