This book is a compilation of nine chapters pertaining to chemistry research. Chapter one discusses the various environmental remediation applications of MnO2 nanoparticles. Chapter two illustrates benzotriazole compounds' functions as peptide-coupling reagents, coupling additives, and pH modifiers. They are compared with other coupling reagents/additives in reaction kinetics, side reactions, safety issues, and other related indices. Chapter three presents the results of studies on the synthesis of sulfonyl hydrazides from thiols and hydrazides by employing mixture of Na2S2O8-activated charcoal in aqueous acetonitrile solution. Chapter four delves into the synthesis, adsorption, and applications in food matrices. The authors of chapter five test copper (II) Schiff bases with chloro groups as antivirus drug candidates against Japanese encephalitis virus (JaGAr strain) with the help of molecular docking. Pyridine and quinoline bases from Coking products are discussed in chapter six. Chapter seven presents a review that focuses on the use of a diversity of solid materials as heterogenous catalysts for glycerol valorisation by acetalization reactions. Chapter eight highlights the recent advances and outlook for catalyst design strategies employed for liquid-phase glycerol selective oxidation. In the last chapter an efficient and green route is reported for the synthesis of 7,10,11,12-tetrahydrobenzo[c]acridin-8(9H)-ones in excellent yields.