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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

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

B

`Na_(3)[Fe(CN)_(6)]`

C

`Fe(CN)_(3)`

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
If nitrogen is present in organic compound then sodium extract contians `NaCN`.
`Na+C+N overset("Fusion") to NaCN`
`FeSO_(4) +6NaCN to Na_(4)[ Fe(CN)_(6)]+Na_(2)SO_(4)`
A changes to Prussian blue `Fe_(4)[FeCN)_(6)]_(3)` on reaction with `FeCl_(3)`
`4FeCl_(3)+3Na_(4)[ Fe(CN)_(6)] to Fe_(4) (CN)_(6)]_(3)+12 NaCl`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-BASIC PRINCIPLES AND TECHNIQUES IN ORGANIC CHEMISTRY-EXERCISE 2
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