Detect the presence of nitrogen atom in the given organic compounds 'O'
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The carbon and nitrogen present in the organic compound on fusion with sodium metal gives sodium cyanide (NaCN) soluble in water. This is converted in to sodium ferrocyanide by the addition of sufficient quantity of ferrous sulphate. Ferric ions generated during the process react with ferrocyanide to form prussian blue precipitate of ferric ferrocyanide.
Na + C + N → NaCN
6NaCN + FeSO4 → Na4[Fe(CN)6] + Na2SO4
Sodium ferrocyanide
Na4[Fe(CN)6] + Fe3+ → Fe4[Fe(CN)6]3
Ferric ferrocyanide
Na + C + N → NaCN
6NaCN + FeSO4 → Na4[Fe(CN)6] + Na2SO4
Sodium ferrocyanide
Na4[Fe(CN)6] + Fe3+ → Fe4[Fe(CN)6]3
Ferric ferrocyanide
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