In Lassaigne’s test, the presence of iodine is confirmed by the formation of a precipitate of what color with silver nit
Iodine forms NaI in Lassaigne’s test, which reacts with AgNO₃ to form a yellow precipitate of AgI.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Fundamental Concepts - Reaction Mechanism - Fission and Reaction Intermediates