Hello students due to some recording problem some part of last Murexide chemical test was not complet. I explain in comment box. Murexide test : Found positive for Purine (Pseudoalkaloid) - Caffeine + Potassium chlorate add few drops of Hcl in china dish then evaporate to dryness red colour produced on residue treated with ammonia vapour violet/purple colour produced (Due to formation of Murexide complex)