If an organic compound contains both Nitrogen and Sulphur, Lassaigne's fusion with a limited amount of sodium forms sodium thiocyanate (). Addition of to this extract produces:

Question

If an organic compound contains both Nitrogen and Sulphur, Lassaigne's fusion with a limited amount of sodium forms sodium thiocyanate ($NaSCN$). Addition of $FeCl_3$ to this extract produces:

Prashant Kotian · Accepted Answer

Correct answer: C. The thiocyanate ion () reacts with to form the ferrithiocyanate complex (), which imparts an intense blood-red colour to the solution.

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