1.

Describe the reaction involved in the detection of Nitrogen in an organic compound by Lassaigne Method

Answer»

Solution :DETECTION of Nitrogen: The following reactions art: involved in the detection of nitrogen with formation of PRUSSIAN blue precipitate conforming the presence of nitrogen in an organic compound
`(i) underset("sodium")Na+underset("From organic Compund")"C+N" rarr underset("Sodium eyanide")"NaCN"`
`underset("FERROUS sulphate")(FeSO_(4))+underset("Sodium hydrox")"2NaOH" rarr underset("Ferrous hydroxide")(FE(OH)_(2))+Na_(2)SO_(4)`
`(iii)6 NaCN + Fe (OH)_(2) rarr underset("Sodium hydroxide")(Na_(4)[Fe(CN)_6] )+2NaOH`
`(iv) 3Na_(4)[Fe(CN)_(6)]+4FeCl_(3) rarr underset(underset("(Prussian blue precipitate)")"Ferric ferrcyanide")(Fe_(4) [ Fe(CN)_(6)]darr+12NaCl`


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