Nitrogen detection in an organic compound is | vedclass

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Question

(B) The detection of nitrogen in an organic compound via Lassaigne's test involves the following chemical reactions:$Na + C + N \xrightarrow{\Delta} N

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$Fe_4[Fe(CN)_6]_3$

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(B) The detection of nitrogen in an organic compound via Lassaigne's test involves the following chemical reactions:$Na + C + N \xrightarrow{\Delta} NaCN$$2 NaCN + FeSO_4 \longrightarrow Fe(CN)_2 + Na_2SO_4$$Fe(CN)_2 + 4 NaCN \longrightarrow Na_4[Fe(CN)_6]$Finally,the sodium ferrocyanide reacts with ferric ions $(Fe^{3+})$ formed by the oxidation of some $Fe^{2+}$ to produce ferric ferrocyanide (Prussian blue):$3 Na_4[Fe(CN)_6] + 4 Fe^{3+} \longrightarrow Fe_4[Fe(CN)_6]_3 + 12 Na^{+}$The blue colour corresponds to the formula $Fe_4[Fe(CN)_6]_3$.

Nitrogen detection in an organic compound is carried out by Lassaigne's test. The blue colour formed corresponds to which of the following formulae?

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