Guest seminar has been organized by department of chemistry on 04-03-2023 on the topic. Seminar on evolution of graphene based biopolymer nanoparticles as potential adsorbent for removal of toxic metal ion in coal field effluents. Smt. Prabha Raj Asst. Prof. Department of Chemistry, Govt. V.P.G. College Manedragarh, Dist.- Korea (C.G.) has explained how to remove toxic elements and also how to prepare for various competition exam in this seminar M.Sc. Chemistry-IV semester 16 students are participated.