The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is: - Chemistry MCQ AIEEE 2004 2026 | ExamTest.live | ExamTest.live

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

A $Fe_{4} [Fe (CN)_{6}]_{3}$
B $Na_{4} [Fe (CN)_{5} NOS]$
C $Fe (CN)_{3}$
D $Na_{3} [Fe (CN)_{6}]$

Solution & Step-by-step Explanation

In the Lassaigne's test for nitrogen, the formation of Prussian blue color indicates a positive result. This color is due to the formation of ferric ferrocyanide (Iron(III) hexacyanoferrate(II)), which has the chemical formula Fe_{4} [Fe (CN)_{6}]_{3} .

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

A

Fe_{4} [Fe (CN)_{6}]_{3}

B

Na_{4} [Fe (CN)_{5} NOS]

C

Fe (CN)_{3}

D

Na_{3} [Fe (CN)_{6}]

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