Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is -
Text Solution
Verified by ExpertsThe correct answer is:
A
If nitrogen is present in organic compound, then sodium extract contains Na4 [Fe(CN)6]
Na + C + N 
NaCN
FeSO4 + 6NaCN 
Na4[Fe(CN)6] + Na2SO4
(1)
A changes to prussian blue Fe4[Fe(CN)6]3
on reaction with FeCl3
4FeCl3 + 3Na4[Fe(CN)6 
Fe4[Fe(CN)6]3 + 12 NaCl
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