The book "General Engineering Chemistry (Volume-I)" is meant to provide a small but valuable sample of contemporary research activities around the world in this field and it is expected to be useful to a large number of students and basic researchers. Through its 5 chapters, the reader will have access to works related to the theory, principles, and concepts of various topics including inorganic molecular orbital theories, band structure diagrams, water treatment processes, electrochemical principles, electrodes, batteries, fuel cells, corrosion, stereochemistry, reaction mechanism, synthesis of drug molecules, and spectroscopic techniques and applications as advanced topics and several other exciting topics while it introduces the various applications based on the prescribed topics in academia and industry. It explores the key areas of chemistry needed for engineers. This book develops material from the basics to more advanced areas in a systematic fashion. As the material is presented, case studies relevant to engineering are included that demonstrate the strong link between chemistry and the various areas of engineering.