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COMEDK2012ChemistryGeneral Organic Chemistry

In Lassaigne's test for nitrogen in an organic compound, the blue colouration is due to the formation of

Options

  1. Aferro-ferriccyanide
  2. Bferric-ferrocyanide
  3. Cpotassium ferrocyanide
  4. Dpotassium ferrocyanide

Correct answer

B. ferric-ferrocyanide

Step-by-step solution

The blue colouration is due to formation of ferric ferrocyanide, Fe ₄ [ Fe ( CN )₆ ]₃ in Lassaigne's test for nitrogen.

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