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In the Lassaigne's test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of:
(a) \(\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]\)
(b) \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\)
(c) \(\mathrm{Fe}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]\)
(d) \(\mathrm{Fe}_3\left[\mathrm{Fe}(\mathrm{CN})_6 \mathrm{l}_4\right.\)
(a) \(\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]\)
(b) \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\)
(c) \(\mathrm{Fe}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]\)
(d) \(\mathrm{Fe}_3\left[\mathrm{Fe}(\mathrm{CN})_6 \mathrm{l}_4\right.\)
Solution:
1147 Upvotes
Verified Answer
(b) The prussian blue colour is due to the formation \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3\). Thus, option (b) is correct.
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