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The compound formed in the positive test...

The compound formed in the positive test for nitrogen with Lassaigne's solution of an organic compound is

A

`Na_(4)[Fe(CN)_(6)]`

B

`Fe_(4)[Fe(CN)_(6)]_(3)`

C

`Fe(CN)_(2)`

D

`Na_(4)[Fe(CN)_(5)NOS]`

Text Solution

Verified by Experts

The correct Answer is:
B
It is ferri ferrocyanide
`6NaCN + FeSO_(4) rarr Na_(4)[Fe(CN)_(6)] + Na_(2)SO_(4)`
`3Na_(4)[Fe(CN)_(6)] + 2Fe_(2)(SO_(4))_(3) rarr Fe_(4)[Fe(CN)_(6)]_(3) + 6Na_(2)SO_(4)`
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